Thrust bearing assembly

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

 

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 NC 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 NC 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 re the program seeks to ensure high load-carrying capacity of the thrust bearing unit in the operating mode (reduce it friction losses, until ventilation), reliable starting the turbomachine, 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 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 of nonmagnetic material, is 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 a recess, and the recess of each sector is fixed pie pole from a material with high magnetic permeability, between which is placed in contact with the sector permanent magnets with tangential counter magnetization, while the cross section of a lining attached to the T-shaped fo the mA with shelves lining made with the possibility of engagement of the radial flange sectors of the bearing, in addition, the sector permanent magnets attached to the trapezoidal cross-sectional shape, the broad base of which faces the surface of the notches of the sector bearing, in addition, with a narrow base of each sector of the permanent magnet contacts the wedge, made in the form of strips of non-magnetic material rigidly bonded with contact with it the adjacent sector of the poles, and the outer surface of the wedges and pie poles constitute a single plane facing the heel, made of nonmagnetic material, with the formation of her working gap, in addition, 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 in communication with the made in pie poles 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. In addition, the sector permanent magnets made from an alloy of neodymium-iron-boron, with sector fixed MAG is the ITA and the sector pole connected with the sectors bearing the adhesive. In addition, 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. In addition, the wedge is made in the form of a strip of nonmagnetic material such as nonmagnetic stainless steel.

Comparative analysis of the essential features 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 corps, fixation in the case of all elements and performance bearing (elastic strip and parts of gas-static and magnetic bearing).

A sign indicating that "at the bottom of the cylindrical recess posted elastic strip", provides the ability to automatically change the size of the working gap and the bearing capacity of gas-static and magnetic bearings.

A sign indicating that "gas-static bearing supported on the elastic strip", provides elastic automatic control of the working gap of gases adicheskogo and magnetic bearings.

Signs indicating that gas-static bearing is made in the form of a ring of nonmagnetic material, 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 and magnetic bearings 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 pie poles and sector permanent magnets in these grooves.

Signs indicating that "in the hollow of each sector is fixed pie pole from a material with high magnetic permeability, between which is placed in contact with the sector permanent magnets with tangential counter magnetization", provide the possibility of using electrodynamic forces to keep the heel, i.e., allow in addition to gas-static forces to provide an electrodynamic repulsive forces during the rotation of the heel without sticking segments of permanent magnets to the heel. This increases the bearing capacity and stiffness pornograficheskogo node.

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 bearing", provide installation clearance and free axial movement of the sectors bearing on the elastic strip along the axis of rotation within the deformation of the elastic strip.

Signs indicating that "pie permanent magnets attached to the trapezoidal cross-sectional shape, the broad base of which faces the surface of the notches of the sector", and "with a narrow base of each sector of the permanent magnet contacts the wedge, made in the form of strips of non-magnetic material rigidly bonded with contact with it the adjacent sector of the poles will cause the direction of the main part of the magnetic flux in the area of the working gap of the thrust bearing unit for receiving considerable electrodynamic forces.

Signs indicating that the outer surface of the wedges and pie poles constitute a single plane facing the heel, made of nonmagnetic material, ensure the formation of the working gap, and reduce the deformation of the surface of gas-static bearing.

Signs indicating that the thrust bearing unit in the amount of sectors bearing done is on a system of communicating channels with a possibility of it compressed air from an external source, the outlet port which is in communication with the made in pie poles through holes communicating with the working gap, allow to organize the supply of lubricating 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 the turbine and compressor due to the dissipation of the vibration energy of rubber or polyurethane.

A sign indicating that "pie permanent magnets made from an alloy of neodymium-iron-boron, provides considerable electrodynamic forces due to the interaction of eddy currents, UAI is effected in the heel of the magnetic sector field of 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 the sector pole connected with the sectors bearing glue"that provides the solidity of the segmented permanent magnets with sectors of the bearing, and thus enhances the efficiency 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 quality of surface finish", provides increased eddy currents and thereby electrodynamic forces.

A sign indicating that the wedge is made in the form of a strip of nonmagnetic material such as nonmagnetic stainless steel, clarifies the material from which made the wedge and its shape.

In Fig.1 shows a longitudinal section, and Fig.2, 3, 4 is a cross-sectional view of the thrust bearing Assembly by sector bearing, sector permanent magnets and the heel, respectively. In Fig.5 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, non-magnetic plates 6, the heel 7, a flange 8, sector permanent magnets 9, 10, pie poles 11, 12, 13, the wedge 14, the working gap 15, the internal power Kark is 16, radial holes 17, the tangential channels 18, the socket 19, the sealing rings 20, 21, the openings 22 in the housing 1, the axial bore 23 in sectors 5 of the bearing, the axial bore 24 in the sector poles 11, 12, 13, the cover 25, the stub 26.

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 the alloy 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 of non-magnetic material. Gas-static bearing evenly divided into sector 5, radially oriented non-magnetic metal plates 6, fixed to the body 1 of the thrust bearing. From the side adjacent to the heel 7, the perimeter of the sector 5 provided with a flange 8 forming the recess. In the recess of each sector 5 evenly distributed around the circumference and fixed (e.g., glue), at least two pie permanent magnets 9,10, performed the, for example, from an alloy of neodymium-iron-boron, magnetized in opposite tangential direction (along the circumference), and contact with them pie poles 11, 12, 13, made of alloy with high magnetic permeability, for example CP.

The cross section of the metal non-magnetic plates 6 attached to T-shaped, with shelves lining 6 is arranged to engage the radial shoulder 8 pie permanent magnets 9, 10.

Pie permanent magnets 9, 10 attached to the trapezoidal cross-sectional shape, the broad base of which faces the surface of the excavation of sector 5 of the bearing, and with a narrow base of each sector of the permanent magnet 9, 10 contacts the wedge 14 made in the form of a strip of nonmagnetic material such as nonmagnetic stainless steel. The wedge 14 is rigidly bonded with contact with it the adjacent sector of the poles. The outer surface of the sector of the poles 11, 12, 13 and pins 14 are single plane facing the heel 7, with the formation of her working gap 15. The heel 7 is made of a hollow of a nonmagnetic electrically conductive material and has an internal power frame 16.

The volume of each sector 5 bearing made system of communicating radial holes 17 and tangential channels 18 with the possibility of filing them in compressed air from the outside and the source (not shown) through the socket 19 with wearing them o-rings 20, 21. The fittings 19 can move freely in the holes 22 of the housing 1 within the deformation of the corrugations 4. In radial holes 17 sectors 5 bearing made of the axial bore 23, communicating with the axial hole 24 in the sector poles 11, 12, 13 facing in the working gap 15 gas-static bearing. The diameter of the radial holes 17 sector 5 should be minimal, but the total area of bore these holes should be larger than the total area of the axial holes 23, 24 of sector 5 in three-five times, and the area of orifice tangential channel 18 sector 5 must be greater than or equal to the total of the cross-section area of radial holes 17 sector 5 that will allow to reduce deformation of the axial working gap 15 from the high pressure gas in these holes.

Tangential channels 18 are closed by caps 25, radial holes 17 provided with a plug 26. Gas-static bearing formed facing each other of the end surfaces of the sector of the poles 11, 12, 13, non-magnetic wedges 14, sector poles 11, 12, 13 and heel 7 form a magnetic bearing.

Thrust bearing Assembly assemble in the following order. Pre-made case 1 thrust bearing holes 22 and sector 5 with radial holes 17 and tangential channels 18. Tangential channel 18 is closed, Crisco is 25 and scald its perimeter, and then smooth out the welds. In case 1 thrust bearing fix (glue) elastic washer 3 required rigidity, which is pre-punched and thermoablative, for forming annular corrugations 4, and to the corrugation, in turn, prevulcanized with two sides rubber or polyurethane. Forth between the sector poles 11, 12, 13, pre-arranged layout, establish non-magnetic wedges 14, weld them together with the formation of a flat surface, polished outer surface and cover it antifriction material, such as WAP-2. In the notches between the sector poles 11, 12, 13 glued pie permanent magnets 9,10 and then paste the resulting sets in sectors 5 of the bearing. Drill axial feed holes 24 in the sector poles 11, 12, 13 and the axial feed holes 23 in sectors 5, clean them and set the ends of radial holes 17 of the stub 26. The gasket 3 evenly spaced around the circumference install (glue) metal non-magnetic sectors 5 of the bearing and between them set radially oriented non-magnetic metal plates 6, which are fixed, for example by 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 the beginning of the rotation system-easy installation the I heel 7 through the openings 22 in the housing 1 thrust bearing, the fittings 19 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 18 and then spread through the radial holes 17 sector 5, and then through the axial feed holes 23 in sectors 5 and the axial bore 24 in the sector poles 11, 12, 13 enters the working gap 15 of the thrust bearing Assembly. 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 with a field of these magnets. The axial component of the electrodynamic forces acting repulsive way between fifth 7 and sectoral poles 11, 12, 13. This force is summed with the forces of gas-static bearing force at the heel 7. In the result due to the deformation of the corrugations 4 elastic strip 3 increases the axial working gap 15 in the thrust bearing unit and at the same time, due to the increase in axial working gap 15 is significantly reduced friction in the thrust bearing unit. The corrugations 4 and the damping of the elastic strip 3 also allow you to compensate for thermal deformation of the abutment 7. The tangential component of the electrodynamic force has brake the total impact, but it is not significant. With increasing linear velocity on the surface of the heel 7 of the repulsive component of the electrodynamic force is increased, and the braking is reduced. To increase the eddy currents in the heel 7 and, consequently, the electrodynamic forces the thrust bearing Assembly is used, the plating surface of the heel 7 facing the sector permanent magnets 9, 10 and sectoral poles 11, 12, 13, and the processing of this surface with high purity.

When bilateral, symmetrical design of the thrust bearing Assembly magnetic and gas-static components of the reaction force of the proposed bearing Assembly, acting symmetrically and oppositely directed, automatically implement negative feedback deviation heel 7 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 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, the imp is United in the form of a ring, of a nonmagnetic material, is 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 a recess, and the recess of each sector is fixed pie pole from a material with high magnetic permeability, between which is placed in contact with the sector permanent magnets with tangential counter magnetization, 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, in addition, the sector permanent magnets attached to the trapezoidal cross-sectional shape, wide base drawn to the surface of the notches of the sector bearing, in addition, with a narrow base of each sector of the permanent magnet contacts the wedge, made in the form of strips of non-magnetic material rigidly bonded with contact with it the adjacent sector of the poles, and the outer surface of the wedges and pie poles constitute a single plane facing the heel, made of nonmagnetic material, with the formation of her working gap, in addition, the volume of the sectors bearing made system of communicating channels with a chance to view the th submission to it of compressed air from an external source, the outlet port which is in communication with the made in pie poles through holes communicating with the working gap.

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

3. Thrust bearing Assembly under item 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.

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

5. Thrust bearing Assembly under item 1, characterized in that sector permanent magnets and the sector pole connected with 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.

7. Thrust bearing Assembly under item 1, characterized in that the wedge is made in the form of a strip of nonmagnetic material such as nonmagnetic stainless steel.



 

Same patents:

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

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 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

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

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!