Thrust bearing assembly

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

 

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,).

When using a thrust bearing Assembly in a powerful turbomachines it is necessary to increase the diameter of the abutment of the thrust bearing Assembly to obtain the required bearing capacity of the node, which will lead to high circumferential speeds of the heel and to significant friction losses in this site due to the small axial gap in it (power and 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 operation, and reliable starting and stopping of the turbomachine.

The technical result of the proposed technical solutions is tion is expressed in providing high load capacity of the thrust bearing unit in the operating mode (reduce it friction losses, until ventilation), a safe start, turbo machines, reducing deformation of the gap in the thrust bearing unit from the high pressure of the pressurization gas in the damping of the rotor of the turbomachine, due to the axial gas-dynamic forces the turbine and 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 housing of the thrust bearing, which is 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 by sector elastic strip supported on them by the sectors of gas-static bearings, forming, respectively, the elastic ring gaskets and a ring of non-magnetic material, while the side sectors of gas-static bearings, facing the heel, provided with a recess with a flat bottom formed by the flange around the perimeter of the sector of gas-static bearing, and in the recess of each sector is fixed pie permanent magnets forming circuit Halbach, which used magnets magnetized in the axial and tangential directions, the magnets magnetized in the axial direction, RA is medeni between contact with the side walls of the permanent magnets, magnetized in the tangential direction, while the cross section of a lining attached to T-shaped, with shelves lining made with the possibility of engagement of the radial flange of the sectors of gas-static bearings, and the outer surface of the sector of permanent magnets is a single plane facing the heel, made of nonmagnetic material, with the formation of her working clearance gas-static bearing, in addition, the volume of the sectors bearing made system of communicating channels of small diameter with a possibility of it compressed air from an external source, the outlet of which is communicated with a through hole made in the sector permanent magnets, communicating with a working gap of gas-static bearing. Additionally, the heel is made hollow and has an internal power frame. When this elastic strip is made of steel with annular corrugations filled with encapsulation on both sides with a layer of rubber or polyurethane. Additionally, permanent magnets made from an alloy of neodymium-iron-boron. This pie permanent magnets bonded to the sectors bearing the adhesive. Additionally, the surface of the heel, facing the thrust bearing, covered with a layer vysokoskorostnogo material, such as copper, and is made with high purity processing and surface.

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.

Signs indicating that the thrust bearing is formed by a housing of the thrust bearing, which is provided with a cylindrical recess with a flat bottom formed by an annular ledge around the perimeter of the enclosure, provide fixation in the case of all elements, performance bearing (elastic strip and parts of gas-static bearing).

Signs indicating that "at the bottom of the cylindrical recess posted by sector elastic strip supported on them by the sectors of gas-static bearings" and form", respectively, the elastic ring gaskets and a ring of non-magnetic material, ensure the independence movements of each sector of gas-static bearing, which ensures the necessary axial clearance in the thrust bearing unit during installation and in working condition and facilitates installation sector permanent magnets in the sectors of gas-static bearing.

Signs indicating that "side sectors of gas-static bearings, facing the heel, provided with a recess with a flat bottom formed by the flange around the perimeter of the sector gasstations the first bearing, provide the ability to secure the liners of gas-static bearing, in these notches.

Signs indicating that "in the hollow of each sector is fixed pie permanent magnets forming circuit Halbach, which used magnets magnetized in the axial and tangential directions, the magnets magnetized in the axial direction, placed between contact with the side walls of the permanent magnets magnetized in the tangential direction, allow in addition to gas-static forces to provide significant electrodynamic repulsive forces during the rotation of the heel without sticking pie permanent magnets to the heel. This increases the bearing capacity and stiffness of the thrust bearing Assembly. In this scheme magnetization (scheme Albaha) risk of permanent magnets provides increased magnetic flux and the direction of its main part in the area of the working gap of the thrust bearing unit for receiving considerable electrodynamic forces.

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 of the sectors of gas-static bearings, and the outer surface of the sector of permanent magnets is od is in the plane, facing the heel, made of nonmagnetic material, with the formation of her working clearance gas-static bearing", form a clearance in a gas-static bearing, hinder the movement of the sectors of gas-static bearings in the axial direction and rigid bond sector permanent magnets and sectors of the bearing makes it possible to reduce deformation of the surface of gas-static bearing and the perception of high load.

Signs indicating that the thrust bearing unit in the amount of sectors bearing made system of communicating channels of small diameter with a possibility of it compressed air from an external source, the outlet of which is communicated with a through hole made in the sector permanent magnet connected with a working gap of gas-static bearing", allow compressed air in the working gap of gas-static thrust bearing and to reduce deformation of the axial gap from the high pressure gas in these channels.

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 gyroscopic IOM the NTA when vibration 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 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 the turbine and compressor due to the dissipation of the vibration energy of rubber or polyurethane.

A sign indicating that "permanent magnets made from an alloy of neodymium-iron-boron, provides considerable electrodynamic forces due to the interaction of the eddy currents induced in the heel of the magnetic sector field permanent magnets with a field of these magnets, which increases the bearing capacity and stiffness of the thrust bearing Assembly.

A sign indicating that "pie permanent magnets and sector bearing bonded glue" that provides solidity pie permanent magnets with sectors of the bearing and thereby ensure the health of the structure.

A sign indicating that the surface of the heel, facing the thrust bearing, covered with a layer vysokoskorostnogo material, such as copper, and is made with high purity is the processing surface, provides increased eddy currents and, thus, the electrodynamic forces.

In Fig.1 shows a longitudinal section, and Fig.2, 3, 4 is a cross-sectional view of the thrust bearing Assembly according to the sectors bearing the permanent magnets and the heel, respectively. In Fig.5 shows a cross section of a sector of the bearing.

In the drawings is shown a housing 1, an annular ledge 2, the elastic strip 3, the annular corrugations 4, sector 5 bearing, non-magnetic metal plates 6, the heel 7, a flange 8, the permanent magnets 9, 10, 11, the working gap 12, the internal main frame 13, the radial holes 14, the tangential channels 15, the socket 16, the sealing rings 17, 18, the axial bore 19 in the housing 1, the axial bore 20 in sectors 5 of the bearing, the axial bore 21 in the sector permanent magnets 9, 10, 11, cover 22, stub 23.

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 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 filled encapsulation layer of rubber or polyurethane. On the elastic strip 3 supported sector gas-static bearing is, forming, respectively, the elastic ring gasket 3 and a ring of non-magnetic material consisting of a metallic non-magnetic sectors 5, spaced evenly around the circumference between the radially oriented non-magnetic metal plates 6, fixed to the body 1 of the thrust bearing. At this party sectors 5 gas-static bearings, drawn to the heel 7, provided with a recess with a flat bottom formed by the flange 8 around the perimeter of the sector of gas-static bearing. In the recess of each sector 5 bearing evenly distributed around the circumference and fixed (e.g., glue) multiple sector permanent magnets 9 made, for example, from an alloy of neodymium-iron-boron, magnetized in the axial direction, and in contact with the sector permanent magnets 10, 11, magnetized in the tangential direction (along the circumference). The outer surface of the sector of permanent magnets 9, 10, 11 constitute a single plane facing the heel 7, with the formation of her working gap 12. The heel 7 is made of a hollow of a nonmagnetic electrically conductive material and has an internal power frame 13.

The volume of each sector 5 bearing made system of communicating radial holes 14 and 15 tangential channels with the possibility of filing them in compressed air from an external source (on the drawing is not on the azan) through the socket 16 with wearing them sealing rings 17, 18. The socket 16 can move freely in the axial hole 19 of the housing 1 within the deformation of the corrugations 4. The diameter of the radial holes 14 sector 5 should be as small as possible, but the area of their bore must be larger than the total area of the holes 20 sector 5 and holes 21 in three to five times, and the area of orifice tangential channel 15 sector 5 must be greater than or equal to the total of the cross-section area of radial holes 14 sector 5 that will allow to reduce deformation of the axial working gap 12 from the high pressure gas in these holes.

In the radial holes 14 sectors 5 bearing made of the axial bore 20, communicating with the axial hole 21 in the sector permanent magnets 9, 10, 11 facing in the working gap 12 gas-static bearing. Tangential channels 15 are closed by caps 22, the radial holes 14 provided with a plug 23. Gas-static bearing formed facing each other of the end surfaces pie permanent magnets 9, 10, 11 and the abutment 7 and the gap 12 between them. Pie permanent magnets 9, 10, 11 and heel 7 form a thrust magnetic bearing.

Thrust bearing Assembly assemble in the following order. Pre-made case 1 thrust bearing holes 19 and sector 5 bearing with radial holes 14 and tangential the mi channels 15. Tangential channel 15 is closed by a cover 22 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. In sector 5 bearing glued pie permanent magnets 9, 10, 11. Next grind the outer surface of the pie permanent magnets 9, 10, 11 and cover the non-magnetic anti-friction material, for example, WAP-2. Drill axial feeding holes 21 in the sector permanent magnets 9, 10, 11 and the axial bore 20 in sectors 5 bearings, clean them and set the ends of the radial holes 14 of the stub 23. On the elastic strip 3 evenly spaced around the circumference install (glue) metal non-magnetic sector 5 of the bearing and between them set radially oriented non-magnetic metal plates 6, which are fixed, for example, screws. The assembled thrust bearing mounted in the casing of the turbomachine, mount the rotor and install the heel 7.

Thrust bearing unit operates as follows. Before rotation of the heel 7 through the holes 19 in the housing 1, the fittings 16, sector 5 bearing serves under high pressure is mazawi (cleaned and cooled gas from an external compressor or from the receiver. This gas enters the tangential channels 15, is distributed in the radial holes 14 sectors 5 of the bearing, and then through the axial feed holes 20 in sectors 5 of the bearing and the axial bore 21 in the sector permanent magnets 9, 10, 11 flows into the working gap 12 of the bearing unit. As a result, the heel 7 POPs up on the gas lubricating layer. During the rotation of the heel 7 additionally there electrodynamic forces due to the interaction of the eddy currents induced in the heel 7 of the magnetic sector field permanent magnets 9, 10, 11 with a field of these magnets. The axial component of the electrodynamic forces acting repulsive way between fifth 7 and sector permanent magnets 9, 10, 11. This force is summed with the forces of gas-static bearing force at the heel 7. As a result of increasing axial working gap 12 in the bearing due to the deformation of the corrugations 4, the elastic strip 3 and significantly reduces the friction in the bearing due to the increased axial clearance in the bearing. The corrugations 4 and the damping substrate 3 also allow you to compensate for thermal deformation of the abutment 7. The tangential component of the electrodynamic force has a braking effect, but it is not significant. With increasing linear velocity on the surface of the heel repulsive component of the electrodynamic forces led is ensured, and the braking is reduced. To increase the eddy currents in the heel 7 and, consequently, the electrodynamic forces the thrust bearing Assembly is applied to the plating surface of the heel facing the sector permanent magnets 9, 10, 11, and treatment of this surface with high purity.

When bilateral, symmetrical design of the thrust bearing Assembly electrodynamic and gas-static components of the reaction force of the proposed bearing Assembly, acting symmetrically and oppositely directed, automatically implement negative feedback on the deviation of the heel from the equilibrium position and do not require additional devices (sensors rejection and fast response regulators).

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 housing of the thrust bearing, which is 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 by sector elastic strip supported on them by the sectors of gas-static bearings, forming, respectively, the elastic ring gaskets and a ring of non-magnetic material, while the side sectors of getstaticexception, facing the heel, provided with a recess with a flat bottom formed by the flange around the perimeter of the sector of gas-static bearing, and in the recess of each sector is fixed pie permanent magnets forming circuit Halbach, which used magnets magnetized in the axial and tangential directions, the magnets magnetized in the axial direction, placed between contact with the side walls of the permanent magnets magnetized in the tangential direction, while the cross section of a lining attached to T-shaped, with shelves lining made with the possibility of engagement of the radial flange of the sectors of gas-static bearings, the external surface of the sector of permanent magnets is a single plane facing the heel, made of nonmagnetic material, with the formation of her working clearance gas-static bearing, in addition, the volume of the sectors bearing made system of communicating channels of small diameter with a possibility of it compressed air from an external source, the outlet of which is communicated with a through hole made in the sector permanent magnet connected with a working gap of gas-static bearing.

2. Thrust bearing Assembly under item 1, characterized in that the heel issue is Lana hollow and has an internal power frame.

3. Thrust bearing Assembly under item 1, characterized in that the elastic strip is made of steel with annular corrugations filled with encapsulation on both sides with a layer of rubber or polyurethane.

4. Thrust bearing Assembly under item 1, characterized in that the permanent magnets made from an alloy of neodymium-iron-boron.

5. Thrust bearing Assembly under item 1, characterized in that sector permanent magnets bonded to the sectors bearing glue.

6. Thrust bearing Assembly under item 1, characterized in that the surface of the heel, facing the thrust bearing, covered with a layer vysokoskorostnogo material, such as copper, and is made with high quality of surface finish.



 

Same patents:

FIELD: machine building.

SUBSTANCE: method for creation of porous deboosters (porous inserts (5, 6) in gasostatic bearings includes controlled mechanical treatment of surfaces of the deboosters (5, 6) by means of mechanical removal of surface part. At that treatment is performed by two stages with individual check of permeability of each treated deboosters (5, 6) by pressure and flowrate measurements of air passing through it. At first treatment stage the joint finishing face surface of casing and deboosters (5, 6) previously installed in it with certainly higher permeability prior to the treatment and with allowance for machining is made, and only geometrical accuracy of the surface is checked. At the second stage the layers of porous material are cut off separately for each deboosters (5, 6) from its rear surface until required permeability if the debooster (5, 6) is ensured as determined by flow rate and pressure. For this air is supplied to each debooster (5, 6) using the device (13) with tight securing to the face surface, and pressure and flowrate of the passing air are measured.

EFFECT: assurance of more effective in terms of labour input and used time method of porous deboosters manufacturing with specified permeability in the gasostatic bearings.

3 cl, 6 dwg

Hydrostatic bearing // 2537217

FIELD: machine building.

SUBSTANCE: invention relates to the machine building industry and can be used in radial and radial-axial supports of spindle assemblies of metal working machines and has an increased load characteristic with a range of negative flexibility. A bearing includes a housing, a shaft and a sleeve, the inner surface of which is provided with two annular rows of load-carrying pockets and which is installed in the housing on an elastic cover with cut-outs that form two annular rows of control chambers between the housing and the sleeve. In each chamber between the surfaces of the housing and the movable sleeve there is a throttling slot gap connected via a channel at the inlet to a hydraulic station and at the outlet to the load-carrying pocket, which is located in the other annular row. The control chambers have axial displacement relative to the load-carrying pockets. Connection channels connecting the control chambers to the load-carrying pockets are of a weakly throttling type. Attached surfaces of the housing, the shaft and the sleeve in the radial-axial bearing are of a conical type.

EFFECT: improving the radial and axial loading capacity of the bearing, as well as providing angular self-adjustment of the sleeve and negative flexibility of the bearing in radial and axial directions.

3 cl, 4 dwg

Hydrostatic bearing // 2534596

FIELD: machine building.

SUBSTANCE: hydrostatic bearing comprises shaft (1) and housing (2) with their conjugated surfaces making slit gap (9) of primary bearing ply of lubricant. Housing (2) has radial throttling channels (3) communicated with lubricant feed source (pf). Circular ledges are made at ends of housing (2) with circular membranes (4) fitted at their inner sides. Stiff rings are tightly secured inside membranes (4) to make, with shaft (1) and housing (2), axial and radial throttling slots (7, 8), respectively. Housing (2) has chambers (10) made in symmetry about central crosswise plane. Every said chamber communicates via appropriate radial channel (11) with slot gap (9) of primary bearing ply of lubricant.

EFFECT: improved dynamic characteristics of this bearing.

2 dwg

Hydrostatic support // 2534100

FIELD: machine building.

SUBSTANCE: hydrostatic support consists of stationary body (1) with bearing pockets (2) at opposed working surfaces and feed channel (3), moving guide (4) with opposed working surfaces connected with the body working surfaces, and floating element (5) with throttling channels (6) connected with control pockets (7) at its ends. Floating element (5) features cylindrical shape with circular ledge (8) at its top part and is arranged with minimum clearance in the body (1) cylindrical bore connecting the opposed pockets (2). Body (1) has recess (10) to surround circular ledge (8) without forming of throttling orifices. End surfaces of floating element (5) make said throttling orifices (9) with working surfaces of guide (4).

EFFECT: higher recommended load bearing capacity, absolutely ruled out contact friction, ease of assembly.

3 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

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

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

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 900C. 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 25C 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=rt. 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

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

Up!