Front friction heating bearing with registration of its operation regimes

FIELD: machine engineering.

SUBSTANCE: thrust bearing oil film to the registration of its operating modes comprises an annular heel (8) and an annular thrust bearing (10) disposed in the housing (11) of the machine. Heel (8) has a smooth work hardened surface, while the thrust of the working surface (10) are protruding rollers (13) of the small needle martensite friction, side surfaces of which form wedges together with the heel (8). Rollers (13) are arranged on the working surface radii, spaced apart at a distance L = (1.5÷3) h at the minimum diameter of thrust bearing (10), where h - the width of the bead (13). The spherical annular thrust bearing surface zone (10) between the working side rollers (13) are located "abradable thermocouple" (15) protruding above the surface of the thrust bearing (10) by an amount equal to the height of the cylinder (13).

EFFECT: creation of the thrust bearing fluid friction, which allows very quickly to register the temperature in the contact zone between the heel and thrust, instantly diagnose its operating modes - fluid friction and mixed friction.

4 dwg

 



 

Same patents:

FIELD: machine building.

SUBSTANCE: preliminary a rod is made by pressing and sintering of the composition containing copper powder, PTFE powder and ammonium chloride. To the work surface of the part a composition is applied containing 1…3 wt % of copper chloride in glycerine. Then the rod is put in friction contact with the work surface of the part with sliding speed 0.06…0.09 m/s at longitudinal feed rate 50…80 mcm/rev, pressure 30…50 MPa, and number of passes 4…6. The obtained coating is passivated, then lubricating composition based on soap plastic lubricant comprising copper powder and PTFE powder is applied. At that prior to the lubricating composition application it is preliminary heat treated in inert gas by pressing-through 3…5 times under pressure via the gap between external and internal cages of the heated and installed in series roll bearings.

EFFECT: increased antiwear properties of the coating and antifriction properties upon increased durability of the coating.

1 tbl

Friction surface // 2541596

FIELD: machine building.

SUBSTANCE: friction surface (1) of part (2) has regular relief in form of cavities (3) acting as lubricating tanks for the surface applied lubricant (4). Surface of cavities (3) is covered with layer of the material (5) having lower adhesion properties in relation to the used lubricant (4) in comparison with the friction surface (1).

EFFECT: higher efficiency of lubrication.

2 dwg

FIELD: wood working industry.

SUBSTANCE: plain bearing is made from compressed impregnated wood with a radial arrangement of fibres and uniform density along the whole section and contains greasing in amount 7-8% from the wood mass, and metal inclusion. The wood of the bearing contains nano-crystalline cellulose in the amount 0.5-0.8% from the wood mass, and the metal inclusion is implemented as a continuous nickel film in amount 4-6% from the wood mass with the width 0.8 mcm, covering internal surface of wood completely. The method of manufacture of the named plain bearing is also offered which comprises the manufacture of segments (4) of compressed impregnated wood with a radial arrangement of fibres and radiuses of rounding of the future bearing, application of glue, installation into auxiliary cartridge clip (1), pressing through a cone (2) with a cone angle (2), allowing to increase a density up to the value 1350 kg/m3 minimum, glue solidification and, if necessary, machining job along an internal diameter with a minimum rough tolerance.

EFFECT: improvement of quality of a plain bearing and decrease of manufacture complexity.

2 cl, 6 dwg, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to application of CuFe2P in sleeve bearing or as material of sleeve bearing, with CuFe2P representing copper alloy, which contains 2.1-2.6 wt % Fe, 0.05-0.2 wt % Zn 0.015-0.15 wt % P, to 0.03 wt % Pb and to 0.2% of other additives. Invention additionally relates to composite material (1) of sleeve bearing, which contains support layer (2) and bearing metal layer (3) based on CuFe2P with Fe2P particles formed on it (4).

EFFECT: creation of sleeve bearing material, which has advantages of copper-based materials, in which it is possible to refuse from application of lead and which has good workability and excludes bearing cramping, in addition, material of sleeve bearing was easily produced and applied on usual support layers, with application of CuFe2P resulting in sleeve bearings with high heat conductivity and good mechanic properties.

11 cl, 2 dwg, 2 tbl, 2 ex

FIELD: engines and pumps.

SUBSTANCE: set of inventions relates to ICE sliding parts. Proposed part comprises substrate with coating thermally deposited thereon and exposed contact surface including at least two different-strength two-phase-material coating. Note here that at least one of coating phases of lower strength is recessed relative to the other coating phase. Making of the part includes preparation of substrate, thermal deposition of coating with exposed contact surface to recess at least one of material phases relative to the other phase. Note also that lower-strength coating material is recessed.

EFFECT: optimum tribological properties.

20 cl, 1 dwg, 1 ex

FIELD: machine building.

SUBSTANCE: sleeve is made from composite polymer anti-friction material on the basis of polyamide containing carbon fibre or a mixture of carbon fibre with glass fibre as a fibrous filler. In addition, the material contains chaotic carbon nanotubes in the form of single-layer, multi-layer graphite planes with the number of layers of 2 to 70 or inserted into each other and bent into a tube; outside diameter of carbon nanotubes is 0.1 to 100 nm, and their length is 1 to 70 mcm. As a base, the material also contains polyamide mixture with 20-40 wt % of polyethylene caproamide. As material base polyamide, there used is polyamide 6, or Kaprolon B or Ertalon; content of fibre glass in its mixture with carbon fibre of fibrous filler of composite polymer anti-friction material is 3.48 to 10.5 wt % at the following component ratio, wt %: carbon fibre or a mixture of carbon fibre and fibre glass 9.7-42.4; carbon nanotubes 0.05-0.55; polyamide is the rest - up to 100%.

EFFECT: increasing sleeve service life due to considerable reduction of intensity of linear wear of a working layer of sliding at friction on polished steel pair from steel 40X, increasing stability of friction coefficient at friction on the material of counter body from steel 40X, and improving breaking stress at tension, preserving Charpy impact strength on specimens without any notch at simultaneous maintenance of the specified limit of compressive strength, as well as low friction coefficient at increase of its stability.

4 cl, 2 tbl

FIELD: process engineering.

SUBSTANCE: invention relates to powder metallurgy, particularly, to production of wear-proof antifriction self-lubricating alloy with larger amount of alloy. Pulverised powders of Al-40Sn-composition are pelletised and sintered in inert atmosphere at 590-615°C for 90-30 min. Sintered pellet is subjected to equal-channel angular extrusion at invariable position of deformation plane.

EFFECT: high mechanical and tribotechnical properties at steel friction in the absence of lubrication.

7 dwg

FIELD: machine building.

SUBSTANCE: sleeve is made from composite polymer antifriction polyamide-based material containing a mixture of carbon fibre and glass fibre, as well as a powder filler as a fibrous filler. As a material base, it contains polycaproamide or mixture of polycaproamide with 20-40 wt % of polyethylene caproamide. As carbon fibre, the material contains carbon fibre obtained from high-molecular hydrocellulose fibre; content of glass fibre in the mixture is 3.48 to 10.5 wt %. As powder filler, the material contains colloid-graphite solution with particle sizes of 400 to 4000 nm, or silicon oxide in the form of marshalite or colloidal silica with particle sizes of 400 to 8000 nm. Sleeve material contains components in the following ratio, wt %: mixture of carbon fibre and glass fibre 28.5-43.0; powder filler 1.4-3.2; mineral oil 1.0-2.0; polymer matrix is the rest (up to 100%).

EFFECT: increasing sleeve service life due to considerable reduction of intensity of linear wear of a working layer of sliding at friction on polished steel pair from steel 40X, increasing stability of friction coefficient at friction on the material of counter body steel 40X, and improving Charpy impact strength on specimens without any notch at simultaneous maintenance of low friction coefficient and the specified limit of compressive strength.

6 cl, 2 tbl

FIELD: machine building.

SUBSTANCE: proposed antifriction coating comprises molybdenum disulphide and binder. Said binder represents organic silicon compound. Diamond nanoparticles are additionally introduced in coating composition.

EFFECT: higher operating temperatures and wear resistance.

5 cl, 1 ex

FIELD: machine building.

SUBSTANCE: method for manufacturing anti-friction layer of sleeve half-bearing consists in oversized boring after sleeve casting and its plastic deformation. Plastic deformation is made within the range of recrystallisation temperature of matrix alloy phase, but not exceeding the temperature of melting of disperse phases at average speed of deformation 10-2≤ε≤10 s-1. Deformation is made in several transitions with changing of direction by transitions to opposite one. Deformation is done by tool, the material, thermal processing and roughness of which corresponds to the material of shaft neck joined with the bearing.

EFFECT: increase of product wear-resistance due to creation of small grain structure of top layer, provision of positive gradient of mechanical properties by depth, reduction of surface roughness due to smoothing microroughnesses by breaking-in roller and reduction of material wearing-in period.

3 cl, 1 tbl, 1 ex

FIELD: machine building.

SUBSTANCE: invention relates to segment patch pieces of thrust plain bearings cooled by water at which at least one of the working surfaces is made from silicified graphite used mainly in electric motors that serve as the drive for main circulation pump units at NPP. A separating channel providing for the circulation of a lubricating and cooling medium on the whole contact surface, is made on the contact surface of the patch piece along the bearing radius. The separating channel divides the contact surface on the lead-in edge side up to the channel and the surface after the channel up to the exit edge with the proportion of at least 3 to 2.

EFFECT: provision for more efficient heat removal from the contact zone at the operation of the proposed structure of the patch piece being the part of a thrust plain bearing of the main circulation pump unit at NPP, reduced risk of damage to antifrictioin elements from silicified graphite from thermal deformations due to uneven heat removal from the contact zone, improved manufacturability of patch pieces of stator elements of the large-sized thrust plain bearing, provision for the repairability of patch pieces of the thrust plain bearing and lower risk of fire.

3 cl, 4 dwg

FIELD: machine building.

SUBSTANCE: invention relates to machine building, namely, to a plain thrust bearing as well as to a combined device of the plain thrust bearing and a piston rod. The plain thrust bearing comprises a casing from artificial resin, a circular cover, a circular metal plate and a plain thrust bearing assembly. The casing includes a hollow cylindrical part with a cylindrical inner edge surface forming a through hole, a circular collar part which, as a solid unit, branches off in the radial direction outwards from the cylindrical outer edge surface and the hollow cylindrical part. The circular cover is fitted by a disk part with inner edge surface forming a through hole which is concentrical to the through hole in the bearing casing. The circular metal plate is fitted by an outer disk part turned in the radial direction outwards, the upper circular surface of the said disk part touches the lower circular surface of the disk part of the circular cover. The plain thrust bearing assembly is set between the bearing casing and the lower circular surface of the outer disk part of the circular metal plate. The combined device of the plain thrust bearing and the piston rod comprises the plain thrust bearing and the piston rod of a hydraulic damper.

EFFECT: improved design.

14 cl, 18 dwg

FIELD: machine building.

SUBSTANCE: plain thrust bearing from the synthetic resin. The bearing contains top casing out of the synthetic resin, bottom casing, thrust bearing assembly from the synthetic resin, outside resilient sealing element and internal resilient sealing element. The thrust bearing assembly from the synthetic resin is installed between top casing and bottom casing.

EFFECT: increased bearing protection against dust and dirty water ingress.

9 cl, 12 dwg

FIELD: machine building.

SUBSTANCE: invention relates to the plain thrust bearings from synthetic resin, namely, to the plain thrust bearings used in post-type suspensions (McPherson suspension) for four-wheeled vehicles, and also to the mounting design of the post-type suspension with the plain thrust bearings. The plain thrust bearing (1) comprises a lower housing (2) from synthetic resin, upper housing (3) from synthetic resin laying on the lower housing (2), and an insert (4) from synthetic resin placed between the housings (2, 3). The upper housing (3) is laid on the lower housing (2) in such a manner that the tubular outer surface (34) of an internal tubular suspended part (29) of the circular bearing parts (25) is located opposite to the tubular internal surface of the larger diameter of the circular bearing part (11) of the housing (2) with a clearance between them. Meanwhile the circular lower end surface of the part (29) is located opposite to the surface with a circular shank shoulder of the part (11) with the clearance between them. The cylindrical internal surface (31) of the external tubular suspended part (32), with the walls wider, than ones of the part (29) in a radial direction, forms a sliding contact with the cylindrical outer surface (9) of the part (11). The internal tubular vertical part (38) of the wall is located in the circular part (18) with the recess. The circular hook part (44) is elastically seats in a circular gripping protruding part (20), as a result of which between the elastically seated part and the smoothly contacting part of the surface (9) an sealing part of the labyrinth type is formed with reference to the cylindrical internal surface (31) due to that the part (38) of the wall is located in the part (18), and the tubular protruding part (19) and the part (20) are located in the circular part (42) with the recess.

EFFECT: creation of plain thrust bearing with a possibility of resolving the problem with the space for mounting.

2 cl, 8 dwg

FIELD: machine building.

SUBSTANCE: thrust bearing unit consists of a thrust plate and a thrust journal (7). The thrust plate is composed of housing (1) with cylindrical recess and flat bottom formed by circular ledge (2) along the perimeter of the housing (1). At the bottom of the cylindrical recess there are sectors of the elastic gasket (3) with the gasostatic bearing sectors (5) supported on them, bearings, which are forming, respectively, the elastic gasket ring (3) and the ring from non-magnetic material. The side of sectors (5), facing towards the thrust journal (7), is fitted with a recess with flat bottom formed by beads (8) along the perimeter of the sector (5). In the recess of each sector (5) several sectorial permanent magnets magnetised in an axial direction, and contacting with them sectorial permanent magnets, magnetised in a longitudinal direction are evenly distributed along a circle and fixed. The cross section of cover plates (6) is T-shaped. The external surface of sector permanent magnets form a single plane facing towards the thrust journal (7), made from non-magnetic material, with forming with it of working clearance (12). In volume of sectors (5) the system of interconnected channels of small diameter with a possibility of feeding in it of compressed air from the external source is implemented, the output holes of which are connected with viaholes (20, 21), made in sectorial permanent magnets interconnecting with the working clearance (12).

EFFECT: ensuring of high bearing capacity of a thrust bearing assembly in an operating mode, reliable start of turbine, decrease of deformation of clearance in the thrust bearing assembly as a result of high pressure of gas pressurisation, damping of oscillations of turbine machine rotor, caused by axial gas dynamic forces of the turbine and compressor.

6 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: invention relates to the thrust journal bearings, which one work surface is out of siliconised graphite (or other antifriction material with similar characteristics), and can be used in assemblies of the electric machines and hydraulic machines with large-size thrust bearings (diameter up to 900mm), mainly in motors driving the main circulating pump units of the reactor plants, for example at NPS. The feature of the mentioned axial bearing is that the support disc if made with alternating supporting shoulders and grooves from the side looking towards a set of sectors out of antifriction material. On outside and internal diameters of the supporting disc the seating surfaces are made, the outside and internal rings are installed in them and secure the sectors via the resilient elements. The sectors locking against rotation relatively to the supporting disc is ensured by the intermediate planks installation between the sectors, they are locked by the plank axle in holes of the supporting disc. The sectors are made with steps for outside and internal rings, the sector top part has radial roundings, and bottom part has grooves ensuring mutual securing. Lead-in edge of the sector has shape similar to parabolical shape. Cooling and lubrication are performed via the alternating channels created by the planks, sectors, outside and internal rings.

EFFECT: decreasing of possibility to damage the antifrictional components out of siliconised graphite due to bend stresses and thermal deformations due to non-uniformity of heat removal from the contact zone when solid gusset is used; improvement of the cooling and lubricating water circulation on crown surface of the axial journal bearing; improvement of feasibility of the gusset manufacturing and assurance of its reparability; reliability improvement; fire risk decreasing; rotation prevention of the set of sectors over the supporting disc.

3 cl, 8 dwg

FIELD: machine building.

SUBSTANCE: thrust bearing assembly consists of axial bearing and thrust bearing (7) made of nonmagnetic material. Axial bearing is composed of housing (1) with cylindrical recess and flat bottom formed by circular ledge (2) extending over perimeter of housing (1). Resilient washer (3) is arranged on cylindrical recess bottom with ring-shape gas bearing resting thereon and made of nonmagnetic material and separated to sectors (5) by radially directed straps (6) of the same thickness secured to housing (1). Flange (8) making the recess is arranged at perimeter of sector (5), on the side facing the thrust bearing (7). Recess of every sector (5) locked are sector poles of high magnetic permeability material with sector permanent magnets (9, 10) with tangential opposite magnetisation located there between. Cross-section of washers (6) is shaped to T shape, their flanges being arranged to engage the radial collars (8). Magnets (9, 10) are shaped to trapezoids with their wide base facing the recess surface while narrow base of every magnet (9, 10) contacts with wedge (14) made of strip of nonmagnetic material and rigidly secured with adjacent sector poles (12, 13). Outer surface of wedges (14) and poles (12, 13) make a single plane to form therewith a working clearance (15). Inside said sectors (5) a system of communicating channels (18) is made to feed compressed air therein from external source, system outlets being connected with through holes in poles (12, 13), connected in their turn, with working gap (15).

EFFECT: higher bearing capacity under working conditions, reliable start and outage of turbomachine.

7 cl, 5 dwg

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

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

Thrust bearing unit // 2529070

FIELD: machine building.

SUBSTANCE: thrust bearing unit consists of a thrust plate and a thrust journal (8). The thrust plate is formed by a casing (1) fitted by a cylindrical groove with flat bottom which is provided by a circular protrusion along the casing (1) perimeter. A resilient gasket (3) is set on the cylindrical groove bottom and a gasostatic bearing rests against it and is made as a ring divided into sectors (5) by oriented metal nonmagnetic patchs (7) coupled with the thrust plate casing. On the side turned to the thrust journal (8) the sector (5) perimeter is fitted by a bead (9) providing for the groove. Gasostatic bearing (6) steps made from antifriction material are fixed in the groove of each sector (5). The patch (7) cross section is of T-shape, the tables of the patchs (7) are made so that radial beads (9) of the sectors (5) can be engaged. External surface of the gasostatic bearing (6) steps is turned to the thrust journal (8) and form an operating clearance with it. In the sectors there provided is a system of communicating channels (12) with the possibility of supplying compressed air to it from an external source, the outlet holes of the system are communicated with the feeding holes (18) in the gasostatic bearing steps, through holes communicating with the operating clearance.

EFFECT: increased carrying capacity of a thrust bearing unit in the operation mode with reduced friction losses in it, decreased deformation of clearance in the thrust bearing unit resulting from the high-pressure of gas blowing, damping of vibrations of a turbomachine rotor caused by axial gas dynamic forces of the turbine or compressor, reliable start-up and shutdown of the turbomachine.

3 cl, 3 dwg

Thrust bearing // 2269682

FIELD: mechanical engineering.

SUBSTANCE: invention can be used in turbomachines, for instance, in turbocompressors, and also as repair set. Proposed thrust bearing has housing, bushing with bead freely fitted into housing space and fixed from rotation by section of bead in form of polyhedron and arranged in congruent cavity on end face of housing pointed to polyhedron. Longitudinal lubrication grooves are made in space of bushing whose spaces are connected through channels with outer surface of bearing housing. Bushing is made sectional, consisting of two parts, each provided with bead with fixing section in form of polyhedron. Both end faces of bearing housing are provided with cavities congruent to fixing sections of bead. Clearance is left between end faces of bushing arranged in space of bearing housing.

EFFECT: increased damping properties of bearing in axial and radial directions.

4 cl, 2 dwg

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