Axial journal bearing

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

 

The invention relates to thrust bearings, in which at least one of the working surfaces made of siliconized graphite (or other antifriction materials with similar characteristics). The main field of application are the corresponding structural components of electric machines and hydraulic machines with roller bearings large size (diameter up to 900 mm), mainly the electric motor serving as a drive for main circulation pump units (type gcna) and the main circulation pumps water-cooled reactor plants, for example in nuclear power plants (NPP). Siliconized graphite (as antifriction bearing material) is characterized by the temperature resistance (at least up to 300°C) and allows the use instead of butter water as coolant. This solution is used in radial and thrust bearings of centrifugal pumps, members of the main pumping units.

However, due to the fragility of the lower coefficient of linear expansion than the metal, the complexity of the manufacturing process of lining in the form of a single part with maximum overall size 900 mm and ensure uniform and effective heat removal from the zone of friction when using solid lining makes it impossible to obtain plates for the thrust needle bearing is an example of the slip large diameter is used as an antifriction material siliconized graphite, lubricated and cooled by water.

Known axial bearings for powerful steam turbines (Serezhkin L. P., Zaretsky, E. I. Axial bearings powerful steam turbines. Engineering, 1988, page 39...41) mounted on the shaft with a comb, moving between the two sets of pads with the leveling lever system Kingsbury, using as a cooling and lubricating liquid oil.

A disadvantage of the known bearings, using as a cooling and lubricating liquid oil is an increased fire risk equipment of nuclear power stations, including the main coolant pumps operating in the unattended location. To ensure fire safety is required transition to a non-flammable lubricant-coolant-water. The transition to water will require design changes, in particular the installation of the crest lining with anti-friction material efficient at cooling and lubrication water.

Known thrust bearing (U.S. Pat. RU # 2242645, F16C 17/04, publ. 15.07.2003,), comprising a housing and mounted on the shaft crest of the flange on the supporting surface is set to the hard disk, and between the body and disc is the node with tilting pads, fitted with anti-friction pads in contact with the disk is on their bearing surfaces, includes fixed on the working surface node with tilting pads and anti-friction pads clamping ring with Windows (separator) for anti-friction pads, made in the form of liners and freely located in the Windows of the clamping ring, and a working surface anti-friction liners protrudes from the end surface of the clamping ring. The thrust washer is made in the form of a solid anti-friction rings. Anti-friction liners made in cross-section of stepped form, with steps keep inserts from falling out of the Windows of the clamping ring.

A disadvantage of the known thrust sliding bearing is used on the flange (crest) of the disk as a solid anti-friction rings made in monoblock, which is impossible in the case of a sliding bearing large size (up to 900 mm in diameter). In addition, the alignment of the loads in the contact zone due to the spring in the axial direction of the ring with inserts made of antifriction material is impossible in the axial sliding bearing at high unit loading.

Known thrust bearing unit slip (U.S. Pat. RU # 1745004, F16C 17/04, publ.28.02. 1994), comprising a housing and a shaft with a flange, a support surface which has a disk with annular projections and between korponai drive self-aligning pads with contact with the disc on their working surfaces.

This is a known technical solution, providing thrust sliding bearing with high specific loads with the use of anti-friction linings of siliconized graphite, when used as coolant water, has the disadvantage of not aligning specific loads on self-aligning sector and the availability of erosion damage from hydrodynamic flow effects smazochno-coolant with long-term operation of the axial sliding bearing large size.

The problem solved by the invention consists in forming the pad contact surface of the comb shaft with a defined axial sliding bearing of large dimensions, with lever leveling system Kingbury, using siliconized graphite (or other materials with similar characteristics) as antifriction material in terms of cooling and lubrication of the bearing water corresponding to the operation of the main pumping units at the plant.

When implementing the present invention can be obtained from the following technical results:

- reducing the possibility of damage to the antifriction elements of siliconized graphite from bending stress and thermal deformation due to uneven heat transfer from the ons contact when using continuous forms overlay;

- improving the circulation of cooling and lubricating water on the surface ridge axis sliding bearing;

- improvement of manufacturability lining the crest of the axial sliding bearing large size;

- ensuring maintainability lining the crest of the axial sliding bearing large size;

- improved reliability;

- reduction of fire hazard;

prevention of rotation of the set of sectors on the support disk.

As a solution, which allows to achieve the effect with these characteristics, it is proposed axial sliding bearing, comprising a housing and a shaft with a flange, a support surface which has a disk with annular projections and between the housing and the disk is self-aligning pads with contact with the disc on their working surfaces, self-aligning pads, fitted with anti-friction pads on the supporting surface of the disc is made of two annular ledge, and on its working surface mounted anti-friction segments, according to the invention proposed reference disk to perform with alternating support belts and grooved side facing the set of sectors, internal and external diameters of the supporting disc to perform a landing surface that have inner and outer rings that secure the sec the ora of antifriction material via elastic elements, fixation of sectors from rotation relative to the reference disk to perform the positioning of the intermediate strips between sectors, which are fixed axis of the strap into the holes of the supporting disc,

sector of antifriction material to perform with steps under the outer and inner rings, at the top of the sector to perform radius of curvature, at the bottom of the grooves, providing a mutual axial fixation, edge boards sector to perform a form close to parabolic,

while cooling and lubrication to perform on alternating channels formed straps, sectors, internal and external rings.

Preferably, the mounting plates to the comb to perform in the interval between the supporting corbels bolts or screws with locking from samootvinchivaniya.

Preferably, sector perform from siliconized graphite or silicon carbide.

Technical results are achieved as follows.

To reduce the possibility of damage and transmission at work bending deformation and thermal deformation from the crest on the sector of siliconized graphite (or other material with similar characteristics) support disc contains on the surface facing the ridge, the supporting belts made in the area close to the centre of equilibrium of the internal and external surfaces of the CE is tori from siliconized graphite.

To prevent rotation of the set of sectors in the supporting disc at work every sector is now the side surfaces of the intermediate slats mounted between the sectors. Laths are fixed relative to the reference drive axle straps installed in the hole of the supporting disc, in the particular case, the sector can separatist rotation groups, the locking is performed straps having fastening axis and set at the beginning and end of a group of sectors. Strap together with (profiled) sectors of siliconized graphite (or other material with similar characteristics) and external and internal retaining rings form the channels, thereby providing the improved circulation of cooling and lubricating water on the contact surface of the ridge axial sliding bearing.

Using the set of sectors of siliconized graphite (or other antifriction material with similar characteristics) provides improved manufacturability lining the crest of the axial sliding bearing large size.

The possibility of replacing individual sectors of the pads in the process of manufacture and operation ensures maintainability lining the crest of the axial sliding bearing large size.

To reduce the risk of fire equipment is of nuclear power plants, including main coolant pumps operating in unattended premises, use non-flammable cooling and lubricating liquid, water, and install over the top of the lining with anti-friction material, efficient cooling and lubrication water.

The invention, in the particular implementation illustrated by drawings:

Fig. 1 is an axial sliding bearing;

Fig. 2 - plate axial sliding bearing - General view;

Fig. 3 - channels plates - type B (Fig.2);

Fig. 4 - cover - section a-a (Fig.2);

Fig. 5 - sector overlays - General view;

Fig. 6 - sector lining - side view (Fig.5);

Fig..7 - Planck pads - General view;

Fig. 8 - strap overlay - type G (Fig.7).

The axial sliding bearing large size made in the housing (not shown), is installed on the crest of the shaft from moving between the two sets of pads, with the leveling lever system Kingbury located between the housing and the support plate 1, the ridge 26 and installed plates 27 (Fig.1). Plate 27 (Fig.2) includes a supporting disk 1 (Fig.4) made in the form of a ring with a bore surface at the inner diameter.

From the side adjacent to the set of sectors (Fig 4), the reference disk 1 is made with the surface in the form of alternating grooves 2 and the supporting belts 3, creating necessary conditions coloring strength and for siliconized graphite, reference conditions, while ensuring the minimum area of the processing surface of mutual contact.

From the side adjacent to the flange 26, the supporting disk 1 is made with two supporting bands 4 (Fig 4), located in the area close to the centre of equilibrium of the internal and external surfaces of the sectors of siliconized graphite to reduce the possibility of damage and transmission at work bending deformation and thermal deformation from the crest on the sector.

Internal and external diameters of the supporting disc 1 (Fig.4) by sectors performed coaxially mounting surface of the supporting disc annular grooves (steps) 5 and 6 for alignment respectively 7 external and 8 internal rings. On the upper supporting surface of the support disk 1 install kit sectors 9 (Fig.2,4) of siliconized graphite, made of geometric shapes in the form of a sector and its working contact surface. Using the set of sectors of siliconized graphite provides improved manufacturability lining the crest of the axial sliding bearing large size, increased reliability and maintainability in the operation.

To prevent the occurrence of hydrodynamic perturbations edge 10 of the input (Fig.2, 5) sectors 9 are made of deviating from the radial direction in the direction of rotation is of larger diameter sectors. To ensure a smooth change of direction of flow of the cooling and lubricating water in the grooves on the input and output between sectors with district radial direction and, conversely, the edge of the take-up reel 10 sector has a shape approximating a parabolic (Fig.3), and internal and external contours of the corresponding radius curves 11, 12, 13, 14 (Fig.5). Using as a cooling and lubricating liquid water is fire.

Fixation sectors 9 when working from rotation relative to the supporting disk 1 is produced using the side surface of the intermediate strips 15 (Fig.4, 7) set the axis 16 in the openings 17 of the supporting disc 1, the lugs 18 (Fig.8) into the grooves 19 (Fig.6) sector, providing mutual axial fixation.

Mount sectors 9 relative to the reference disk 1 (Fig.4) produce 7 external and 8 internal rings and elastic elements 20 and 21 (Fig.4).

Additional fixation of sectors 9 from rotating relative to the reference disc 1 perform locking of Zalingei sectors with respect to the outer 7 and 8 internal rings.

Mount retainer 7 external and 8 internal rings to produce disk, in the particular case, the bolts 22 and screws 23 (Fig.4), toparadise washers 24 and 25 (Fig.4).

Mounting pads 27 of the axial sliding bearing to the ridge 26 is in promesed is between the supporting corbels 4 (in the particular case of bolts or screws, having a jammed from samootvinchivaniya).

The Assembly pads perform the installation on the support disk 1 bars 15 with the installation of the sectors 9, the elastic elements 20, 21 and retainer 7 external and 8 internal rings with their fastening to the support disk.

1. The axial slide bearing comprising a housing and a shaft with a flange, a support surface which has a disk with annular projections and between the housing and the disk is self-aligning pads with contact with the disc on their working surfaces, self-aligning pads provided with anti-friction pads on the supporting surface of the disc is made of two annular ledge, and on its working surface mounted anti-friction segments, characterized in that the supporting disk made with alternating support belts and grooved side facing the set of sectors, internal and external diameters of the supporting disc is made Seating surfaces, have inner and outer rings that secure the sector of anti-friction material via elastic elements, fixation of sectors from rotation relative to the reference disk is performed by the positioning of the intermediate strips between sectors, which are fixed axis of the strap into the holes of the supporting disc, the sector of anti-friction material made with steps p is on the outer and inner rings, at the top of the sector performed radius of curvature, at the bottom of the grooves, providing a mutual axial fixation of the lead edge of the sector completed the form, close to parabolic, while cooling and lubrication is carried out by alternating channels formed straps, sectors, internal and external rings.

2. The axial sliding bearing under item 1, characterized in that the fastening plates to the comb is made in the interval between the supporting corbels bolts or screws with locking from samootvinchivaniya.

3. The axial sliding bearing under item 1, characterized in that sector is made of siliconized graphite or silicon carbide.



 

Same patents:

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

Gas-dynamic bearing // 2496032

FIELD: machine building.

SUBSTANCE: gas-dynamic bearing includes rod, and housing, in which annular carrier card (3) with elastic petals (4) overlapping each other is arranged. Sector slots (5) are made in card (3) opposite petals (4). Carrier card (3) with petals (4) is made of set of plate-like shaped elements (6) attached to each other, for example by spot welding at four points (7). Sizes of plate-like shaped elements (6) are chosen so that solid annular carrier card (3) with petals (4) can be formed at their attachment to each other.

EFFECT: simpler design of gas-dynamic bearing.

5 cl, 4 dwg

FIELD: machine building.

SUBSTANCE: plain thrust bearing from synthetic resin has upper housing (100) from synthetic resin, lower housing (200) from synthetic resin and assembly (300) of thrust bearing from synthetic resin, which is placed between housings (100) and (200). At boundaries of a sliding strip between upper surface of lower annular plate-like section (202) of housing (200), which restricts the lower surface of lower annular groove (204) and lower surface of upper annular plate-like section (102) of housing (100) on one side, and upper surface and lower surface of assembly (300) on the other side, which come into sliding contact with upper and lower surfaces, there is silicon grease based on silicon oil and having kinematic viscosity coefficient at 25°C of not less than 0.0001 m2/s and not more than 0.5 m2/s and containing a thickener to maintain working penetration of not less than 200 and not more than 400. The above silicon oil is silicon oil that contains an additive or modified silicon oil.

EFFECT: creation of plain thrust bearing that is capable of preserving low friction coefficient and preventing microslipping phenomenon at sliding during a long period of time, which allows preventing abnormal friction noise referred to microslipping phenomenon.

12 cl, 9 dwg, 2 tbl

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

Turbocompressor // 2469213

FIELD: machine building.

SUBSTANCE: turbocompressor for internal combustion engines includes housing with oil supply, discharge lines, cover plate of housing, shaft with impellers of compressor, turbine, radial and axial sliding bearings and pad plate. Axial sliding bearing is made in the form of two bases, on working surfaces of which oil supply slots and wedge-like grooves are made, which can be adjacent to pad plate. A groove is made on the base on the side of the housing cover plate and forms together with cover plate a cylindrical chamber that is connected to oil supply slots and oil supply line.

EFFECT: improvement of axial sliding bearing operation.

6 dwg

FIELD: machine building.

SUBSTANCE: ring (2') of a support bearing is arranged in the form of a V-belt pulley. At the same time the ring (2') of a thrust bearing shall be arranged mainly in the middle of the total length of a shaft (1) of a turbine expansion engine.

EFFECT: higher load-carrying capacity of a thrust bearing.

2 cl, 4 dwg

Fluid bearing // 2463493

FIELD: machine building.

SUBSTANCE: proposed bearing comprises aligned top and bottom racers 1, 2. Racer 1 is furnished with flute 3 facing said racer to allow maintaining working clearance δ between racers 1, 2. Bearing is provided also with pump 4 to force fluid in working clearance δ. Racer 1 is shaped to annular groove 3 with its walls surrounding, at least section of racer sidewall to allow ring to revolve free. Racer 2 is immersed in working fluid do depth h by gravity G and extra vertical load F in compliance with preset ratio while total cross-section area S1 of side clearances b1 and b2 are calculated by specified formula. Vertical load F at racer 2 does not exceed bearing capacity of the bearing Fmax. Note here that groove sidewalls are vertical as well as mating walls of racer 2.

EFFECT: keeping the large-size circular object twining aroubd the vertical axis.

2 cl, 1 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

FIELD: electromechanical engineering; vertical-shaft water-wheel generators.

SUBSTANCE: proposed plain bearing for vertical-shaft water-wheel generators has segments mounted in its housing and shaft-mounted bushing. Bottom butt-end of bushing carries rectangular-section ring assembled of two or more parts with radial slots uniformly disposed over circumference at bushing butt-end. Slots and butt-end surface of bushing form radial holes designed to force lubricant to friction zone.

EFFECT: improved functioning of updated plain bearing.

1 cl, 2 dwg

FIELD: mechanical engineering.

SUBSTANCE: bearing comprises rotor that rotates together with the shaft of the rotor, adjusting thrust ring, and at least one bearing segment that is unmovable and bears on the housing of the bearing. The adjusting thrust ring has plastic matrix and reinforcing fibers. The adjusting thrust ring is made of a layered plastic and is composed of at least four layers of reinforced plastic. The fibers in each layer are oriented in the same direction.

EFFECT: prolonged service life.

5 cl, 3 dwg

FIELD: mechanical engineering.

SUBSTANCE: device comprises thrust block (6), bottom levers (2), top levers(1), unmovable members (4). Rollers (3) are interposed between the top (1) and bottom (2) levers. Bottom levers (2) bear on unmovable member (4) through spherical bearings (5). Top levers (1) bears on unmovable member (4) through rollers (3) and bottom levers (2). Thrust block (6) bears on top levers (1) through spherical bearings.

EFFECT: improved design.

1 dwg

FIELD: engines and pumps.

SUBSTANCE: hybrid gas-film thrust bearing represents a ring with its working surface furnished with wedge grooves alternating with smooth sections. Here note that the foot surface is made smooth. The every wedge groove section has, at least, one through hole.

EFFECT: free intake of gas into lubricating groove in the wedge grooves section at any size of lubricating gap on smooth sections and higher efficiency of the working surface cooling by gas film.

3 dwg

FIELD: power engineering.

SUBSTANCE: invention is related to the field of heat power engineering and may be used in design, production, reconstruction and operation of steam and gas turbines. Thrust bearing (1) of turbomachine comprises stop blocks (2), movably fixed with the help of radial pins (3) in annular race 4 (from two halves), installed in body of thrust bearing (1). Working surface of stop blocks (2) fits closely to side surface of thrust collar (5) of turbomachine rotor, and support prisms (6) of stop blocks (2) rest on disk elastic membranes (7), having thrust protrusion (8) and rigidly connected along external diametre with annular race (4), in body of which under each membrane (7) there are cylindrical chambers (9), connected to each other by means of sealed hydraulic annular header (10) and creating closed system of cavities filled with incompressible working liquid (11), which executes hydraulic connection between chambers (9). Annular header (10) is connected to expansion tank (12) of atmospheric type by means of drain line (13), in which safety valve (14) is installed, and suction line (15), in which check valve (16) is installed. Drain (13) and suction (15) lines are brought into expansion tank (12) under level of working liquid (11) that fills it.

EFFECT: higher bearing capacity of thrust bearing, and also reliability and efficiency of turbomachine operation.

4 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: invention relates to machine building. Proposed plain bearing comprises assembly incorporating a slide that features high melting temperature and a melting guide. Note that a porous layer is applied onto one of contact surfaces.

EFFECT: higher bearing capacity combined with low friction factor.

1 dwg

FIELD: machine building.

SUBSTANCE: invention refers to compressor engineering, particularly to fastener assemblies of crowns of thrust oil bearings on shaft of centrifugal compressor machines. The fastener assembly of thrust crown of oil bearings on the shaft consists of a facility preventing shifting of the crown along axis of the shaft and of a facility preventing slipping of the crown around the shaft. The facility preventing slipping of the crown around the shaft is made in form of a tape out of elastic material with lengthwise corrugation located between the thrust crown and the shaft in a circular slot. The slot is made on surface of the thrust crown or shaft.

EFFECT: increased manufacturability and possibility to apply less strict allowances for shaft diametres and thrust crown after mechanical treatment; prevention of fretting corrosion; increased rate of assembly; compensation of axis misalignment and reduction of noise in some cases.

5 cl, 4 dwg

FIELD: machine building.

SUBSTANCE: invention relates to machine building, particularly to structures of plain thrust bearings for shafts or rotating axis of machines and equipment and can be used in submersible multistage centrifugal electric pumps for strata liquid extraction (oil-and-gas mixture) from deep oil wells of minor diametre. Plain thrust bearing contains abutment (1), under-abutment (2) and intermediate thrust collar (3), implemented with flat annular bearing surfaces on its working sides. Ring (3) is free mounted on shaft (7) between abutment (1) and under-abutment (2) with ability of rotation relative to them. Bearing surface (11) of abutment (1) is implemented as smooth. Bearing surface (14) of ring (3) directed to bearing surface (11) is implemented with lubricating grooves (16). Bearing surface (13) of under-abutment (2) is implemented with lubricating grooves (15), and bearing surface (12) of ring (3) directed to bearing surface (13) is implemented as smooth and with major average diametre D5 than average diametre D3 of bearing surface (14). Bearing surfaces (13) and (14) are implemented with lubricating grooves (16) and (15). Divided by these grooves for segments. Bearing surfaces (11), (12), (13) and (14) are implemented from wear-resistant substances with solidity not less than 380 HV.

EFFECT: increasing of reliability and vehicle capacity of plain thrust bearings for shafts of submersible centrifugal electric pumps.

3 cl, 6 dwg

FIELD: mechanical engineering.

SUBSTANCE: invention refers to mechanical engineering, particularly to design of thrust bearings operating under modes of boundary or mixed lubrication and implemented in machine-tool manufacture, machine building and other branches of industry. The thrust journal bearing consists of a fixed support and a shaft. End bearing surface of the shaft is made in form of three sections, shape of which is described with equations: y = 0, where x1 x2 are current coordinates in the system of rectangular coordinates x1O1y1 and x2O2y2; a1 a2, n1 n2 are coefficients characterising tribophysical properties of materials and modes of bearing operation.

EFFECT: increased service life of thrust journal bearing operation.

3 dwg

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