Thrust bearing unit

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

 

The invention relates to the field of turbine construction and can be used when designing, for example, gas turbine installations.

Known thrust bearing unit containing a rotor with a fifth radial segment bearing housing, multi-layered liner consisting of a porous elastic vibrationfree material and anti-friction material (see EN No. 2301361, IPC H02K 5/16, 20.06.2007).

Also known thrust bearing Assembly comprising an annular heel, heel placed with a gap made with the possibility of supplying it with compressed air (see RU # 110565, IPC H02K 5/16, 20.11.2011,).

The use of a thrust bearing Assembly in a powerful turbomachines requires increasing the diameter of the abutment of the thrust bearing unit for obtaining the necessary bearing capacity, this leads to a high circumferential speeds of the heel and to significant friction losses in it due to the small axial clearance (power friction resistant gas-static bearing is inversely proportional to the axial gap between the fifth and the heel).

The challenge which seeks the proposed solution is to increase the carrying capacity of the thrust bearing unit in the operating mode, reducing the deformation of the gap in the thrust bearing unit from the high pressure of the pressurization gas and reliable starting and stopping the turbomachine.

The proposed technical solutions provides high load-carrying capacity of the thrust bearing unit in the operating mode (reduce it friction losses), run reliably measured, reduce the deformation of the gap in the thrust bearing unit from the high pressure of the pressurization gas damping vibrations of the rotor of the turbomachine, due to the axial gas-dynamic forces of the turbine or compressor.

This technical result is achieved in that the thrust bearing Assembly comprising an annular heel, heel placed with a gap made with the possibility of supplying it with compressed air, characterized in that the thrust bearing is formed by a casing provided with a cylindrical recess with a flat bottom formed by an annular ledge around the perimeter of the housing, and the bottom of the cylindrical recess posted elastic strip with supported on her gas-static bearing, made in the form of a ring divided into sectors radially oriented plates, fastened to the housing of the thrust bearing, with the side facing the heel, the perimeter of the sector bearing provided with a flange, forming the notch, and the notch of each sector is fixed inserts gas-static bearing made of antifriction material, while the cross section of the lining is of rizana T-shape, with shelves lining made with the possibility of engagement of the radial flange sectors of the bearing, while the outer surface of the liners of gas-static bearing facing the heel with the formation of her working gap, in addition, the volume of the sectors made system of communicating channels with a possibility of it compressed air from an external source, the outlet of which is communicated with the supply holes in the liners of gas-static bearing, the through holes communicating with the working gap. In addition, the heel is made hollow and has an internal power frame. When this elastic strip is made of steel plate with annular corrugations filled with encapsulation on both sides with a layer of rubber or polyurethane.

Comparative analysis of the proposed technical solution with essential features unique and prototype demonstrates its compliance with the criterion of "novelty".

This distinctive features in the claims solves the following functional tasks.

A sign indicating that the thrust bearing is formed by a casing provided with a cylindrical recess with a flat bottom formed by an annular ledge around the perimeter of the housing Yu fixation in the case of all elements, performance bearing (elastic strip and parts of the ha is staticheskogo bearing).

A sign indicating that "at the bottom of the cylindrical recess posted elastic strip with supported on her gas-static bearing", provides elastic automatic regulation of the size of the working gap and gas-static bearing capacity of the bearing.

Signs indicating that gas-static bearing is made in the form of a ring, is divided into sectors radially oriented plates, fastened to the housing of the thrust bearing, ensuring the independence of the elastic displacements of each sector of gas-static bearing, depending on the load distribution on the area of the bearing, which ensures the necessary axial clearance in the thrust bearing unit during installation and in working condition.

Signs indicating that "from the side facing the heel, the perimeter of the sector bearing provided with a flange forming the recess"to provide reliable fixation inserts gas-static bearing in these grooves.

Signs indicating that "the cross section of a lining attached to T-shaped, with shelves lining made with the possibility of engagement of the radial flange sectors of the bearing, ensure the retention of the sectors bearing from moving along the axis of rotation within the deformation of the elastic strip.

A sign indicating that the deposits and gas-static bearing made of antifriction material, ensures the prevention of the destruction of the heel and liner in case of contact with the accident.

Signs indicating that the thrust bearing unit in the amount of sectors bearing made system of communicating channels with a possibility of it compressed air from an external source, the outlet of which is communicated with custom inserts gas-static bearing through-holes communicating with the working gap, allow compressed air in the working gap of gas-static axial bearing.

A sign indicating that the thrust bearing unit "heel is made hollow and has an internal power frame"reduces the mass and mass moments of inertia of the rotor of the turbomachine, which leads to reduction of dynamic loads from the gyroscopic moment during the vibration of the housing of the turbomachine, and also improves the dynamic characteristics of the rotor during start and stop of the turbomachine.

The sign, which indicates that the elastic strip is made of steel plate with annular corrugations filled with encapsulation on both sides with a layer of rubber or polyurethane, provides the necessary stiffness and damping of the elastic substrate node in working state, and the oscillation of the rotor, due to the axial gas-dynamic forces t is rbine or compressor due to the dissipation of the vibration energy of rubber or polyurethane.

Figure 1 shows a longitudinal section and figure 2, is a cross-sectional view of the thrust bearing Assembly according to the sectors of the bearing. Figure 3 shows a cross-section of the sector.

In the drawings is shown a housing 1, an annular ledge 2, the elastic strip 3, the annular corrugations 4, sector 5 bearing, sector liners 6, the pads 7, the heel 8, the flange 9, the working gap 10, the inner main frame 11, the radial holes 12, the tangential channels 13, the socket 14, the sealing rings 15, 16, the holes 17 in the housing 1, the axial bore 18 in sectors 5 of the bearing, the axial bore 19 in the liners of gas-static bearing 6, the cover 20, the stub 21.

Thrust bearing unit consists of a heel and heel. The thrust bearing is formed by a housing 1, provided with a cylindrical recess with a flat bottom formed by the annular ledge 2 on the perimeter of the housing 1. At the bottom of the cylindrical recess pinned elastic strip 3 made in the form of a plate which is deformed with the formation of annular corrugations 4 of steel with prescribed elastic properties, for example, HTM that are filled with both sides of the plate encapsulation (or glued) a layer of elastic material such as rubber or polyurethane. On the elastic strip 3 supported gas-static bearing, made in the form of a ring. Gas-static bearing evenly divided into sectors 5 happy is social oriented plates 7 of the same thickness, fixed to the body 1 of the thrust bearing. From the side adjacent to the heel 8, the perimeter of the sector 5 provided with a flange 9 forming the recess. In the recess of each sector 5 evenly distributed around the circumference and fixed (e.g., glue) inserts gas-static bearing 6. Cross-section of a non-magnetic metal plates 7 attached to T-shaped, with shelves lining 7 is arranged to engage the radial shoulder 9 sectors 5. Heel 8 is made hollow and has an internal power frame 11.

The volume of each sector 5 bearing made system of communicating radial holes 12 and the tangential channels 13 with the possibility of filing them in compressed air from an external source (not shown) through the socket 14 with wearing them sealing rings 15, 16. The fittings 14 can move freely in the holes 19 of the housing 1 within the deformation of the corrugations 4. In radial holes 12 sectors 5 bearing made of the axial hole 18, communicating with the axial hole 19 in the liners 6, published in the working gap 10 gas-static bearing. The diameter of the radial holes 12 sector 5 should be as small as possible, but the total area flow area must exceed the total area of the axial bore 19 sector 5 and pad 6 three to five times, and the area of orifice Tangen the territorial channel 13 sector 5 must be greater than or equal to the total of the cross-section area of radial holes 12 sector 5, that will reduce the deformation of the axial working gap 10 from the high pressure gas in these holes.

Tangential channels 13 are closed by caps 20, the radial holes 12 provided with plugs 21. Gas-static bearing formed facing each other of the end surfaces of the sector liners 6, the abutments 8 and a gap 10 between them.

Thrust bearing unit is assembled in the following order. Pre-made case 1 thrust bearing and sectors 5 with radial holes 12 and the tangential channels 13. Tangential channel 13 is closed by the cover 20 and scald on the perimeter, and then smooth out the welds. In case 1 thrust bearing fix (glue) elastic washer 3 required rigidity, which is pre-punched for formation of annular corrugations 4 and thermally treated, and to the bumps 4, in turn, prevulcanized with two sides rubber or polyurethane. Sectors liners 6 glued in sectors 5 of the bearing. Drill axial supply holes 19 in the sectors of liners 6 and the axial feed holes 18 in sectors 5, clean them and set the ends of radial holes 12 of the stub 21. On the elastic strip 3 evenly spaced around the circumference install (glue) sectors 5 of the bearing and between them set radially oriented non-magnetic metal plates , which is fixed, for example, screws. The assembled thrust bearing mounted in the casing of the turbomachine, mount the rotor and install the heel 8.

Thrust bearing unit operates as follows. Before rotation of the abutment 8 through the holes 17 in the housing 1 fittings 14 in sectors 5 bearing serves under high pressure lubricant (cleaned and cooled gas from an external compressor or from the receiver. This gas enters the tangential channels 13 and then spread through the radial holes 12 sectors 5 and then through the axial feed holes 18 in sectors 5 and the axial bore 19 in the sector of the liner 6 is supplied to the working gap 10 of the bearing unit. As a result, the heel 8 POPs up on the gas lubricating layer. Under the action of gas pressure in the gas lubricating layer increases the working gap 10 in the axial bearing arrangement (due to deformation of the corrugations 4 and the elastic strip 3), thus reducing the friction in the axial bearing unit due to the increase in axial working gap 10. The corrugations 4 and the damping of the elastic strip 3 also allow you to compensate for thermal deformation of the heel 8.

When bilateral, symmetrical design of the axial bearing Assembly of gas-static component of the reaction force of the proposed bearing Assembly, acting symmetrically and oppositely directed, automating the Eski implements a negative feedback deviation heel 8 from the equilibrium position.

1. Thrust bearing Assembly comprising an annular heel, heel placed with a gap made with the possibility of supplying it with compressed air, characterized in that the thrust bearing is formed by a casing provided with a cylindrical recess with a flat bottom formed by an annular ledge around the perimeter of the housing, and the bottom of the cylindrical recess posted elastic strip with supported on her gas-static bearing, made in the form of a ring divided into sectors radially oriented plates fastened with the housing of the thrust bearing, with the side facing the heel, the perimeter of the sector bearing provided with a flange forming a recess, and the recess of each sector fixed inserts gas-static bearing made of antifriction material, while the cross section of a lining attached to T-shaped, with shelves lining made with the possibility of engagement of the radial flange sectors of the bearing, while the outer surface of the liners of gas-static bearing facing the heel with the formation of her working gap, in addition, the volume of the sectors made system of communicating channels with a possibility of it compressed air from an external source, the outlet of which is communicated with the supply holes in the liners gasstation the one bearing, through-hole, communicating with the working gap.

2. Thrust bearing unit according to claim 1, characterized in that the heel is made hollow and has an internal power frame.

3. Thrust bearing unit according to claim 1, characterized in that the elastic strip is made of steel plate with annular corrugations filled with encapsulation on both sides with a layer of rubber or polyurethane.



 

Same patents:

FIELD: machine building.

SUBSTANCE: device (18) and method to support a cylindrical element (12) are proposed. The device (18) comprises a base (28), having an upper surface (40) of a hemispherical concave shape, and a carriage (30), resting against the upper surface (40) of the base (28). The carriage (30) has a lower surface (50) and an oppositely arranged upper surface with contact elements for contact with a cylindrical element (12) and its support with the possibility of rotation. The lower surface (50) of the carriage (30) interacts with the upper surface (40) of the base (28) and has a hemispherical convex shape, complementary to the hemispherical concave shape of the upper surface (40) of the base (28). The device (18) additionally comprises a reservoir (46) for lubrication, arranged in the base (28) and deepened on its upper surface (40), and facilities for delivery of lubricant into the reservoir (46). The lower surface (50) of the carriage (30) and the upper surface (40) of the base (28) limit the shell around the reservoir (46). Pressure of lubricant between the carriage (30) and the base (28) provide for hydraulic disconnection of the lower surface (50) of the carriage (30) from the upper surface (40) of the base (28) with provision of the possibility of self-alignment of the carriage (30) with the cylindrical element (12).

EFFECT: invention makes it possible to use multiple elements as means of contact with a cylindrical element.

10 cl, 8 dwg

Hydrostatic bearing // 2508483

FIELD: machine building.

SUBSTANCE: proposed device consists of case 1, shaft 2, bush 3 and float ring 4. Said case has groove 5 to force working medium into chamber 6 between case 1 and bush 3 fitted in case 1 to clasping aforesaid shaft 2 with working clearance that makes a bearing lubing layer 7. Bush 3 has circular feed groove 8 and connection grooves 9 arranged in two circular rows of symmetrical circular feed groove 8 to feed bearing lubing layer 7. Float ring 4 fitted in chamber 5 has through hole 10 at central part, grooves 11 at face surfaces, chamfers 12 at butts of inner and outer surfaces to make, along with bush outer surface, the serial throttling steps 13, 14 of ring hanger 4. Intake steps 13 feature larger clearance while discharge steps 14 have smaller clearance to communicate with connection grooves 9.

EFFECT: higher reliability and bearing capacity.

1 dwg

FIELD: machine building.

SUBSTANCE: invention can be used as supports of high-speed rotors of machines and units loaded with radial and axial loads, provide when required high carrying capacity at preserving stable position of the rotor in air conditioning systems of aircraft cabins, as well as turbo-supercharge systems in modern car industry and in microgas-turbine electric units. A combined radial-axial gas-dynamic leaf-type plain bearing includes a sleeve enclosing the shaft neck with slots located on its inner surface, into which inserts with leaves are inserted. In order to provide higher carrying capacity at maintaining the rotor stability in the design there provided is cylindrical and conical surfaces of the bearing and the shaft.

EFFECT: improving reliability and increasing durability of a bearing assembly, service life, stable movement and suppression of beating of shafts and rotors.

3 dwg

FIELD: machine building.

SUBSTANCE: regulator comprises housing 1 with covers 2, floating stepped cylindrical plunger 3 with recess made at its side surface to make feed groove 8 with housing surface to communicate with feed channel 6 made in the housing. Inlet slit orifices are formed by slit throttling gaps 4 arranged on both sides of feed groove to converge along fluid flow within the limits of cylindrical part of plunger 3. Opposite nozzle 7 arranged in covers 7 coaxially with plunger 3 communicate with loading bearing seats 9 of hydrostatic bearing 10. Control orifices are composed of end face throttling slits 5.

EFFECT: simplified design, decreased overall dimensions.

2 dwg

Gasostatic bearing // 2486380

FIELD: machine building.

SUBSTANCE: gasostatic bearing includes a housing with a radial channel, a shaft and a movable sleeve located in the cavity between the housing and the shaft. Annular projections are made on outer cylindrical surface of the sleeve on both sides of the annular channel. At that, in the sleeve, at location point of external end faces of the annular projections there made are rows of through radial holes. Between the housing and the outer cylindrical surface of the sleeve there formed is a stepped throttling gap. Radial channel is used as an outlet channel. In the middle plane of the bearing, on outer side of the sleeve there made is an annular channel interconnected with the radial channel. Between the housing and the shaft there formed are axial throttling gaps. Between end surfaces of the sleeve and the housing there formed are radial slot throttling gaps, at the point of imagined intersection of which with the stepless throttling gap there formed are annular cavities. Annular cavities are interconnected with a lubricant injection source.

EFFECT: creation of a gas static bearing design appropriate to the material, which provides improvement of load characteristics.

1 dwg

FIELD: machine building.

SUBSTANCE: assembly of hydrodynamic ribbon bearing includes bearing housing (3) including hole (4) to provide the fluid medium flow to housing (3), at least on ribbon insert that includes at least one hole and restricts a cylindrical cavity to receive rotating shaft (11) into it, and devices for fluid medium supply from hole (4) to the gap between ribbon insert and shaft (11) through the hole of ribbon insert till film of compressed fluid medium is formed in that gap. The hole of the ribbon insert represents a parallel passing slot hole.

EFFECT: providing additional supply of lubricant to a gap between external periphery of the rotating shaft and internal surface of ribbon bearing wall, preventing dry friction, reducing wear of ribbon bearing surface and increasing loading capacity of the bearing.

14 cl, 16 dwg

Hydrostatic support // 2484322

FIELD: machine building.

SUBSTANCE: hydrostatic support consists of guide 1 and body 2, their working surfaces being separated by slotted throttling gap that makes the support bearing layer. Body 2 has bearing channel 4, feed duct 5 communicated with working fluid source, and drain channel 6. Bearing channel 4 has steeped recess. Top step of said recess at its bottom is communicated with feed duct 5 while bottom step communicated with channel 6. Stepped plunger 7 is arranged in said recess to make slotted throttling gaps 8, 9 converging along working fluid flow owing to annular ledges 15, 16 at plunger side surfaces. Plunger 7 has throttling channel 10 and control channel 11 communicated therewith via throttling gap 12. Top and bottom steps are confined by conjugated surfaces of body 2 and plunger 7. Drain chamber 13 is formed at bottom step to communicate with channel 6 while pressure chamber 15 is formed at bottom step to communicated with channels 5, 10.

EFFECT: perfected operating performances.

2 dwg

Electric spindle // 2479095

FIELD: electricity.

SUBSTANCE: electric spindle comprises a body, in the cavity of which there is a laminated stator core, equipped with semi-closed slots, in which there are winding coils placed, besides, in the cylindrical cavity of the stator there is a rotor installed as capable of rotation, and its bearing unit is arranged as capable of gas-dynamic support, at the same time the electric spindle is equipped with a clamp for fixation of a working tool. At the same time, according to this invention, conductors of the winding of each stator slot are fixed with a wedge and a key insert contacting with it from insulating material, the cross section of which is made as capable of fixation of the key insert back under the slot wedge, and the ledge section complies with the slot splint section, besides, the profile of the key insert ledge surface corresponds to the surface of the cylindrical cavity of the stator core, the surface of the key insert back along its entire length is equipped with a longitudinal chute, which is open into an inner cavity of the spindle body arranged as capable of supplying air into it, in the cavity of the electric spindle body there are cylindrical bushings placed, the diameter of the cavity of which is equal to the diameter of the cylindrical cavity of the stator core, and between the ends of the stator core and the ends of cylindrical bushings facing them there are support rings installed, the cavity of which exceeds the diameter of the cylindrical cavity of the stator core, equipped with a collar that covers a part of the outer surface of bushings, the specified thrust rings are made of non-magnet material and are fixed with the stator core, and the cylindrical bushings are installed as capable of radial displacement relative to the longitudinal axis of the cylindrical cavity of the stator core, for this purpose contacts of bushings with the body, the end shield and collars of thrust rings are equipped with sealing rings arranged as capable of elastic deformation radially and along the longitudinal axis of the stator core. The rotor is made with inner cavities, for this purpose it comprises coaxial hollow shaft and shell, which are rigidly connected to each other, at least by three links equidistant from each other and made in the form of plates of identical thickness, being aligned radially to the longitudinal axis of the rotor, the ends of the rotor are rigidly fixed to the end covers, for instance, by vacuum-diffusion welding, besides, one of end covers of the rotor is arranged as thickened and is equipped with a clamp for fixation of a working tool.

EFFECT: increased life of electric spindles, including those operating under higher and high frequencies of rotation, with simultaneous provision of minimum rotor sagging and improved cooling of both a rotor and a winding of an electric spindle stator.

3 cl, 2 dwg

Hydrostatic bearing // 2471095

FIELD: machine building.

SUBSTANCE: bearing includes housing made in the form of a bushing enclosing a spindle. In housing there are three radially located hydraulic elements, each of which consists of coaxially located inlet hole, vortex nozzle and pocket interacting with spindle by means of an oil wedge. In housing there are radially located outlet holes in the quantity equal to the number of radially located hydraulic elements. Pockets represent cavities made in the form of holes of round or non-round shape, which are connected through throttle and filter to supply line.

EFFECT: increasing efficiency coefficient, durability and reliability of bearing.

2 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: invention relates to machine building industry, in particular, to sliding supports. Self-adjusting hydrodynamic sliding bearing includes housing with radial supports, which is made in the form of a cylindrical frame, in which there radially located are at least three self-adjusting inserts with gaps relative to each other. Each insert has one spherical support made in the form of a ball segment rigidly attached to a cylindrical pin, which is fixed in frame with screws with washers passing through the cover plate. O-rings are provided between cover plate and frame.

EFFECT: increasing efficiency, service life and improving transfer reliability.

1 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

Machine axis // 2462624

FIELD: machine building.

SUBSTANCE: machine axis represents a rotary body (1) installed at two sides in fixed supports (2). At the ends of the rotary body (1) made from a solid material and fixed supports (2) there are hemispherical grooves (4) to install a ball (5). The diametre of the ball (5) at one end of the rotary body (1) is more than at its other end.

EFFECT: simplified design of a machine axis and reduction of its wear.

3 dwg

FIELD: machine building.

SUBSTANCE: thrust bearing assembly consists of pivot (1), centre pivot (2), in a gap between which a bearing provided with possibility of gas dynamic formation of gas lubrication is arranged, which is equipped with compressed gas supply device to gap (3) between pivot (1) and working surface of bearing. As bearing there used is paddle-type bearing including support (4) and carrying (5) boards made in the form of washers or discs from elastic material, the latter of which forms working surface of bearing. Support board (4) is made in the form of spring structure. Pivot (1) is pressed on shaft (6). Compressed gas supply device is made in the form of through channels (7) made on rear side of pivot (1), the outlet holes (8) of which are distributed along surface of pivot (1), which faces working gap (3), and receiving holes (9) have the possibility of receiving compressed air from external supply at shaft (6) rotation. Shaft (6) is equipped with holes (11) for gas supply inside shaft (6) and has axial hole (12) for gas movement inside shaft (6), as well as holes (13) for gas removal from shaft and its supply to channels (7).

EFFECT: improving reliability and carrying capacity of bearing.

4 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: machine building.

SUBSTANCE: plain thrust bearing (1) consists of: first circular case (4) made of synthetic resin, second circular case (6) also made of synthetic resin and circular sliding element (7) corresponding to unit of plain thrust bearing; upper circular cover (10) and circular metal plate (15). Case (4) has upper circular surface (2) and external circular periphery surface (3) of cohesion. Case (6) is superposed on case (4), rotates around axis (O) of case (4) and has lower circular surface (5) opposite to surface (2) of case (4). The unit of the bearing is located between surface (2) of case (5) and surface (5) of case (6); also, lower surface (78) or upper surface (77) of the bearing unit are in sliding contact correspondingly with surface (2) of case (4) or surface (5) of case (6). Cover (10) has internal circular periphery surface of cohesion engaging surface (3) of case (4). Plate (15) is located between surface (11) of case (6) and lower surface (14) of cover (10) so, that its lower surface (12) contacts surface (11) of case (6), while its upper surface (13) contacts surface (14) of cover (10). Plate (15) has internal circular periphery surface (101), diametre of which is less, than internal diametres of internal periphery circular surfaces (21, 48, 61, 66 and 86) of cases (4; 6) and cover (10).

EFFECT: plain thrust bearing functioning as support for end of piston rod; simplification of setup attachment and reduced expenditures.

4 cl, 7 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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