Thrust plain bearing

FIELD: machine building.

SUBSTANCE: invention relates to a plain thrust bearing from synthetic resin, namely, to a plain thrust bearing used in post-type suspensions (McPherson suspension) for four-wheeled vehicle as a plain thrust bearing. The thrust plain bearing (1) comprises an upper casing (2) from synthetic resin, a lower casing (3) from synthetic resin overlapped onto the upper casing (2) and able of rotation around the axis (O) along the circle (R) in respect to the upper casing (2), a unit (5) of the thrust plain bearing from synthetic resin placed in the annular space (4) between the upper casing (2) and the lower casing (3), and a sealing element (8) from synthetic resin to seal the respective opposite protruding-to-outside ends of the gap (6) on the internal periphery side and of the gap (7) on the external periphery side in the radial direction (A) between the upper casing (2) and the lower casing (3), therewith one end with the hole of the gap (6) and the gap (7) respectively is communicated with the annular space (4).

EFFECT: design of a thrust plain bearing with more efficient assembly and replaceability, providing for additional rise of durability and sealability.

4 cl, 24 dwg

 

The technical field to which the invention relates.

The present invention relates to a thrust bearing made of synthetic resin, more precisely the thrust sliding bearing is applicable as a thrust sliding bearing in the suspension rack type (suspension MacPherson) four-wheeled vehicle.

The level of technology

In patent document 1 describes a sliding bearing made of synthetic resin having the lower body of a synthetic resin, the upper body is made of synthetic resin placed on the lower casing, and the node a thrust bearing made of synthetic resin that fit between the upper and lower housings, and the sliding bearing made of synthetic resin comprises an outer elastic sealing means on the outer peripheral side between the upper and lower housings, and internal elastic sealing means on the inner peripheral side between the upper and lower housings.

In patent document 2 describes a sliding bearing made of synthetic resin having the lower body of a synthetic resin, the upper body is made of synthetic resin placed on the lower casing, and the node a thrust bearing made of synthetic resin that fit between the upper and lower housings, the bearing of synthetic is some resin comprises an outer elastic sealing means, located on the outer peripheral side in the space between the upper and lower housings and the inner labyrinth sealing means on the inner peripheral side in the space between the upper and lower housings.

In patent document 3 describes a sliding bearing made of synthetic resin having the lower body of a synthetic resin, the upper body is made of synthetic resin placed on the lower casing, and the node a thrust bearing made of synthetic resin that fit between the upper and lower housings, and the sliding bearing made of synthetic resin consists of an elastic sealing means which covers the outer surface of the lower housing and seals the outer and inner ring hole space between the upper and lower housings at both ends with holes.

In patent document 4 describes a sliding bearing made of synthetic resin, having an upper housing with an annular bottom surface, the bottom case, which is superimposed on the upper body rotatably around the axis of the upper casing and has an annular upper surface, and an annular thrust element sliding fit in the annular space between the annular bottom surface and an annular upper surface, and the sliding bearing consists of plataue what about the tools, located at least on one side of the outer peripheral side and inner peripheral side of the annular space.

In addition, in patent document 5 describes a sliding bearing made of synthetic resin, having the upper body of synthetic resin with the annular lower surface, the lower body of a synthetic resin with an annular upper surface, the site of an axial sliding fit in the annular gap between the annular bottom surface and an annular upper surface.

The documents of the prior art

Patent documents

Patent document 1:JP-A-2001-27227

Patent document 2:JP-A-2001-27228

Patent document 3:JP-A-2001-27229

Patent document 4:JP-A-2007-303643

Patent document 5:JP-A-2009-250278

Summary of the invention

Objectives of the invention

Since the sliding bearing according to patent document 1 for sealing the respective gaps on inner and outer peripheral surfaces between the upper and lower housings is provided inside the elastic sealing material and the outer elastic sealing material made in the form of individual elements arranged in the respective gaps, the time required for Assembly, and, accordingly, may increase the cost of manufacturing. Since p is Lipnice slip in patent document 2 for sealing the internal gap between the upper and lower housings used labyrinth sealing means, he has several worst ability to prevent the ingress of dust and contaminated water from a gap on the inner periphery side in comparison with the elastic sealing means. Since the sliding bearing according to patent document 3 elastic sealing means for sealing the respective gaps on inner and outer peripheral surfaces between the upper and lower housings is located on the outer surface of the lower housing, there is the possibility of separating the elastic sealing means from the lower housing when operating for a long time. Since the sliding bearing according to patent document 4 for sealing the respective gaps on inner and outer peripheral surfaces between the upper and lower housings is provided inside the elastic sealing material and the outer elastic sealing material made in the form of individual elements arranged in the respective gaps, the time required for Assembly, and, accordingly, may increase the cost of manufacture, as in the case of a sliding bearing according to patent document 1. Since the sliding bearing according to patent document 5 for sealing the respective gaps on inner and outer peripheral surfaces between the upper and lower housings used the labyrinth at lotname means, he has several worst ability to prevent the ingress of dust and water contamination of the gaps on the inner and outer peripheral surfaces compared with the elastic sealing means. In none of these bearings is not provided satisfactory the cost of manufacture, durability and germetiziruetsja.

The present invention is created taking into account these differences, and it is based on the task of creating a thrust sliding bearing with a higher efficiency of Assembly and substitution that reduce the cost of manufacture and to further increase the durability and germetiziruetsja.

Means of solving problems

Proposed in the present invention the thrust sliding bearing has an upper casing made of synthetic resin in one piece with the annular lower portion having an annular bottom surface which passes in the axial direction, is suspended from the inner peripheral side of the cylindrical part, which is suspended from the radial inner peripheral end of the annular bottom surface of the lower part of the upper casing and suspended from the outer peripheral side of the cylindrical part, which is suspended from the radial outer peripheral end of the annular bottom surface of the lower part werhner the housing; the lower body of a synthetic resin in one piece with the annular lower portion having an annular upper surface, which runs in the axial direction and superimposed on the upper body rotatably around an axis relative to the upper housing, and an annular protrusion extending from the annular upper surface of the lower part of the lower body towards the annular bottom surface of the lower part of the upper housing; node thrust bearing made of synthetic resin sliding fit in the annular space between the annular lower surface of the lower part of the upper casing and the annular top surface of the bottom portion of the lower housing so to enter the axial annular upper the surface and its radial cylindrical inner peripheral side in sliding contact with the annular lower surface of the lower part of the upper housing and the radial outer peripheral surface suspended from the inner peripheral side of the cylindrical part and enter the axial annular bottom surface and a radial cylindrical outer peripheral surface in contact with an axial annular upper surface and a radial cylindrical inner peripheral surface of the annular protrusion; and a sealing element made of synthetic resin, n is the radial inner peripheral side of which is flexible inner peripheral annular sealing portion, which comes in contact with the radial inner peripheral surface suspended from the inner peripheral side of the cylindrical part of the upper shell so as to seal the gap between suspended from the inner peripheral side of the cylindrical portion of the upper shell and the lower part of the lower hull, on the radial outer peripheral side of which is flexible outer peripheral annular sealing portion which comes in contact with the radial inner peripheral surface suspended from the outer peripheral side of the cylindrical part of the upper shell so as to seal the gap between suspended from the outer peripheral side of the cylindrical portion of the upper shell and the lower part of the lower housing, and which has a number of connecting parts spaced from each other in the axial direction in such a way as to connect with each other of the inner peripheral annular sealing portion and the outer peripheral annular sealing portion, with each of the multiple connecting parts located between the site of the thrust sliding bearing and the annular protrusion of the lower casing, one end in one piece connected to the inner peripheral annular sealing part and its other end connected with an external peripherin the second annular sealing part.

In the thrust sliding bearing according to the present invention one end of each of a large number of connecting parts for one unit is connected to the internal peripheral annular sealing part and the other end connected to the outer peripheral annular sealing part, which reduces the number of parts and improve the efficiency of Assembly and substitutability and thereby reduce the manufacturing cost. In addition, since each of the sets of connecting parts located between the site of the thrust sliding bearing and the annular protrusion of the lower housing may be increased longevity by eliminating the possibility of separation. In addition, because the sealing element has an inner peripheral annular sealing portion and the outer peripheral annular sealing portion for sealing gaps between suspended from the inner peripheral side of the cylindrical portion of the upper shell and the lower part of the lower building on the radial inner peripheral side and outer peripheral side can be further improved germetiziruetsja.

In one preferred examples of the thrust sliding bearing according to the present invention, each of the connecting parts of the sealing element has a radial connecting portion, one end of which is Oh for one unit is connected to the outer peripheral annular sealing part, and axial connecting portion, one end of which is in one piece connected with the other end of the radial connecting portion and its other end connected with an inner peripheral annular sealing part, with the upper axial surface of the annular projection of the bottom of the case is made of grooves, which are spaced from each other in the axial direction and including respective radial part of the connecting parts, and on its radial inner peripheral side is made grooves, which are spaced from each other in the axial direction and connected with the corresponding grooves on the upper surface and including a corresponding axial portion of the connecting parts, the upper surface of the annular protrusion of the lower case except for the grooves on the top surface is flush with or higher than the axial upper surface of the radial part of the connecting part and the inner peripheral surface of the annular protrusion of the lower case except for the grooves on the inner peripheral side is flush or radially inside the radial inner side surface of the axial part of the connecting part, and the node thrust sliding bearing has a radial portion of the sliding element, which is in contact with the top surface of the ring in the stupa of the lower housing, and the axial part of the sliding element, which is in contact with the inner peripheral surface of the annular protrusion of the lower shell.

In the thrust sliding bearing according to this example, the radial part of the sliding element may be in contact with the top surface of the annular projection of the bottom housing and the top surface of the radial part of the connecting part, and the axial part of the sliding element may be in contact with the inner peripheral side surface of the annular protrusion of the lower shell and the inner lateral surface of the axial part of the fitting. Alternatively, the radial part of the sliding element may be in contact with the top surface of the annular protrusion of the lower casing and having clearance with the top surface of the radial part of the connecting part, and may be in contact with the inner peripheral surface of annular projection of the bottom of the casing and having a clearance with the inner lateral surface of the axial part of the fitting.

In another preferred example, on the radial outer peripheral part of the upper surface of annular projection has an annular stepped portion with a cutout, and a flexible outer peripheral annular sealing part has an annular outer peripheral seal is IGNOU part, the radial inner peripheral end of which one is connected to the radial outer end of the radial connecting piece and which is fitted to a stepped portion with a cutout, and a flexible outer peripheral sealing portion, the radial inner peripheral end of which one is connected to the radial outer peripheral end of the outer peripheral sealing the lower part and which is in contact with the inner peripheral surface suspended from the outer peripheral side of the cylindrical part of the upper body. The outer peripheral sealing portion passes diagonally downward from the inner peripheral end which has a smaller thickness on the axis than the thickness along the axis of the outer peripheral sealing the lower part, and is connected to the radial outer peripheral end of the outer peripheral sealing the bottom.

In one piece with the lower part of the lower body has an annular inner peripheral ledge extending from the radial inner periphery of the annular top surface of the lower part of the lower body towards the annular bottom surface of the lower part of the upper casing and forming an inner peripheral circular groove communicating with the inner peripheral surface of the annular protrusion and the inner peripheral the applications of the annular sealing part has an annular inner peripheral sealing the lower part, the radial outer peripheral end of which one is connected with the axial lower end of the axial connecting piece and which is fitted to the inner peripheral circular groove, and a flexible inner peripheral sealing portion, a radial outer peripheral end of which is connected to the radial inner peripheral end of the inner peripheral sealing the lower part and which is in contact with the outer peripheral surface suspended from the inner peripheral side of the cylindrical part of the upper body. The inner peripheral seal portion can be carried diagonally downward from the outer peripheral end which has a smaller thickness on the axis than the inner peripheral sealing the lower part and connected to the radial inner peripheral end of the inner peripheral sealing the bottom.

The upper housing may have an annular mounting part made in one piece on the radial Central part of the axial annular upper surface of the lower part of the upper case.

In one of the preferred examples is suspended from the inner peripheral side of the cylindrical part has a thick-walled cylindrical part, the axial upper end of which is connected to the radial inner peripheral lower end of the ring p is the surface of the lower part of the upper housing, and thin-walled cylindrical part, the axial upper end of which is connected to the axial lower end of the thick-walled cylindrical part and which is more thin than thick-walled cylindrical part. Internal peripheral annular sealing portion is in contact with the radial cylindrical inner peripheral surface of the thin-walled cylindrical part, and suspended from the outer peripheral side of the cylindrical part includes having a trapezoidal cross-section of the cylindrical portion, the axial upper end of which is connected to the radial outer peripheral end of the annular bottom surface of the lower part of the upper housing and has an inner peripheral surface, the diameter of which gradually increases in the axial direction from the annular lower surface of the lower part of the upper housing and extending cylindrical portion, the axial upper end of which is connected to the axial lower end of the cylindrical part with a trapezoidal cross-section and has an inner peripheral surface, the diameter of which is gradually decreases in the axial direction from the axial lower end of the cylindrical portion with a trapezoidal cross-section and gradually increases in a direction from the end with a reduced diameter, and the outer peripheral ring upl is trauma part is in contact with a trapezoidal cross-section of the cylindrical part.

In one preferred examples of the annular protrusion has an arcuate outer peripheral surface with a recess, the axial lower end of which is connected to the outer peripheral end of the annular upper surface of the bottom of the lower housing and the diameter of which gradually decreases in the axial direction from the annular upper surface of the lower part of the lower case.

The thrust sliding bearing according to the present invention preferably is used as a thrust sliding bearing in the suspension rack type four-wheeled vehicle.

As in the synthetic resin for forming the upper shell and the lower shell can be used a thermoplastic synthetic resin, such as polyacetylene resin, polyamide resin or polyester resin. In addition, as the synthetic resin for forming uslw thrust sliding bearing can be used a thermoplastic synthetic resin, such as polyacetylene resin, polyamide resin, polyolefin resin or polyester resin. As one of the preferred examples of the synthetic resin for forming the sealing element can be called polyurethane.

Advantages of the invention

In accordance with the present invention can be created hard by Lipnik slip with a higher efficiency of Assembly and replacement, reducing the cost of manufacture and to further increase the durability and germetiziruetsja.

Brief description of drawings

In Fig.1 shows an explanatory view in cross section along the arrow I-I in Fig.3 one of the preferred embodiments of the present invention,

in Fig.2 shows an explanatory front view of a variant of implementation, illustrated in Fig.1,

in Fig.3 shows an explanatory view in plan of a variant of implementation, illustrated in Fig.1,

in Fig.4 shows an explanatory view in perspective of a variant of implementation, illustrated in Fig.1,

in Fig.5 shows an explanatory partially enlarged view in transverse section of a variant of implementation, illustrated in Fig.1,

in Fig.6 shows an explanatory view in cross section of the upper shell according to a variant implementation, illustrated in Fig.1,

in Fig.7 shows an explanatory partially enlarged view in transverse section of the upper shell, illustrated in Fig.1,

in Fig.8 shows an explanatory view in cross section along the arrow VIII-VIII in Fig.9 lower housing according to a variant implementation, illustrated in Fig.1,

in Fig.9 shows an explanatory view in plan of the lower casing according to a variant implementation, illustrated in Fig.1,

in Fig.10 shows an explanatory perspective view of the lower housing according to a variant implementation, illustrated in Fig.1,

in Fig.11 shows an explanatory view in cross section along arrow XI-XI in Fig.9 lower housing according to a variant implementation, illustrated in Fig.1,

in Fig.12 shows an explanatory view in cross section along the arrow XII-XII in Fig.9, the lower housing according to a variant implementation, illustrated in Fig.1,

in Fig.13 shows a partial enlarged explanatory view in plan of the lower casing according to a variant implementation, illustrated in Fig.1,

in Fig.14 shows an explanatory view in cross section along the arrow XIV-XIV in Fig.15 node thrust sliding bearing according to a variant implementation, illustrated in Fig.1,

in Fig.15 shows an explanatory view in plan of the site of the thrust sliding bearing according to a variant implementation, illustrated in Fig.1,

in Fig.16 shows an explanatory bottom view of the site of the thrust sliding bearing according to a variant implementation, illustrated in Fig.1,

in Fig.17 shows an explanatory view in cross section along the arrow XVII-XVII in Fig.15 node thrust sliding bearing according to a variant implementation, illustrated in Fig.1,

in Fig.18 shows poyasnitelni is th is a view along arrow XVIII-XVIII in Fig.15 node thrust sliding bearing according to a variant implementation, is illustrated in Fig.1,

in Fig.19 shows an explanatory front view of the sealing element according to a variant implementation, illustrated in Fig.1,

in Fig.20 shows an explanatory front view of the sealing element according to a variant implementation, illustrated in Fig.1,

in Fig.21 shows an explanatory bottom view of the sealing element according to a variant implementation, illustrated in Fig.1,

in Fig.22 shows an explanatory perspective view of the front side of the sealing element according to a variant implementation, illustrated in Fig.1;

in Fig.23 shows an explanatory perspective view of the lower side of the sealing element according to a variant implementation, illustrated in Fig.1, and

in Fig.24 shows an explanatory view of the arrow XXIV-XXIV in Fig.20 sealing element according to a variant implementation, illustrated in Fig.1.

The best option of carrying out the invention

Hereinafter the present invention will be described in more detail with reference to the preferred implementation illustrated in the drawings. It should be noted that the present invention is not limited to this embodiment.

As shown in Fig.1-5, the thrust bearing 1 slide according to the considered variant of realization of the application for the suspension, and rack-mounted type four-wheel vehicle consists of the upper housing 2 made of synthetic resin, which mounting element attached to the body surface of the vehicle; the lower shell 3 made of synthetic resin, which is superimposed on the upper housing 2 rotatably around the axis Of the circumference of R relative to the upper housing 2 and attached to the surface of the socket coil springs suspension; node 5 thrust sliding bearing made of synthetic resin that are placed in the annular space 4 between the upper casing 2 and lower casing 3; and a sealing element 8 made of synthetic resin for sealing the respective opposite outside ends of the gap 6 on the inner peripheral side and the gap 7 on the outer peripheral side in the radial direction between A the upper housing 2 and lower housing 3, with one end opening of the gap 6 and the gap 7, respectively, communicates with the annular space 4.

As particularly shown in detail in Fig.5-7, in one piece with the upper housing 2 has an annular bottom portion 12 having an annular bottom surface 11, which passes in the axial direction B, is suspended from the inner peripheral side of the cylindrical part 14, which is suspended from the inner peripheral end 13 in the radial direction, A circular bottom surface 11 of the lower part 12 of the upper shell, is suspended from the outer peripheral side of Jindrisska part 16, which is suspended from the outer peripheral end 15 in a radial direction And an annular bottom surface 11 of the lower part 12 of the upper casing, and an annular mounting portion 18, protruding from the Central part in the radial direction, A circular top surface 17 of the lower part 12 of the upper shell.

Suspended from the inner peripheral side of the cylindrical portion 14 has a thick-walled cylindrical part 22, the upper end 21 of which is connected to the inner peripheral end 13 of the annular bottom surface 11 of the lower part 12 of the upper shell, and a thin-walled cylindrical part 27, the upper end 23 of which is connected with the lower end 26 of the thick-walled cylindrical part 22 through the inner peripheral stepped annular surface 24 and the outer peripheral stepped annular surface 25 and which is more thin than thick-walled cylindrical part 22.

Thick-walled cylindrical part 22 and the thin-walled cylindrical part 27 respectively have a cylindrical inner peripheral surface 29 and 30, forming a through hole 28, into which is inserted the shaft of the suspension rack type. Thick-walled cylindrical part 22 has a cylindrical outer peripheral surface 31, and a thin-walled cylindrical part 27 has a cylindrical NR is šnē peripheral surface 32 of smaller diameter, than at the outer peripheral surface 31.

Suspended from the outer peripheral side of the cylindrical part 16 with a cylindrical external peripheral surface 35 has a cylindrical portion 38 with a trapezoidal cross section, the upper end 36 which is connected to the outer peripheral end 15 of the annular bottom surface 11 of the lower part 12 of the upper shell and which has an inner peripheral surface 37 with a gradually increasing diameter in the direction from the annular bottom surface 11 of the lower part 12 of the upper shell, and also has an expanding cylindrical portion 42, the upper end 39 of which is connected with the lower end 40 of the cylindrical part 38 with a trapezoidal cross-section and which has an inner peripheral surface 41 with a gradually decreasing diameter in direction from the end 40 of the cylindrical part 38 with a trapezoidal cross-section and gradually increasing diameter in the direction from the end with decreasing diameter.

How, in particular, shown in detail in Fig.5 and in Fig.8-13, in one piece with the lower housing 3 is made annular lower part of the lower housing 52 with the annular upper surface 51; of an annular upper surface 51 of the lower part of the lower housing 52 in the direction of the annular bottom surface 11 of the lower part 12 of the upper shell is an annular ledge 53; kolicevo the upper surface 51 toward the annular bottom surface 11 of the lower part 12 of the upper shell on the inner peripheral side of the ring 56 of the upper surface 51 is annular inner peripheral ledge 57, resulting in an inner peripheral circular groove 55 that communicates with the cylindrical inner peripheral surface 54 in the radial direction And an annular ledge 53; from the inner peripheral portion 59 of the annular bottom surface 58 of the lower part of the lower housing 52 in the direction from the annular bottom surface 58 is a hollow cylindrical part 60; from the cylindrical inner peripheral side 62 of the hollow cylindrical portion 60 on the end 61 of the hollow cylindrical portion 60 is inside the annular protruding portion 63; from the end 61 of the hollow cylindrical portion 60 is an annular protruding portion 64; and from the outer peripheral edge part of the annular top surface 65 the annular projection 53 at the side of the annular bottom surface 11 of the lower part 12 of the upper shell is many tabs 66, which are spaced from each other along the outer peripheral edge part of the annular top surface 65 in the direction of the R axis (in the direction R along the circumference).

The annular protrusion 53 has an annular stepped portion 71 is cut on the outer periphery of its top surface 65; circular arcuate outer peripheral surface 73, the lower end 72 which is connected to the outer peripheral end of the annular top surface 51 of the lower part of the lower to the Pusa 52 and the diameter of which gradually decreases in the direction from the annular top surface 51 of the lower part of the lower housing 52; many grooves 74 on its upper surface 65, spaced from each other by the same distance in the direction R along the circumference; many grooves 75 on its inner peripheral side 54, spaced from each other by the same distance in the direction R along the circumference so that respectively communicate with the grooves 74 on the upper surface and with an inner peripheral circular groove 55.

The inner peripheral surface 62 of the hollow cylindrical portion 60 and an annular inner peripheral surface 76 protruding part 63 form a through hole 77, which has a common axis with a through hole 28 and into which is inserted the shaft of the suspension rack type.

As particularly shown in detail in Fig.5 and in Fig.14-18, the node 5 a thrust bearing made of synthetic resin sliding fit in the annular space 4 between the annular bottom surface 11 of the lower part 12 of the upper shell and the annular upper surface 51 of the lower part of the lower housing 52 has an annular radial portion 83 of the sliding element with the annular upper surface 81, which is in sliding contact with the annular bottom surface 11 of the lower part 12 of the upper casing, and an annular bottom surface 82, which is in contact with the top surface 65 of the annular protrusion 53; cylindric will stifle the axial portion 86 of the sliding element, one end of which is made in one piece with one end of the radial portion 83 of the sliding element so that to go down, and which has a circular inner side surface 84, which is in sliding contact with the outer peripheral surface 31 a thick-walled cylindrical part 22, and an annular outer side surface 85, which is in contact with the inner peripheral surface 54 of the annular protrusion 53; and the multitude of radial protruding plate portions 88 which protrude outwards from the outer peripheral side 87 of the radial part 83 of the sliding element and are respectively between the tabs 66 in the direction R along the circumference and clamped neighboring protrusions 66, resulting in the node 5 of the thrust bearing does not rotate in the direction R along the circumference relative to the lower housing 3.

The radial portion 83 of the sliding element has an annular groove 91, was performed on the inner peripheral side of the upper surface 81, and many of radial grooves 92, one end of which communicates with the annular groove 91 and the other end opens onto the outer peripheral surface 87, and which are spaced at the same distance from each other on the upper surface 81 in the direction R along the circumference. The axial portion 86 of the sliding element has mnozhestvennyh grooves 93, both ends which are open and which are spaced at the same distance from each other on the inner side surface 84 in the direction R along the circumference. Annular groove 91, radial grooves 92 and axial grooves 93 serve as a sump for lubricating oil.

As shown in detail particularly in Fig.19-24, on the inner peripheral side of the sealing element 8 is flexible inner peripheral annular sealing portion 103, which is elastically flexible in contact with the outer peripheral surface 32 of thin-walled cylindrical part 27 is suspended from the inner peripheral side of the cylindrical part 14 and seals the gap 6 between the thin-walled cylindrical portion 27, i.e., the axial end 101 is suspended from the inner peripheral side of the cylindrical part 14 of the upper shell 2 and an annular inner peripheral ledge 57, i.e., the inner peripheral end 102 of the lower part of the lower housing 52 of the lower housing 3, and at its outer peripheral side is flexible outer peripheral ring the sealing portion 106, which is elastically flexible in contact with the inner peripheral surface 37 of the cylindrical part 38 with a trapezoidal cross-section is suspended from the outer peripheral side of the cylindrical part 16 and seals the gap 7 between the axial end 104 is suspended from the on uenoi peripheral side of the cylindrical part 16 of the upper shell 2 and the outer peripheral end 105 of the lower part of the lower housing 52 of the lower housing 3. In addition, the sealing element 8 has many connection parts 107 to connect with each other of the inner peripheral annular sealing portion 103 and the outer peripheral annular sealing portion 106.

Each set of connection parts 107, which are spaced from each other by the same distance in the direction R along the circumference, has a radial connecting part 113, one end 111 to which one is connected with the annular inner peripheral end 112 of the outer peripheral annular sealing portion 106, and an axial connecting portion 118, one end 114 which one is connected to the end 115 of the radial connecting portion 113 and the other end 116 which is connected to the annular outer peripheral end 117 of the inner peripheral annular sealing portion 103.

The other end 116 of each of the sets of connecting pieces 107 for one connected with the inner peripheral annular sealing part 103 and one end 111 is connected to the outer peripheral annular sealing part 106 due to the fact that is located between node 5 thrust sliding bearing and the annular projection 53 of the lower housing 3, when the radial connecting portion 113 is included in each of the grooves on the upper surface 74 and the axial connecting part 118 is included in each of the grooves at GNC is Rennie peripheral side of 75.

Internal peripheral annular sealing portion 103 has an annular inner peripheral sealing the lower part 131, an annular outer peripheral end 117 which one is connected with the axial lower end, i.e. the other end 116 of the axial connecting part 118, and which is fitted to the inner peripheral circular groove 55, and a flexible inner peripheral sealing portion 134, the outer peripheral end 132 which is connected to the inner peripheral end 133 of the inner peripheral sealing the lower part 131 and which is elastically flexible in contact with the outer peripheral surface 32 of thin-walled cylindrical part 27 is suspended from the inner peripheral side of the cylindrical part 14.

The inner peripheral seal portion 134 passes diagonally downward from the outer peripheral end 132, which has a smaller thickness than the inner peripheral sealing the lower part 131, and which is connected with the inner peripheral end 133 of the inner peripheral sealing the lower part 131.

The outer peripheral annular sealing portion 106 includes an annular outer peripheral sealing the lower portion 141, an annular inner peripheral end 112 which one is connected with the outer lower end, i.e., one end 111 of the radial connector is the second part 113, and which is fitted to the stepped portion 71 is cut, and a flexible outer peripheral sealing portion 144, the inner peripheral end 142 which is connected to the outer peripheral end 143 of the outer peripheral sealing the lower part 141 and which is elastically flexible in contact with the inner peripheral surface 37 of the cylindrical part 38 with a trapezoidal cross-section is suspended from the outer peripheral side of the cylindrical part 16. The outer peripheral sealing portion 144 passes diagonally downward from the inner peripheral end 142, which has a smaller thickness than the outer peripheral sealing the lower portion 141, which is connected to the outer peripheral end 143 of the outer peripheral sealing the lower part 141.

The upper surface 151 of the radial connecting portion 113 of the connecting part 107 is flush with the top surface 65 of the annular projection 53 of the lower housing 3 with the exception of the grooves on the upper surface 74 and an inner side surface 152 of the axial connecting portion 118 of the connecting part 107 is flush with the inner peripheral surface 54 of the annular projection 53 of the lower housing 3 with the exception of the grooves on the inner peripheral side of 75. Accordingly, the lower surface of the radial portion 83 of the sliding element 82 is Vkontakte with the top surface 65 of the annular projection 53 of the lower shell 3 and the upper poverhnosti radial connecting portion 113 of the connecting part 107, and the outer side surface 85 of the axial portion 86 of the sliding element is in contact with the inner peripheral surface 54 of the annular projection 53 of the lower shell 3 and the inner side surface 152 of the axial connecting portion 118 of the connecting part 107.

Alternatively described the location of the top surface 65 of the annular projection 53 of the lower housing 3 with the exception of the grooves on the upper surface 74 may be located higher than the upper surface 151 of the radial portion 113 of the connecting part 107, and the inner peripheral surface 54 of the annular projection 53 of the lower housing 3 with the exception of the grooves on the inner peripheral side 75 may be located radially inside the inner-side surface 152 of the axial portion 118 of the connecting part 107. In this case, the axial part 83 item-slip bottom surface 82 is in contact with the top surface 65 of the annular projection 53 of the lower housing 3 and has a gap with the upper surface 151 of the radial connecting portion 113 of the connecting part 107, and the outer side surface 85 of the axial portion 86 of the sliding element is in contact with the inner peripheral surface 54 of the annular projection 53 of the lower housing 3 and has a clearance with the inner side surface 152 of the axial connecting portion 118 of the connecting part 107.

the written thrust bearing 1 slide adapted to provide rotation of the lower housing 3 relative to the upper housing 2 in the direction R along the circumference by means of sliding in the direction R along the circumference of each of next: the top surface 81 of the radial part 83 of the sliding element relative to the annular bottom surface 11 of the lower part 12 of the upper shell and the inner side surface 84 of the axial portion 86 of the sliding element relative to the outer peripheral surface 31 a thick-walled cylindrical part 22.

As described thrust bearing 1 slide one end of each of a large number of connecting parts 107 for one connected with the inner peripheral annular sealing part 103, and its other end connected to the outer peripheral annular sealing part 106 may be a reduced number of parts, the improved efficiency of the Assembly and substitutability, which reduces the cost of manufacture. In addition, since each of the sets of connecting pieces 107 is located between node 5 thrust sliding bearing and the annular projection 53 of the lower housing 3, can be increased longevity by eliminating the possibility of offices.

In addition, since the thrust bearing 1 slide the sealing element 8 has an inner peripheral annular sealing portion 103 to seal the gap 6 between suspended from the inner peripheral side of the cylindrical part 14 of the upper shell 2 and the inner peripheral end 102 of the lower shell 3 and the outer peripheral to iceway sealing portion 106 to seal the gap 7 between suspended from the outer peripheral side of the cylindrical portion 16 of the upper shell 2 and the outer peripheral end 105 of the lower shell 3, can be further improved germetiziruetsja.

Description reference positions

1: thrust bearing

2: upper case

3: lower case

4: the annular space

5: node thrust sliding bearing

6, 7: gap

8: sealing element

1. Thrust sliding bearing having the upper body of synthetic resin in one piece with the annular lower portion having an annular bottom surface which passes in the axial direction, is suspended from the inner peripheral side of the cylindrical part, which is suspended from the radial inner peripheral end of the annular bottom surface of the lower part of the upper casing and suspended from the outer peripheral side of the cylindrical part, which is suspended from the radial outer peripheral end of the annular bottom surface of the lower part of the upper body; lower body of a synthetic resin in one piece with the annular lower portion having an annular upper surface, which runs in the axial direction and superimposed on the upper body rotatably around an axis relative to the upper housing, and an annular protrusion extending from the annular upper surface of the lower part of the lower body towards the annular lower surface of the lower part in rnego housing; node a thrust bearing made of synthetic resin sliding fit in the annular space between the annular lower surface of the lower part of the upper casing and the annular top surface of the bottom portion of the lower housing so to enter the axial annular upper surface and a radial cylindrical inner peripheral side in sliding contact with the annular lower surface of the lower part of the upper housing and the radial outer peripheral surface suspended from the inner peripheral side of the cylindrical part and enter the axial annular bottom surface and a radial cylindrical outer peripheral surface in contact with an axial annular upper surface and a radial cylindrical inner peripheral surface of the annular protrusion; and sealing element made of synthetic resin, on the radial inner peripheral side of which is flexible inner peripheral annular sealing portion which comes in contact with the radial inner peripheral surface suspended from the inner peripheral side of the cylindrical part of the upper shell so as to seal the gap between suspended from the inner peripheral side of the cylindrical portion of the upper shell and the lower cartuning housing, on the radial outer peripheral side of which is flexible outer peripheral annular sealing portion which comes in contact with the radial inner peripheral surface suspended from the outer peripheral side of the cylindrical part of the upper shell so as to seal the gap between suspended from the outer peripheral side of the cylindrical portion of the upper shell and the lower part of the lower housing, and which has a number of connection elements, spaced from each other in the axial direction in such a way as to connect with each other of the inner peripheral annular sealing portion and the outer peripheral annular sealing portion, with each of the multiple connecting parts located between the node thrust bearing slip ring and the projection of the bottom of the housing, one end in one piece connected to the inner peripheral annular sealing part and its other end connected to the outer peripheral annular sealing part.

2. Thrust sliding bearing under item 1, in which each of the connecting parts of the sealing element has a radial connecting portion, one end of which one is connected to the outer peripheral annular sealing part, and the axial connecting portion, one end of which is but one connected with the other end of the radial connecting part, and its other end connected with an inner peripheral annular sealing part, with the upper axial surface of the annular projection of the bottom of the case is made of grooves, which are spaced from each other in the axial direction and including respective radial part of the connecting parts, and on its radial inner peripheral side is made grooves, which are spaced from each other in the axial direction and connected with the corresponding grooves on the upper surface and including a corresponding axial portion of the connecting parts, the upper surface of the annular protrusion of the lower case except for the grooves on the top surface is flush with or higher than the upper axial surface the radial part of the connecting part and the inner peripheral surface of the annular protrusion of the lower case except for the grooves on the inner peripheral side is flush or radially inside the radial inner side surface of the axial part of the connecting part, and the node thrust sliding bearing has a radial portion of the sliding element, which is in contact with the top surface of the annular protrusion of the lower housing, and the axial part of the sliding element, which is in contact with the inner peripheral over the awn annular protrusion of the lower shell.

3. Thrust sliding bearing under item 1 or 2, in which the radial outer peripheral part of the upper surface of annular projection has an annular stepped portion with a cutout, and a flexible outer peripheral annular sealing part has an annular outer peripheral sealing the lower part, the radial inner peripheral end of which one is connected to the radial outer end of the radial connecting piece and which is fitted to a stepped portion with a cutout, and a flexible outer peripheral sealing portion, the radial inner peripheral end of which one is connected to the radial outer peripheral end of the outer peripheral sealing the lower part and which is in contact with the inner peripheral surface suspended from the outer peripheral side of the cylindrical part of the upper case.

4. Thrust sliding bearing under item 1 or 2, in which in one piece with the lower part of the lower body has an annular inner peripheral ledge extending from the radial inner periphery of the annular top surface of the lower part of the lower body towards the annular bottom surface of the lower part of the upper body, and forms an inner peripheral circular groove communicating with the inner peripheral surface is rnostly annular protrusion, and the inner peripheral annular sealing part has an annular inner peripheral sealing the lower part of the radial outer peripheral end of which one is connected with the axial lower end of the axial connecting piece and which is fitted to the inner peripheral circular groove, and a flexible inner peripheral sealing portion, a radial outer peripheral end of which is connected to the radial inner peripheral end of the inner peripheral sealing the lower part and which is in contact with the outer peripheral surface suspended from the inner peripheral side of the cylindrical part of the upper body.



 

Same patents:

Sliding bearing // 2528246

FIELD: machine building.

SUBSTANCE: sliding bearing comprises the housing with the antifriction insert made from cermet. From the insert ends in the housing the sealing rings with an inner diameter equal to an inner diameter of the insert, made from a material with a durability not greater, than the durability of the insert material, are installed.

EFFECT: improvement of tribotechnical characteristics of the sliding bearing.

1 dwg

Friction bearing // 2427733

FIELD: machine building.

SUBSTANCE: friction bearing (1) consists of upper case (3) having lower circular surface (2), lower case (5) installed on upper case (3) rotating around axis (O) of case (3) and having upper circular surface (4) opposite to surface (2) of case (3), of circular thrust friction bearing (6) positioned at least on external periphery and/or internal surface of space (36). The packing device has multitude of through orifices made at least on external periphery and/or internal periphery of case (5), circular make-up section (34) inserted into multitude of through orifices for making-up to case (3) and flexible thin-wall circular projecting end section (37) made on section (37) and coming into a sliding contact with case (3) so, as to seal at least internal periphery and/or internal periphery of space (36).

EFFECT: high degree of long-term sealing and damping excessive noise.

11 cl, 23 dwg

Friction bearing // 2427732

FIELD: machine building.

SUBSTANCE: friction bearing (1) consists of upper case (3) having lower circular surface (2), lower case (5) installed on case (3) rotating around axis (O) of case (3) and having upper circular surface (4) opposite to surface (2) of case (3), of circular thrust friction bearing (7) positioned in circular space (6) between surface (2) and surface (4), and of packing device (9) on internal periphery of space (6). Packing device (8) has external periphery packing section (61) positioned between case (3) and case (5) so, as to seal external periphery of space (6) and flexible circular lug (62) made on lower surface of section (61) and projecting in direction of conjugated element (seat of spring) abutting against lower surface of case (5).

EFFECT: preventing penetration of dust and rain water into space between lower case and conjugated element and into space between lower and upper cases even at low accuracy of fabrication of conjugated element.

9 cl, 7 dwg

Bearing // 2415318

FIELD: machine building.

SUBSTANCE: bearing (1) consists of core (2), of bush (3) enveloping core (2) and of flexible element (4) positioned between core (2) and bush (3). Packing element (6) is located on at least one end side (5) of bearing (1). This packing element seals flexible element (4) from environment and has one first (7) and second (8) packing sections. Also, first packing section (7) pressure tight adjoins core (2), while second packing section (8) adjoins bush (3).

EFFECT: improvement of beating due to protection of flexible element of bearing from dirt penetration.

9 cl, 4 dwg

FIELD: machine building.

SUBSTANCE: bearing (LAG) for bearing support of torsion spring (DSF) in roll cushioning system of rail transport facility consists of split bushing (LAB) and of split insertion (LAS) enveloping bushing (LAB) and connected to body of railcar/carriage (WAK/DGS). Also, packing couple (ADI, IDI) is located at least on one end of bearing (LAG). This couple consists of internal elastic packing (IDI) arranged on torsion spring (DSF) and external elastic packing (ADI) arranged on insertion (LAS) of bearing (LAG). Each packing of the couple contains at least one circumferential packing face (DI1, DI2; DAL), while interaction of packing faces facilitates packing.

EFFECT: increased service life due to reduced penetration of moisture and dirt and reduced probability of wedging; reduced time for assembly.

7 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: invention is related to design of roller journal bearing located on the side of sealing barrel. Design (1) of roller (2) journal bearing located on the side of sealing barrel comprises journal bushing (3) installed on roller journal (2), and bushing is matched with rotary ring (5), bearing bushing (7) is installed in bed (6), radial seals with radial jaw pieces (13, 13') matched with bed (6) via holder (11), which interact with rotary ring (5), and sealing system (16), which is installed relative to roller barrel (4). Holder (11) and radial jaw pieces (13, 13') are arranged as a whole in the form of sealing element (8) and form together with sealing jaw piece (15) of sealing system (16) single unit, which is detachably tightly fixed to bed (6). Sealing system (16) comprises L-shaped profile (17), which is mounted on end side (18) of roller (4). There is labyrinth (19) formed between shelves of L-shaped profile (17) and sealing element (8). Sealing jaw piece (15) tightly abuts shelf of L-shaped profile (17).

EFFECT: improvement and optimisation of sealing device so that it is efficiently manufactured and operated, consists of only small number of parts and provides for better sealing action.

12 cl, 4 dwg

The invention relates to the field of rolling mills, and more specifically to a sealing nodes supports rolls of rolling mills

The invention relates to mechanical engineering and can be used in rolling mills to seal bearings

The invention relates to the field of rolling mills, and more specifically to the structure of the sealing device bearings
Sliding element // 2521854

FIELD: machine building.

SUBSTANCE: invention relates to sliding element used, for example, as a plain bearing in internal combustion engines, plain bearing of crankshafts, piston rings or piston skirts. A sliding element comprises a bottom layer and at least one layer made from the sliding facilitating material applied onto the bottom layer. The layer of sliding facilitating material consists of varnish containing at least one binder able of linking or at least one high-melting thermoplastic material, and containing Fe2O3. The share of Fe2O3, in terms of total volume of material in the sliding facilitating layer, amounts to 0.1 to 15% by volume. The microroughness of the bottom layer Rz falls within the range from 1 to 10 mcm.

EFFECT: development of a sliding element with its coating subject to high loads having a plastic matrix containing Fe2O3 and being highly adhesive to the bottom layer at simultaneous increase of maximal load.

28 cl, 2 tbl

Bush (versions) // 2516930

FIELD: machine building.

SUBSTANCE: invention relates in general to corrosion resistant bushes which can be used in automotive industry, namely, for hinges of doors, bonnets and engine compartments, seats, steering columns, flywheels, bearings of balancer shaft etc. as well as in other industry branches. The bush comprises: a load-bearing underlayer (102) having the first basic surface, the second basic surface and edges; a sliding layer (110) connected to the first surface; a corrosion resistant layer (114) connected to the second surface and passing so that to cover the edges of the load-bearing underlayer (102). The corrosion resistant layer (114) comprises a layer of epoxy resin (118) including a hardener. Distinction of the bush as per the second version consists in the fact that its nominal corrosion resistance measured according to ISO 9227:2006 amounts to at least 120 hours.

EFFECT: production of an improved bush requiring no maintenance, having extended service life without maintenance and increased corrosion resistance.

14 cl, 10 dwg

FIELD: transport.

SUBSTANCE: proposed bearing 1 has top housing 3 made from synthetic resin with seat surface 10 for mount device 9 arranged on car body side and annular bottom surface 2, bottom housing 5 made from synthetic resin and annular thrust plain element 6 from synthetic resin. Annular top surface 4 is made integral with bottom housing 5 opposite surface 2, and seat surface 25 of suspended cylindrical spiral spring 7. Said housing is fitted on top housing 3 to rotate about axis O of housing 3 in direction Z. Thrust plain element 6 is arranged in annular clearance between surface 2 and surface 4 and features annular thrust surface sliding to thrust against surface 2 or surface 4. Mount surface 10, working surface and part of surface 25 where against thrusts spring 7 are fitted on bearing axle 1.

EFFECT: efficient bearing to reduce load from car body.

8 cl, 11 dwg

FIELD: transport.

SUBSTANCE: plain thrust bearing (1) made of synthetic resin contains upper body (100) of synthetic resin, lower body (200) of synthetic resin and plain thrust bearing made of synthetic resin assembly (300), fitted between bodies (100) and (200). If to take radial length of body (100) from axis (o) to outer edge surface (303) of the assembly (300), located in lower ring cavity (205) as (r), and thickness of inner edge surface of upper ring plate section (102) as (t), on the upper surface (108) of body (100) there is ring flat surface (109) with circular outer edge, the radius (R) of which, if to take axis (o) of body (100) as centre of circumference, is equal to R=r±t. The thrust bearing (1) is located between lower surface of mounting element at the side of vehicle body and upper surface of spring upper socket, subtending to this lower surface. Due to this, the surface (109) only contacts with lower surface of mounting element at the side of vehicle body.

EFFECT: creation of plain thrust bearing which even under action of variable load such as tilt on mounting element at the side of vehicle body provides smooth operation of steering without interference of upper and lower bodies; higher operation efficiency due to possibility to maintain friction characteristics for a long time.

9 cl, 13 dwg

Plain bearing // 2463492

FIELD: machine building.

SUBSTANCE: proposed bearing comprises shaft journal 1 and sleeve 2 made from polymer material enveloping eccentrically said shaft 1 Besides, bearing comprises, at least, one extra heat transmitting body 3 in contact with shaft journal and provided with cooling system 5. Note here that said heat transmitting body 5 may be made of solid of revolution, e.g. cylinder.

EFFECT: longer life.

2 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: proposed material comprises rolling layer with slippery material, stable-size bearing layer and elastic layer. Elastic layer comprises elastomer produced by the process including the following steps. Using rolling layer with slippery material, stable-size bearing layer and elastic layer, every said layer representing sheet material, particular, continuous strip. Jointing slippery layer to said bearing layer and elastic layer to bearing layer on the side opposite the slippery layer. Or using slippery layer, bearing layer and elastic layer. Note here that said layer represents sheet material, particular, continuous strip. Besides, it comprises jointing slippery layer to said bearing layer and elastic layer to bearing layer on the side opposite the slippery layer.

EFFECT: 3D-geometry bearings with nice noise- and vibration killing properties.

17 cl, 15 dwg

FIELD: mechanics.

SUBSTANCE: invention relates to a plain thrust bearing from synthetic resin, in particular, for thrust bearing suspension rack-type four-wheeled vehicle. The bearing has an upper housing (100), comprising an radial flat spot (102), lower body (200) superimposed on the body (100) with possibility of rotation around the axis of the housing (100) and contains an radial flat spot (202), opposite the site (102 ), and an radial groove (204), performed at the site (202), which is surrounded by the first (203) and second (205) concentric radial projection housing (200). The bearing assembly also includes a node of (300) plain thrust bearing made of disc (304), which is placed in the radial groove (204), is a sliding contact with an radial flat spot (102) and has a circular hole (101), done in the central part . At the same node (300) mounted in an radial groove (204) with an radial gap (AI) between the inner peripheral surface (301) round hole (302) and the outer peripheral surface (207) of the first projection (203) and the radial gap (A2) between the outer peripheral surface (303) disk (304) and an inner peripheral surface (208) of the second projection (205). Node (300) is located in a groove (204) so that its upper surface (305) protrudes from the grooves opening (204) so as to enter into contact slider with the bottom surface (105) housing (100), and its lower surface (306) is in contact slider with the bottom surface (209) groove (204). Housing (100) is combined with the housing (200) by the elastic landing on the housing (200). The sum (A) of the volume of radial gaps (AI) and (A2) is less than the amount (B) of the node part (300), which protrudes from the hole of the groove (204).

EFFECT: time preservation of slipping characteristics such as low coefficient of friction and wear resistance.

7 cl, 12 dwg

FIELD: process engineering.

SUBSTANCE: set of inventions relates to plain bearing and method of its production. Proposed plain bearing comprises metal base, intermediate layer applied thereon and antifriction layer applied on said intermediate layer. Said intermediate layer comprises at least one thermoplastic polymer containing functional groups of the formula

.

Note here that R stands for cyclic or linear organic radicals with 1-20 carbon atoms. Note also that functional groups are implanted into thermoplastic polymer by adding at least one modifying agent, namely, toxilic acid and its derivatives, in particular its anhydride and or itaconic acid and its derivatives, particularly, its anhydride, and/or citraconic acid and its derivatives, particularly, its anhydride.

EFFECT: bearing that requires no servicing.

24 cl, 2 dwg

FIELD: construction.

SUBSTANCE: pendulum sliding support (1) is designed to separate soil (2) of the base from a structure (3), for instance, in case of base soil (2) movements caused by an earthquake or as an alternative for traditional deformed supports. The support (1) comprises the first support sliding plate (5) with the first concave sliding surface (5'), a support block (4), being in a sliding contact with the first surface (5'), and also the second support plate (6) with the second concave surface (6'), which contacts with the support block (4). The first sliding surface (5') provides at least in one position a stable position of the support block (4) balance, in which it returns independently after deviation caused by exposure to external forces. Antifriction material (9a, 9b) contains plastic with elastic-plastic compensating properties and with low friction coefficient, at the same time plastic has compensating properties, which make it possible to compensate for deviation of 0.5 mm from the specified plane of the specified sliding surface (5').

EFFECT: increased durability, strength and provision of most accurate return of a sliding element into balance position.

33 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: plain thrust bearing (1) consists of: made of synthetic resin first circular case (5), second circular case (7), circular thrust surface (11) corresponding to unit of plain thrust bearing; and strengthening element (10) made of sheet metal. Case (5) has upper circular surface (2) and lower circular surface (4). Case (7) is superposed on case (5), rotates around axis (O) of case (5) and has lower circular surface (6) opposite to surface (2) of case (5). Reinforcing element (10) has lower circular surface (8) contacting surface (2) of case (5) and upper circular surface (9) opposite to surface (6) of case (7). Unit of the plain thrust bearing is positioned between surface (9) of reinforcing element (10) and surface (6) of case (7). Also, lower circular surface (97) and circular surface (96) of the plain trust bearing are in sliding contact correspondingly with surface (9) of reinforcing element (10) and with surface (6) of case (7). Surface (4) of case (5) encases one end of a cylinder spring.

EFFECT: avoiding anti-corrosion means, simplification of pole assembly, reduced expenditures and elimination of rigid interference.

4 cl, 6 dwg

Gas turbine engine // 2529294

FIELD: engines and pumps.

SUBSTANCE: first cup-like journal of the first magnetic bearing assembly directed by its bottom to turbine wheel is fitted on engine cylindrical bush adjoining the turbine wheel. Note here that second cup-like journal of the second radial thrust magnetic bearing directed with its bottom to compressor wheel is fitted on the shaft free end. First and second thrust gas bearings, centrifugal compressor wheel and equaliser washer are fitted thereon and locked by nut. Every radial magnetic bearing comprises thin-wall sleeve made of nonmagnetic material. Sleeve outer surface has poles arranged regularly in circle and shaped to trapezoid-like strips made of material with high magnetic permeability. Trapezoid-like strips made of magnetic material arranged between the latter to contact with said poles by side faces. The latter magnetised over axial length in tangentially opposite direction. Wide cross-section base of magnetic strips face the thin-wall surface. Wedges made of strips of nonmagnetic materials are arranged on narrow base side rigidly secured flush with side faces of the poles. Said wedges contact with magnetic strip to make the cylindrical surface extending in working clearance of radial magnetic bearing. Circular ledges of the first and second cup-like journals are fitted in circular recesses. Said ledges are furnished with ring of high-strength fibre on binder made of solidifying synthetic resin. Said ledges are fitted in appropriate ring grooves made in spacer arranged between turbine and compressor casings. Note here that one of ring grooves is opened to compressor while another to turbine. Corrugated sleeve with lengthwise crimps is arranged between the surface of ring grooves and made of resilient material. Inner surfaces of cup-like journal is coated with copper layer and finished to high purity. Thrust magnetic bearing comprises toe bearing made of nonmagnetic material and arranged in cylindrical bore of cup-like journal. Sectors of poles of material with high magnetic permeability are secured between journal bottom and toe bearing surface. Sectors of permanent magnets and sectors of poles are composed by trapezoidal-section strips in contact by side edges. Note here that magnetic sectors face the cylindrical recess bottom by their section wide base. Their narrow bases are covered by flat wedges of nonmagnetic material. Their end surfaces are rigidly secured with end surfaces of appropriate poles to make flat surface which makes with cup-journal the working clearance of thrust magnetic bearing. Radial and thrust magnetic bearings are made of magnetic material with Courier point not lower than 900°C. Elastic washer made of resilient material deformed to make circular crimps is arranged between toe bearing and bottom of bore of both magnetic bearings. Magnetic radial and thrust bearings are locked in place. Axial gas-dynamic bearing comprises spacer and seal with spacer ring arranged there between. Note that first and second thrust gas bearings separated by common toe bearing are fitted there between. Radial gas-dynamic bearing is arranged in clearance between the spacer cylindrical cavity and sleeve surface facing the latter.

EFFECT: reliable starting at low temperatures, higher reliability at high dynamic loads and operating efficiency.

2 cl, 6 dwg

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