Assembly of hydrodynamic ribbon bearing

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

 

This invention relates to a node hydrodynamic tape bearing for use in rotating machines.

Hydrodynamic tape bearings are proposed for improvement of operational parameters of conventional hydrodynamic bearing for rapidly rotating systems. The principle of operation of the tape bearing is based on the formation of a film of the compressed fluid in the annular gap between the outer periphery of the rotating shaft and the bearing surface formed or multiple tape inserts, or a single liner of the corrugated ribbon. This film compressed fluid works as a layer of lubricant, reducing the friction force between the outer periphery of the rotating shaft and the inner surface of the wall of the tape liner during operation, and allows the bearing can effectively withstand a high load. Due to this film, the compressed fluid rotating shaft rotates, floating in the air, and maintains a given distance from the tape liner. Film of the compressed fluid in the annular gap between the outer periphery of the rotating shaft and the inner surface of the wall of the tape liner is formed when the rotating shaft rotates with a certain speed.

A potential advantage of tape bearings on hydrostatics the mi bearings, is the presence of an external source of compressed fluid, which is enough simplifies the use of hydrodynamic bearings for rotating machinery. Moreover, due to the flexibility of the tape liner bearings of this type are less sensitive to the quality of surface finish and possible misalignment of the rotating shaft and housing during Assembly. In addition, the use of tape bearings provides the desired characteristics of rigidity of the bearings and the suppression of manifestations of instability. The compressed film of fluid is formed in the gap between the outer periphery of the rotating shaft and the tape liner only when the rotating shaft rotates at a certain speed. To achieve this a certain speed, the rotating shaft need to accelerate from zero speed. At zero speed, since no clearance film of the compressed fluid, the outer periphery of the rotating shaft is in direct contact with the inner surface of the belt pad. This leads to the dry friction during cycles of starting and stopping, which inevitably leads to rapid wear of the surface of the tape bearing. Thus, the maximum lifetime is mainly determined by the strength of the material of the bearing or, in other words, the total number of the STV cycles start and stop.

US 5885004 reveals hydrostatic supported tape bearing containing the bearing housing with plenty of holes for passing the fluid in the bearing housing. Tape the bearing further comprises a set of inserts, each of which has a hole, and many liners form a cylindrical cavity for receiving a rotating axle. In addition, the tape bearing includes means for supplying mentioned fluid from the above-mentioned hole of the above mentioned bearing housing into the gap between the many tape inserts and said rotating axle through the mentioned openings tape inserts for the formation of a film of the compressed fluid in the gap.

EP 0812996 A2 discloses a system for hydrostatic strengthening permissible axial load double-sided elastic hydrodynamic axial tape bearing for a turbomachine. Select air from the turbomachine is used to enhance the permissible axial load tape bearing.

The objective of the invention is to eliminate or at least minimize the above problems.

The above problem is solved by using the node hydrodynamic tape bearing containing the bearing housing, and the said bearing housing contains open the e to ensure the flow of the fluid in the bearing housing, at least one tape liner, and mentioned at least one tape liner contains at least one hole and restricts cylindrical cavity for receiving it rotating shaft, and means for supplying fluid from the bore of the bearing housing into the gap between the said at least one tape liner and rotating shaft through the mentioned at least one hole mentioned at least one tape liner to form a film of the compressed fluid in the gap.

Thus, guaranteed additional supply of lubricant in the gap between the outer periphery of the rotating shaft and the inner surface of the belt pad. Moreover, the film formation of the compressed fluid in the gap prevents dry friction by preventing contact between the rotating shaft and the tape liner, thereby reducing the wear of the surface of the tape bearing. In addition, film formation of the compressed fluid in the gap prevents dry friction and thereby reduces the wear surface of the belt bearing, preventing contact between the rotating shaft and the tape liner.

In accordance with the embodiment, fluid is pumped from the hole of the bearing housing into the gap between the said at least one belt on which we breathe and the rotating shaft during the cycle start and cycle stop.

This ensures that the dry friction reduction by preventing contact between the rotating shaft and the tape liner during the cycle start and cycle stop.

In accordance with another embodiment, the means includes a conduit for transporting the fluid from the bore of the bearing housing, at least one connector containing at least one element, and that at least one element takes the fluid from the channel, and at least one leg of the tape liner containing the channel at one end and brought into engagement with the hole mentioned at least one tape liner on the other end, and a channel is inserted at one end mentioned, least one element.

Thus, the supply of fluid to the tape liner is that it has no impact on the operating parameters of the tape liner.

In accordance with another embodiment, the bearing housing further comprises a draw plate, located inside the bearing housing, and these draw plate contain a paw and grooves for receiving the feet of draw plates.

In accordance with another embodiment, draw plate additionally contain at least one hole for providing arise the population mentioned, at least one element to the end of the channel mentioned at least one pin strip insert.

Thus prevents deformation of the elements, and thus guaranteed the position and orientation of the geometry of the fluid flow.

In accordance with another embodiment, draw plate additionally contain a hole for providing flow of fluid in said at least one connector.

In accordance with another embodiment, the connector is made of elastic material.

This eliminates the influence of elements of the connector on the operational parameters of the tape liner.

In accordance with another embodiment, the aforementioned at least one connector includes a cover containing a cavity for distributing the fluid in said at least one element.

In accordance with another embodiment, the aforementioned at least one connector further comprises a hole to guarantee the flow of fluid to the lid.

In accordance with another embodiment, the hole mentioned at least one tape liner is a slit hole passing longitudinally.

In accordance with another variations is that the implementation node hydrodynamic tape bearing further comprises spacers, mounted in the slotted holes mentioned, at least one tape liner to provide a constant clearance slot.

In accordance with another embodiment, the aforementioned at least one tape liner is a liner of the corrugated ribbon.

In accordance with another embodiment, the liner of the corrugated tape contains a slot extending longitudinally to impart increased rigidity.

In accordance with another embodiment, the node hydrodynamic tape bearing further comprises a spacer spring, mounted on top of the liner of the corrugated strip, and an expansion spring contains the jumper and the jumper is aligned over the slot to prevent leakage of fluid out of the gap.

In accordance with another embodiment, the fluid medium is air.

Further description of this invention given below with reference to illustrated embodiments of shown in the accompanying drawings, in which:

figure 1 shows a perspective representation of the node hydrodynamic tape bearing in accordance with the described option Khujand the exercise;

on figa shows the liner of the corrugated ribbon, introduced in engagement with many feet of tape in accordance with the described of the embodiment;

on fig.2b detail showing the sealing sleeve;

in figure 2, with detail showing the spacer;

figure 3 shows the cross section of the node 1 hydrodynamic tape bearing according to figure 1;

on figa detail showing the spring;

on fig.4b detail showing the spacer spring;

figure 5 shows more detail of a split washer 29;

on figa detail showing the connector;

on fig.6b detail showing the cover;

figure 7 shows more detail of draw plate;

on Fig detail showing the spacer sleeve;

figure 9 presents a detailed view of the nut;

figure 10 illustrates the discharge of fluid from the channels of the legs of the tape liner in a cylindrical cavity bounded by the liner of corrugated ribbons;

figure 11 presents a cross-section of the bearing, illustrating the detailed mechanism of the fluid; and

on Fig presents an enlarged image of the area within the rectangle marked in figure 11.

Detailed description of the invention

Different ways of implementation will be described with reference to the accompanying drawings, where the same position is always used to denote identical elements. the purposes of explanation, in the following description describes numerous specific details to provide a complete understanding of one or more embodiments. It should be obvious that the practical embodiment of such embodiments are possible without these specific details.

Figure 1 shows a perspective representation of the node hydrodynamic tape bearing in accordance with the described of the embodiment. Node 1 hydrodynamic tape bearing includes a housing 3 of the bearing and the hole 4. Case 3 bearing typically has a hollow cylindrical cross-section, at least one tape liner (not shown), bounding a cylindrical cavity for receiving it rotating shaft 11, which is located inside the housing 3 of the bearing. Between the inner surface of the wall mentioned, at least one tape liner and the outer periphery of the rotating shaft 11 is limited to the gap.

In one embodiment, the inside of the bearing housing may be there are many belt pads, so that the inner surface of the walls of the tape liners restrict cylindrical cavity for receiving it rotating shaft 11. In an alternative embodiment, inside the housing 3 of the bearing can be located the liner of the corrugated ribbon. NR the inner surface of the wall of the liner of the corrugated ribbon limits cylindrical cavity for receiving it rotating shaft 11.

Node 1 bearing tightened with nuts 7 at the ends. The nut 7 has a hole 9, so that the rotating shaft 11 can be inserted into the node 1 of the bearing. The fluid can be fed into the housing 3 of the bearing through the hole 4.

Fluid supplied to the housing 3 of the bearing, inside it goes into the gap between the inner surface of the wall mentioned, at least one tape liner and the outer periphery of the rotating shaft 11 through the hole in said at least one tape liner. Fluid in the gap forms a compressed film and therefore acts as a lubricant between the inner surface of the wall mentioned, at least one tape liner and the outer periphery of the rotating shaft 11. Moreover, a compressed film of fluid prevents contact of the outer periphery of the shaft with the inner surface of the wall mentioned, at least one tape liner.

In one embodiment, the fluid can be fed into the gap between the internal surface of the tape liner and the outer periphery of the rotating shaft 11 during the cycle start and stop rotating shaft 11. During the cycle of starting and stopping the rotation speed of the rotating shaft 11 below the critical speed. This prevents contact with the external periphery of the rotating shaft 11 EXT is na surface mentioned, at least one tape liner and thereby reduces dry friction.

In this embodiment, fluid supplied to the node 1 of the bearing, is the air. However, in case 3 of the bearing can be submitted and other gases or liquids that are suitable to act as a lubricant. The air can be fed from a compressed air system through the opening 4.

On figa shows the liner of the corrugated ribbon, introduced in engagement with many feet of tape in accordance with the embodiment of the invention. The liner 15 of the corrugated tape typically has a hollow cylindrical cross-section, bounding a cylindrical cavity 17. The cylindrical cavity 17 of the liner 15 accepts shown in figure 1 of the rotating shaft 11 when the latter is inserted in the node 1 of the bearing shown in figure 1 through the opening 9 of the nut 7, as shown in figure 1. With the liner 15 of the corrugated ribbon introduced engages the legs 19 of the liner, missing one end through the slit openings 23 limited in the liner 15 of the corrugated ribbon. The other end of the legs 19 of the tape liner contains the channel 21. Channel 21 contains ferrules 22, soldered with hard solder on both ends. The legs 19 of the belt pad is soldered with hard solder on both sides to ensure complete tightness. G is ometry legs 19 of the tape liner can be changed depending on the desired pressure of the fluid required in slotted holes 23.

On fig.2b sealing sleeve 22 is shown in detail. Sealing sleeve 22 has a hollow cylindrical cross-section and soldered with hard solder on the ends of the cylindrical channel 21 of the leg 19 of the tape liner.

Returning to figa, note that the liner 15 of the corrugated ribbon obtained by bending sheet metal, for example steel. Spacers 18 are soldered with hard solder or fastened by spot welding in the slotted holes 23 on the liner 15 of the corrugated ribbon. For example, the spacers 18 can be soldered with hard solder or secured by spot welding in the slotted holes 23 in the flexible liner 15 of the corrugated ribbon. Spacers 18 ensures the clearance slot, providing the desired cross-sectional area and geometry of the duct for the fluid. The number of pinned or soldered with hard solder spacers 18 may vary depending on the desired pressure of fluid in the slit openings 23. On figs detail showing the spacer 18.

Returning to figa, note that fluid from the channel 21 is blown into the gap between the internal surface of the liner 15 of the corrugated tape and the outer periphery of the rotating shaft 11 through the ducts, the limited space between struts 18. The liner 15 from gofer the private tape also contains the slot 24 to impart the desired rigidity. The slot 24 provides radial deformation of the liner 15 of the corrugated tape during rotation of the rotating shaft 11, thereby giving the desired rigidity and minimizing damage.

Figure 3 shows the cross section of the node 1 hydrodynamic tape bearing according to figure 1. Shown in figure 3 illustrates the cross section of the node 1 bearing, comprising a housing 3 of the bearing, 4 hole, the liner 15 of the corrugated tape and the rotating shaft 11 inserted into the housing 3 of the bearing through the hole 9 in the nut 7 and received by the liner 15 of the corrugated ribbon.

Channel 25 provides duct supplied to him in a fluid medium. On top of the liner 15 of the corrugated ribbon installed the springs 26. Spring 2 6 ensure the damping of the vibrations due to the extra rigidity to the liner 15 of the corrugated ribbon. In addition, the springs 26 provide proper clearance between the outer periphery of the liner of the corrugated ribbon and the inner surface of the casing wall 3 of the bearing.

On figa detail showing the spring 26. The spring 26 is received by bending of sheet metal, for example steel, and has a periodic profile.

Returning to figure 3, note that on top of the liner 15 of the corrugated ribbon installed an expansion spring 27 that contains a jumper (not shown), so that the retainer spacer spring 27 vyrovnennaya slot 24, shown in figa, liner 15 of the corrugated ribbon. This jumper prevents contact of the outer periphery of the rotating shaft 11 and the inner surface of the wall spacer spring 27 through the gap of the slot 24. In addition, an appropriate design of the jumper can reduce leakage of fluid from the liner 15 of the corrugated ribbon through the slot 24. Slotted washer 29 to securely hold the liner 15 of the corrugated strip, the springs 25 and spacer spring 27 inside the housing 3 of the bearing. In grooves (not shown)provided on the inner surface of the housing 3 of the bearing, are slotted washer 29.

On fig.4b detail showing an expansion spring 27. An expansion spring 27 is received by a flexible sheet metal, such as steel, and includes a crosspiece 28. Jumper 28 prevents contact of the outer periphery of the rotating shaft 11 and the inner surface of the wall spacer spring 27 through the clearance slot 24 shown in figa.

Figure 5 shows more detail of a split washer 29. Split washer 29 has a slit 30 and is installed in the groove provided on the inner surface of the housing 3 of the bearing shown in figure 3.

Returning to figure 3, note that inside the case 3 of the bearing provided by the connectors to feed into the channels of the legs 21 of the tape liner. The connectors contain elements 32, which are inserted in once channels 21 of the legs 19 of the tape liner. These elements serve the fluid in the channels 21 of the legs 19 of the tape liner. Inside the housing 3 of the bearing are spunbond plate 34. The elements 32 of the connector 31 is inserted in the ends of the cylindrical channel 21 of the leg 19 of the belt insert-through holes 33 in the spunbond plates. Draw plate 34 prevents the deformation of the element 32, and hence guarantee the position of the elements 32 and orientation of the geometry of the flow of fluid.

The connectors 31 contain the cover 37 having a circular cavity. The circular cavity of the cap distributes the fluid in the elements 32. The elements 32, in turn, serves the fluid in the channels 21 of the legs 19 of the tape liner. Fluid from the channel 25 is supplied to the cover 37 through the opening 42 in the spunbond plate 34 and the hole 33 in the connector 31.

In each of the elements 32 is inserted spacers 35 as to achieve a constant flow area mates during the warpage of rubber in the process of tightening the nuts 7. The bearing tighten with nuts 7 on the ends.

On figa detail showing the connector. The connector 31 contains many elements 32. The elements 32 are inserted in the ends shown in figure 3 of the channel 21 of the legs 19 of the tape liner shown in figure 3, and thereby the flow of fluid from the hole 4, as shown in figure 3, the channels 21. The hole 33 provides tip is of the fluid in the cover 37, shown in figure 3. The connector 31 may be made of an elastic material, such as heat-resistant rubber such as silicone rubber or heat-resistant and elastic plastic. In an alternative embodiment, the connectors 31 may be made of any heat-resistant and elastic material, so that the connectors 31 are capable of withstanding the operating pressure of the fluid. The property of elasticity of the connectors 31 adds significant flexibility to the feed mechanism of the fluid, preventing the influence of the elements 32 on the operating parameters of the liner 15 of the corrugated ribbon, shown in figure 3.

On fig.6b detail showing the cover 37. Cover 37 includes a circular cavity 38 for distributing the fluid in shown in figa elements 32 of the connector 31 shown in figa.

Figure 7 shows more detail of draw plate 34. Spunbond plate 34 contains a number of holes 39. The elements 32, shown in Fig.6, are inserted in the ends of the channels 21, shown in figure 3, through these holes 39. The hole 40 provides a flow of fluid from the shown in figure 3 of the channel 25 is shown in figure 6 hole 33 is shown in Fig.6 connector 31.

Spunbond plate 34 contains paw 41 for mounting the draw plate 34 inside the housing 3 of the bearing shown in figure 3. The claw 41 is enclosed in the groove provided in the housing 3 is of Podshipnik, so the positioning of the feet is secure.

On Fig detail showing the spacer sleeve 35. Spacer sleeve 35 contains 4 hole 3 and is inserted into the shown in Fig.6 element 32 shown in Fig.6 connector 31 through the opening 43.

Returning to figure 3, note that the rotating shaft 11 is inserted into the housing 3 of the bearing through the hole 9 in the nut 7 is enclosed in a cylindrical cavity bounded by the liner 15 of the corrugated ribbon. Between the outer periphery of the rotating shaft 11 and the inner surface of the wall of the liner 15 of the corrugated tape a gap.

Figure 9 presents a detailed view of the nut 7. Nut 7 has an opening 9 through which is shown in figure 3 of the rotating shaft 11 can be inserted is shown in figure 3, the node 1 of the bearing. Nut 7 is used to tighten the node 1 of the bearing.

Figure 10 illustrates the discharge of fluid from the channels 21 of the legs 19 of the tape liner in the cylindrical cavity 17, the limited liner 15 of the corrugated ribbon. The cavity 17 receives the rotating shaft 11, shown in figure 3, and between the outer periphery of the rotating shaft 11 and the inner surface of the wall of the liner 15 of the corrugated tape a gap. Fluid injected into the cylindrical cavity 17, forms a compressed film in the gap. To ensure the best Poneman is e, the rotating shaft 11, shown in figure 3, and the gap is not shown here. Fluid channel 21 of the legs 19 of the tape liner is fed into the cylindrical cavity 17 through the slotted holes 23 of the liner 15 of the corrugated ribbon. Fluid channel 21 is blown into the slotted holes 23 through the ducts 45, limited by spacers 18. Arrows indicate the course of the fluid in the cylindrical cavity 17.

Fluid injected into the element 17, which is a cylindrical cavity, forms a film of the compressed fluid in the gap between the internal surface of the liner 15 of the corrugated tape and the outer periphery of the rotating shaft 11, shown in figure 3. In one embodiment of the fluid can be pumped into the gap between the rotating shaft 11 and the element 17, which is a cylindrical cavity for the formation of a film of the compressed fluid only during the cycle start and stop, thus avoiding the need for a constant supply of compressed fluid. In order to apply the fluid only during the cycle of starting and stopping, the 4 hole in the bearing housing may be locked when the rotating shaft 11 rotates. The flow of fluid is shown in figure 1, the housing 3 of the bearing can be blocked by the lock shown in figure 3 holes 4 of the housing 3 of the bearing, as shown in figure 3.

the Lenka compressed fluid medium, formed in the gap acts as a lubricant between the outer periphery of the rotating shaft and the inner surface of the wall of the liner 15 of the corrugated ribbon. In addition, the film of the compressed fluid, moving in the gap prevents contact of the outer periphery of the rotating shaft 11, shown in figure 3, and the inner surface of the wall of the liner 15 of the corrugated ribbon. This will minimize the dry friction between the rotating shaft 11 and the liner 15 of the corrugated tape during cycles of starting and stopping. Therefore, the service life of the liner 15 of the corrugated tape increases as minimized heavy wear surface.

Figure 11 presents the cross section of the node 1 bearing, illustrating the detailed mechanism of the fluid. 4 hole acts as an intake, and fluid is supplied to the bearing through the hole 4. Of holes 4 fluid flows through the channel 25. Thereafter, fluid is supplied to the cover 37 through is shown in Fig.7. the hole 42 draw plate 34 and shown in figa hole 33 of the connector 31. Cover 37 distributes the fluid in the elements 32 of the connector 31. The elements 32 serves the fluid in the channels 21 feet of tape liner. Fluid channel 21 is blown in shown in figa slotted holes 23 shown in figa liner 15 of the corrugated ribbon. Article the tree indicate the direction of flow of the fluid inside the node 1 of the bearing.

On Fig presents an enlarged image of the circled area shown figure 11. Fluid to be shown on channel 11 25 enters the cover 37 through is shown in Fig.7. the hole 42 draw plate 34 and shown in figa hole 33 of the connector 31. After this fluid is distributed in a cylindrical channel 21 through the elements 32 of the connector 31. From the cylindrical channel 21 fluid is pumped into the liner 15 of the corrugated ribbon, shown in figa. Depicted on Fig arrows indicate the direction of flow of the fluid.

As described here implement provide an additional supply of lubricant in the gap between the outer periphery of the rotating shaft and the inner surface of the wall of the tape liners or liner of the corrugated ribbon in the hydrodynamic foil bearing. Depending on the needs of this lubrication can be served during any of the cycles start and stop intermittently or continuously. In addition, film formation of the compressed fluid in the gap prevents dry friction by preventing contact between the rotating shaft and the tape liner, thereby reducing the wear of the surface of the tape bearing. In addition, the supply of the compressed fluid in the gap during operation of the bearing greatly increases the load capacity of the bearing.

Although this invention is described in detail with reference to some preferred embodiments of, it should be understood that the invention is not limited to these options for implementation. On the contrary, in view of the foregoing description, which describes best current way of practical implementation of the invention, for specialists in this field technicians themselves will become apparent that many modifications and changes falling within the scope and substance of the claims of this invention. Therefore, the scope of claims of the invention indicated by the following claims and not the foregoing description. All changes, modifications and variations that are within the meaning and range of equivalency of the claims should be considered within its scope.

1. Node hydrodynamic tape bearing, comprising a housing (3) of the bearing, and the above-mentioned case (3) of the bearing contains a hole (4) to provide a flow of fluid in the above-mentioned case (3) bearing at least one tape liner, and mentioned at least one tape liner contains at least one hole and restricts cylindrical cavity for receiving it rotating shaft (11), and means for supplying mentioned fluid from the said holes (4)the above-mentioned case (3) of the bearing in the gap between these, at least one tape liner and the above-mentioned rotating shaft (11) through the mentioned at least one hole mentioned at least one tape liner to form a film of the compressed fluid in the gap, characterized in that the above mentioned hole, at least one tape liner is a slit opening (23), passing longitudinally.

2. Node hydrodynamic tape bearing according to claim 1, in which the mentioned fluid is supplied from the above-mentioned holes (4) of the said housing (3) bearing in said gap between the said at least one tape liner and the above-mentioned rotating shaft (11) during the cycle start and cycle stop.

3. Node hydrodynamic tape bearing according to claim 1 in which the means includes a channel (25) for transporting mentioned fluid from the said holes (4) of the said housing (3) bearing at least one connector (31), containing at least one element (32), and the aforementioned at least one element (32) takes the mentioned fluid environment of the mentioned channel (25), and at least one leg (19) of tape liner containing the channel (21) one end and brought into engagement with the said hole mentioned, less than the least one tape liner on the other end, and the said channel (21) is inserted at one end of the said at least one element (32).

4. Node hydrodynamic tape bearing according to claim 3 in which the said housing (3) bearing further comprises a draw plate (34)positioned within the said housing (3) of the bearing, and mentioned draw plate (34) contain the paw (41), and groove to receive the said legs (41) of the said draw plates (34).

5. Node hydrodynamic tape bearing according to claim 4, in which the mentioned draw plate (34) additionally contain at least one hole (39) to ensure the insertion of the mentioned at least one element (32) in the above mentioned end of the channel (21) mentioned at least one leg (19) of tape liner.

6. Node hydrodynamic tape bearing according to claim 5, in which the mentioned draw plate (34) additionally contain a hole (42) to provide the mentioned flow of fluid in said at least one connector (31).

7. Node hydrodynamic tape bearing according to claim 3 in which the said connector (31) is made of elastic material.

8. Node hydrodynamic tape bearing according to claim 3, in which the mentioned at least one connector (31) includes a cover (37), containing a cavity (38) for distribution mentioned fluid medium in said at least one element (32).

9. Node hydrodynamic tape bearing of claim 8, in which the mentioned at least one connector (31) further comprises a hole (33) to guarantee the mentioned flow of fluid to the said cover (37).

10. Node hydrodynamic tape bearing according to claim 1, additionally containing spacers (18)secured in the slotted holes (23) of the said at least one tape liner to provide a constant clearance slot.

11. Node hydrodynamic tape bearing according to claim 1, in which the mentioned at least one tape liner is a liner (15) of the corrugated ribbon.

12. Node hydrodynamic tape bearing according to claim 11, in which the said insert (15) of the corrugated tape contains a slot (24)extending longitudinally to impart increased rigidity.

13. Node hydrodynamic tape bearing on p.12, optionally containing spacer spring (27)mounted over the said liner (15) of the corrugated ribbon, and mentioned spacer spring (27) contains the jumper (28), and the aforementioned jumper (28) are aligned to the above mentioned slot (24)in order to prevent leakage of the aforementioned fluid from the above-mentioned gap.

14. Node hydrodynamic tape bearing according to claim 1, in which the mentioned fluid medium is air.



 

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Hydrostatic bearing // 2453739

FIELD: machine building.

SUBSTANCE: proposed bearing comprises housing with radial restricting and annular lubrication injection channels, shaft and driving washer with radial restricting channels arranged between housing and shaft to make slotted restricting gaps with mated surfaces of said shaft and housing. Pockets are arranged on outer cylindrical surface of said driving washer. Extra radial and circular channels are made along edges of housing and washer. There is a slotted stepped restricting gap between washer and shaft. Seals are fitted between face surfaces of housing and driving washer.

EFFECT: expanded active range of loads and better manufacturability.

2 dwg

FIELD: mechanical engineering.

SUBSTANCE: gas axial bearing with a body (1) comprises a bearing bushing with a bushing body (6) which detects a longitudinal axis (9) and comprises a number of sockets (16) provided on an outer side of the bushing body (6) and a number of capillary holes (17) passing from a socket (16) bottom through the bushing body (6) to its inside face. The bushing body (6) in each section passing across the longitudinal axis (9) through one of the capillary hole (17) has a locally thicker wall than in the direct surroundings of the capillary hole (17). The inside face of the body (1) has at least one channel (14) through which a number of sockets (16) are connected with each other. What is also presented is a compressor with said bearing.

EFFECT: production of the gas axial bearing with the improved bearing bushing having precisely produced small feed holes and high shape stability and applicability of such bearing bushing.

12 cl, 6 dwg

Spindle assembly // 2449185

FIELD: machine building.

SUBSTANCE: spindle assembly consists of housing (1) made in the form of a pipe with end walls, one of which, i.e. cover plate (8), is located in close proximity to cutting tool (7), and the other one, i.e. flange (6), is located in close proximity to turbine wheel of drive (11). Spindle (4) is installed so that it can be rotated in radial and thrust bearings located on opposite ends of spindle. The first thrust bearing is located in close proximity to turbine drive of spindle (4) and formed with centre pivot (2) and wall of flange (6), in which porous gas flow limiters (10) are made. The second thrust bearing is formed with wall of cover plate (8) with porous flow limiters (10) and centre pivot (2). In radial gas static bearing (5) which is located on the side of tool (7) there installed is magnetic conductor (3) which forms gas magnetic bearing (9) together with bearing (5).

EFFECT: improvement of spindle assembly by changing its design allowing to provide the increase in cutting load of assembly owing to additional magnetic force which is created in radial bearing.

2 dwg

FIELD: machine building.

SUBSTANCE: conic leaf-type friction bearing consists of bush enveloping journal of shaft. On internal surface of the bush there are made slots wherein there are inserted leafs. The leaves are protected from falling out with end covers screwed to a case of the bearing. In the middle of the bearing there is an amount of radial orifices multiple to the amount of leaves for supply of gas under pressure and for facilitation of additional gas-static pressure in a working area.

EFFECT: conic leaf-type friction bearing increases reliability and service life of bearing unit, endurance, stability of motion and suppression of shafts and rotors runout owing to additional gas-static pressure in working area.

7 dwg

Bow spring // 2364772

FIELD: mechanical engineering.

SUBSTANCE: invention refers to resilient elements of blade gasodynamic bearings used in small-sized high-speed turbomachines. The spring cut out from one plate contains multiple elementary arc-shaped springs (2) and (3). Springs (2) and (3) are located alternatively. Short springs (2) have equal length between reference edges. Long springs (3) also have equal length. The elementary springs (2) and (3) are interconnected by narrow bonding strips (8). Variable dependence of bow spring total tension on load is achieved due to difference in lengths for springs (2) and (3). Variable tension of bow spring in direction of elementary springs location is achieved due to variable width for springs (2) and/or variable width for springs (3).

EFFECT: reduction of shaft and bearing friction surfaces deterioration at start and stop of turbine rotor, reduction of rotor radial shift in bearing under action of heavy load and providing high limit carrying capacity of bearing at high rotor speed, providing assignment of various maximum inflection values to elementary springs and providing ease of bow spring manufacturing.

7 cl, 12 dwg

FIELD: mechanics.

SUBSTANCE: proposed invention relates to fail journal bearing. Aforesaid bearing comprises upper foil liner (1) meeting the requirements of equation t≥0.1·D0.33, where t is the foil liner thickness (mm), D is the shaft journal diametre (mm), key (2) welded to cut out part of upper foil liner, inner waved foil liner (3) arranged outside of aforesaid liner (1). Note here that wider and higher flutes, arranged in turn, and narrower and lower flutes form inner flutes. It includes also waved-foil liner (4) arranged outside of inner liner (3). Note here that inner flutes feature smaller height than that of aforesaid narrower and lower flute of liner (3). The bearing comprises also anti-impact sheet (5) to clamp inner outer flutes and bearing housing (6) arranged outside of aforesaid anti-impact sheet and furnished key (7).

EFFECT: higher bearing capacity, stability and efficiency.

2 cl, 4 dwg

The invention relates to a supporting bearings and in particular to means of preventing distortions for hydrodynamic air bearing

FIELD: mechanics.

SUBSTANCE: proposed invention relates to fail journal bearing. Aforesaid bearing comprises upper foil liner (1) meeting the requirements of equation t≥0.1·D0.33, where t is the foil liner thickness (mm), D is the shaft journal diametre (mm), key (2) welded to cut out part of upper foil liner, inner waved foil liner (3) arranged outside of aforesaid liner (1). Note here that wider and higher flutes, arranged in turn, and narrower and lower flutes form inner flutes. It includes also waved-foil liner (4) arranged outside of inner liner (3). Note here that inner flutes feature smaller height than that of aforesaid narrower and lower flute of liner (3). The bearing comprises also anti-impact sheet (5) to clamp inner outer flutes and bearing housing (6) arranged outside of aforesaid anti-impact sheet and furnished key (7).

EFFECT: higher bearing capacity, stability and efficiency.

2 cl, 4 dwg

Bow spring // 2364772

FIELD: mechanical engineering.

SUBSTANCE: invention refers to resilient elements of blade gasodynamic bearings used in small-sized high-speed turbomachines. The spring cut out from one plate contains multiple elementary arc-shaped springs (2) and (3). Springs (2) and (3) are located alternatively. Short springs (2) have equal length between reference edges. Long springs (3) also have equal length. The elementary springs (2) and (3) are interconnected by narrow bonding strips (8). Variable dependence of bow spring total tension on load is achieved due to difference in lengths for springs (2) and (3). Variable tension of bow spring in direction of elementary springs location is achieved due to variable width for springs (2) and/or variable width for springs (3).

EFFECT: reduction of shaft and bearing friction surfaces deterioration at start and stop of turbine rotor, reduction of rotor radial shift in bearing under action of heavy load and providing high limit carrying capacity of bearing at high rotor speed, providing assignment of various maximum inflection values to elementary springs and providing ease of bow spring manufacturing.

7 cl, 12 dwg

FIELD: machine building.

SUBSTANCE: conic leaf-type friction bearing consists of bush enveloping journal of shaft. On internal surface of the bush there are made slots wherein there are inserted leafs. The leaves are protected from falling out with end covers screwed to a case of the bearing. In the middle of the bearing there is an amount of radial orifices multiple to the amount of leaves for supply of gas under pressure and for facilitation of additional gas-static pressure in a working area.

EFFECT: conic leaf-type friction bearing increases reliability and service life of bearing unit, endurance, stability of motion and suppression of shafts and rotors runout owing to additional gas-static pressure in working area.

7 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

FIELD: wood working industry.

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

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

2 cl, 6 dwg, 1 tbl

FIELD: machine building.

SUBSTANCE: invention on the whole is related to a bearing, in particular, to the installation of a spherical bearing in a bearing assembly to be used in aerospace engineering. A bearing assembly (100) and method to form the bearing assembly comprising a casing (110) with a hole (132) are proposed. The hole has concave inner surface (134) on the whole. The bearing assembly includes a bearing (140) with an internal element (142). The internal element is movable around the central axis (A) and its dimensions allows for its location in the hole. The internal element has convex outer surface (144) on the whole which is mating the concave inner surface (134) of the hole. The casing acts as an external element of the bearing.

EFFECT: reduced potential risk of fretting wear and corrosion, decreased weight and complexity of bearing design and decreased dimensions of the casing, as well as improved accuracy of bearing positioning and reduced risk of its displacement.

22 cl, 6 dwg

FIELD: machine building.

SUBSTANCE: flap gasodynamic bearing with active control contains the housing (1) which has 16-24 inserted piezoactuators (3) located evenly along the circle of the housing (1) which support the circular corrugated element (10) which, in turn, supports the thin flap (11), enclosing the shaft (12), and also allowing to scan the data on the shaft position and bearing surface deformations and to vary rigidity of bearing surface.

EFFECT: improvement of reliability and durability of bearing assembly, increase of service life, stability of movement and suppression of beats of shafts and rotors at the expense of piezoactuator by means of which it is possible to control rigidity of bearing surface.

2 cl, 4 dwg

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