Rolling bearing

Abstract

The invention discloses a rolling bearing, which is used for improving the condition of unstable operation caused by axial play abrasion of the rolling bearing. The rolling bearing comprises an inner ring, an outer ring, a retainer, a rolling body and an anti-movement assembly, the retainer has an axial stable state and an axial movement state, and the anti-movement assembly comprises a resisting piece, an oil duct, a first valve piece and a first driving mechanism; the resisting piece comprises a resisting wall provided with an oil storage groove, in the axial stable state, an axial gap is formed between the resisting wall and the shaft end wall of the retainer, in the axial moving state, the shaft end wall of the retainer collides and abrades the resisting wall, and the resisting piece is fixed to the outer ring; the oil channel comprises an outlet which is located in the shaft end wall of the retainer. The first valve separates the outlet from the oil storage tank at the first position and communicates the outlet with the oil storage tank at the second position; the first driving mechanism comprises a first shape memory alloy component, drives the first valve piece to a first position in an axial stable state and drives the first valve piece to a second position in an axial moving state.

Description

Technical Field

[0001] The invention relates to a rolling bearing. Background Art

[0002] With the improvement of aircraft engine performance and reliability requirements, the design requirements of key aircraft engine components are becoming more and more stringent. As a key component of aircraft engines, the reliability and working stability of bearings are directly related to the normal operation and reliability of aircraft engines. Therefore, how to reasonably and scientifically design bearings has attracted extensive attention from many engine and bearing engineers.

[0003] When the engine is running, under certain working conditions, the rolling bearing will move axially under the drive of the rotating shaft. The outer ring of the bearing is designed with a flange to rub against the rolling element that moves axially to prevent axial movement. However, on the one hand, the end face of the rolling element directly rubs against the flange, and on the other hand, the rubbing surface lacks lubrication and cooling, resulting in severe wear of the rolling element and unstable operation of the rolling bearing. Summary of the invention

[0004] The object of the present invention is to provide a rolling bearing, which is used to improve the unstable operation caused by axial movement and wear of the rolling bearing.

[0005] According to an embodiment of the present invention, a rolling bearing includes an inner ring, an outer ring, a retaining frame, a rolling element and an anti-movement assembly, wherein the retaining frame has an axially stable state and an axially moving state, and the anti-movement assembly includes a resisting member, an oil passage, a first valve member and a first driving mechanism; the resisting member includes a resisting wall on which an oil storage tank is provided, wherein in the axially stable state, the resisting wall and the axial end wall of the retaining frame have an axial gap, and in the axially moving state, the axial end wall of the retaining frame rubs against the resisting wall, and the resisting member is fixed to the outer ring; the oil passage includes an outlet, and the outlet is located on the axial end wall of the retaining frame; the first valve member has a first position and a second position, wherein in the first position, the first valve member separates the outlet from the oil storage tank, and in the second position, the first valve member connects the outlet with the oil storage tank; the first driving mechanism includes a first shape memory alloy component, which drives the first valve member to the first position in the axially stable state, and drives the first valve member to the second position in the axially moving state.

[0006] In one or more embodiments, the first shape memory alloy component includes a first shape memory alloy rod, the first shape memory alloy rod is connected to the first valve component at the rod end, the first shape memory alloy rod has a first rod length in the axial stable state, the first shape memory alloy rod has a second rod length in the axial movement state, and the first rod length is greater than the second rod length.

[0007] In one or more embodiments, the first driving mechanism and the first valve member are located at the blocking member, and in the first position, the first valve member blocks the outlet, and in the second position, the first valve member opens the outlet.

[0008] In one or more embodiments, the first shape memory alloy rod extends axially, and the first valve member is located on the inner circumference of the oil storage tank. In the first position, the axial end wall of the first valve member is axially flush with the abutment wall, and in the second position, the axial end wall of the first valve member is axially flush with the axial end wall of the oil storage tank.

[0009] In one or more embodiments, the retaining member is fixed to the outer ring by the mounting member, and the mounting member protrudes axially outward from the axial end wall of the outer ring and has an axial spacing from the axial end wall of the outer ring.

[0010] In one or more embodiments, the retaining member is fixed to the outer ring by the mounting member; the mounting member includes a fixing groove, the fixing groove includes an axial end wall and an arcuate side wall connected to each other, the arcuate side wall of the fixing groove protrudes from the axial end wall of the outer ring, and the axial end wall of the fixing groove is spaced apart from the axial end wall of the outer ring; the mounting member also includes a fixing block connected to the retaining member, the two axial end walls of the fixing block respectively fit the axial end wall of the fixing groove and the axial end wall of the outer ring, and the arcuate side wall of the fixing block fits the arcuate side wall of the fixing groove.

[0011] In one or more embodiments, the oil passage includes a retainer oil passage, and the retainer oil passage includes a first section and a second section; the first section extends from the entrance of the inner peripheral wall of the retainer to the outer peripheral side and is connected to the second section; the second section extends to the axial end wall of the retainer, and the outer peripheral side wall of the second section is inclined toward the outer peripheral side as it extends, and the second section provides an outlet for the oil passage.

[0012] In one or more embodiments, the oil passage includes an inner ring oil passage, which extends from an entrance of the inner circumferential wall of the inner ring to an exit of the outer circumferential wall of the inner ring; a second valve component is provided at the exit of the inner ring oil passage, and the second valve component has a third position and a fourth position. In the third position, the second valve component blocks the exit of the inner ring oil passage, and in the fourth position, the second valve component opens the exit of the inner ring oil passage; the second valve component is configured with a second driving mechanism, and the second driving mechanism includes a second shape memory alloy component, which drives the second valve component to the third position when the rolling bearing is in a stopped state, and drives the second valve component to the fourth position when the rolling bearing is in a running state.

[0013] In one or more embodiments, the second shape memory alloy component extends in a length direction, the second shape memory alloy component is connected to the second valve component at one end in the length direction, the second shape memory alloy component has a first length when the rolling bearing is in a stopped state, and the second shape memory alloy component has a second length when the rolling bearing is in a running state, and the first length is greater than the second length.

[0014] In one or more embodiments, the second valve component and the second shape memory alloy component are an integral component.

[0015] The embodiments of the present invention have at least the following beneficial effects:

[0016] 1. The retaining wall blocks the shaft end wall of the cage, inhibits the axial movement of the cage, and then inhibits the axial movement of the rolling bearing, reduces the wear of the rolling elements, reduces failures, and increases the service life of the rolling bearing.

[0017] 2. When the temperature of the retainer and the retaining member changes from the higher temperature of the axially moving state to the lower temperature of the axially stable state, the first shape memory alloy component deforms and drives the first valve member to the first position, blocking the outlet of the oil channel and the oil storage tank, saving lubricating oil. When the temperature of the retainer and the retaining member changes from the lower temperature of the axially stable state to the higher temperature of the axially moving state, the first shape memory alloy component deforms and drives the first valve member to the second position, and the lubricating oil flowing out of the outlet of the oil channel flows into the oil storage tank, lubricating the shaft end wall and the retaining wall of the retainer that rub against each other, reducing wear and failure, and extending the service life of the rolling bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0019] Figure 1 It is a cross-sectional view of the rolling bearing, rotating shaft and oil collecting ring;

[0020] Figure 2 for Figure 1 half of;

[0021] Figure 3 for Figure 2 A partial view of

[0022] Figure 4 for Figure 3 A partial view of

[0023] Figure 5 for Figure 2 A partial view of

[0024] Figure 6 This is a front view of the anti-movement component;

[0025] Figure 7 It is a front view of the stopper.

[0026] Reference numerals:

[0027] 1-Inner circle;

[0028] 2-Outer ring;

[0029] 3-cage;

[0030] 4- rolling element;

[0031] 5- Anti-movement components;

[0032] 6- rotating shaft;

[0033] 7-Oil collecting ring;

[0034] 8-stopper;

[0035] 9-Resistance wall;

[0036] 10-Oil storage tank;

[0037] 11-Oil channel;

[0038] 12- outlet of the oil channel;

[0039] 13-first valve member;

[0040] 14- first driving mechanism;

[0041] 15-a first shape memory alloy component;

[0042] 16-a first shape memory alloy rod;

[0043] 17-Mounting slot;

[0044] 18-Mounting parts;

[0045] 19-fixing slot;

[0046] 20-shaft end wall of the fixing groove;

[0047] 21-arc-shaped side wall of the fixing groove;

[0048] 22-fixed block;

[0049] 23-bolt;

[0050] 24-diagonal stroke;

[0051] 25-ring;

[0052] 26-right angle rod;

[0053] 27-cage oil passage;

[0054] 28-The first section of the cage oil passage;

[0055] 29-Second section of the cage oil passage;

[0056] 30-inner ring oil channel;

[0057] 31- second valve member;

[0058] 32- second driving mechanism;

[0059] 33- a second shape memory alloy component;

[0060] 34- annular oil groove;

[0061] 35- tensioning ring. DETAILED DESCRIPTION

[0062] Reference will now be made in detail to embodiments of the present invention, one or more examples of which are illustrated in the accompanying drawings. Each example is provided to explain the present invention, not to limit the present invention. In fact, it will be apparent to those skilled in the art that various modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature illustrated or described as part of one embodiment may be used together with another embodiment to produce yet another embodiment. Therefore, the present invention is intended to cover these modifications and variations within the scope of the appended claims and their equivalents.

[0063] It should be noted that these and other subsequent drawings are only examples and are not drawn to scale, and should not be used to limit the actual scope of protection required by the present invention.

[0064] The terms "first", "second", etc. may be used interchangeably to distinguish one feature from another, and are not intended to mean that each feature must be located as shown in the figures in each embodiment.

[0065] like Figure 1 and Figure 2As shown, the rolling bearing includes an inner ring 1, an outer ring 2, a cage 3, rolling elements 4 and an anti-movement assembly 5. The inner ring 1 is sleeved on the rotating shaft 6 and fixed. The rolling element 4 is located in the groove of the inner ring 1 and in the pocket of the cage 3. The rolling element 4 can be a cylindrical rolling element. The inner ring 1 can be provided with an oil collecting ring 7 on one side of the axial direction, and the oil collecting ring 7 is sleeved on the rotating shaft 6 and fixed. The cage 3 has an axially stable state and an axially moving state. When the rotating shaft 6 moves axially, the rotating shaft 6 drives the inner ring 1 to move axially, the inner ring 1 drives the rolling element 4 to move axially, the rolling element 4 drives the cage 3 to move axially, and the cage 3 is in an axially moving state. When the rotating shaft 6 has no axial movement, the inner ring 1 is basically stationary in the axial direction and the axial position is stable, the rolling element 4 is basically stationary in the axial direction and the axial position is stable, the cage 3 is basically stationary in the axial direction and the axial position is stable, and the cage 3 is in an axially stable state.

[0066] like Figure 3 and Figure 4 , Figure 6 and Figure 7 As shown, the anti-movement assembly 5 includes a stopper 8. The stopper 8 has a stopper wall 9, and the stopper wall 9 faces the axial end wall of the retainer 3. The stopper wall 9 can be a straight wall, which is used to stop the straight axial end wall of the retainer 3. The retainer 3 is in an axially stable state, and there is an axial gap between the stopper wall 9 and the axial end wall of the retainer 3. The retainer 3 is in an axially moving state, and the axial end wall of the retainer 3 rubs against the stopper wall 9. The stopper wall 9 blocks the axial end wall of the retainer 3, suppressing the axial movement of the retainer 3, and then suppressing the axial movement of the rolling bearing, reducing the wear of the rolling body 4, reducing failures, and improving the service life of the rolling bearing.

[0067] like Figure 3 As shown, the stopper 8 is fixed to the outer ring 2 so as to withstand the axial impact of the retaining frame 3, and the relevant content will be described later.

[0068] like Figure 4 and Figure 7 As shown, the retaining wall 9 is provided with an oil storage groove 10. The oil storage groove 10 is a shallow groove formed by the retaining wall 9 and faces the shaft end wall of the retaining frame 3.

[0069] like Figure 4 As shown, the anti-slip assembly 5 further includes an oil passage 11 for supplying lubricating oil to the oil storage tank 10. An outlet 12 of the oil passage 11 is located at the shaft end wall of the retainer 3, and the lubricating oil in the oil passage 11 flows to the oil storage tank 10 through the outlet 12.

[0070] like Figure 4As shown, the anti-drifting assembly 5 further includes a first valve member 13, which is used to control the on-off flow of lubricating oil from the outlet 12 of the oil passage 11 to the oil storage tank 10. The first valve member 13 has a first position and a second position. In the first position, the first valve member 13 isolates the outlet 12 of the oil passage 11 from the oil storage tank 10, and the lubricating oil flowing out through the outlet 12 of the oil passage 11 does not flow into the oil storage tank 10. In the second position, the first valve member 13 connects the outlet 12 of the oil passage 11 with the oil storage tank 10, and the lubricating oil flowing out through the outlet 12 of the oil passage 11 flows into the oil storage tank 10.

[0071] like Figure 4 As shown, the first valve member 13 is provided with a first driving mechanism 14. The first driving mechanism 14 includes a first shape memory alloy component 15, which drives the first valve member 13 to the first position in the axial stable state, and drives the first valve member 13 to the second position in the axial moving state. In the axial stable state, the retainer 3 does not rub against the stopper 8, and does not generate heat by friction, so that the temperature of the retainer 3 and the stopper 8 is relatively low. In the axial moving state, the retainer 3 rubs against the stopper 8, generates heat by friction, and the temperature of the retainer 3 and the stopper 8 is relatively high. The first shape memory alloy component 15 has a shape memory effect, and the temperature change causes the first shape memory alloy component 15 to deform. When the temperature of the retainer 3 and the stopper 8 changes from the higher temperature in the axial moving state to the lower temperature in the axial stable state, the first shape memory alloy component 15 deforms and drives the first valve member 13 to the first position, blocking the outlet 12 of the oil passage 11 and the oil storage tank 10, saving lubricating oil, and the oil storage tank 10 can also store lubricating oil for the next lubrication. When the temperature of the retaining frame 3 and the stopper 8 changes from a lower temperature in an axially stable state to a higher temperature in an axially moving state, the first shape memory alloy component 15 deforms and drives the first valve component 13 to the second position, and the lubricating oil flowing out through the outlet 12 of the oil passage 11 flows into the oil storage tank 10 to lubricate the axial end wall and the stopper wall 9 of the retaining frame 3 that rub against each other, and when rubbing, the axial end wall and the stopper wall 9 of the retaining frame 3 continuously switch between axial clearance and close contact, and the lubricating oil in the oil storage tank 10 is squeezed to flow to the outside, taking away heat, cooling the retaining frame 3 and the stopper 8, reducing wear, reducing failures, and increasing the service life of the rolling bearing.

[0072] like Figure 4As shown, the first shape memory alloy component 15 may be a first shape memory alloy rod 16. The first shape memory alloy rod 16 is connected to the first valve member 13 at the rod end, and the first shape memory alloy rod 16 and the first valve member 13 may be welded. The first shape memory alloy rod 16 contracts along the rod length direction when the temperature rises, and stretches along the rod length direction when the temperature drops, so that it has a longer first rod length in the axially stable state, so that the first valve member 13 is separated between the outlet 12 of the oil passage 11 and the oil storage tank 10 at the first position, and thus has a shorter second rod length in the axially moving state, so that the first valve member 13 withdraws from the outlet 12 of the oil passage 11 and the oil storage tank 10 at the second position, releases the separation, and thus connects the outlet 12 of the oil passage 11 with the oil storage tank 10. The first rod length is greater than the second rod length. The first shape memory alloy rod 16 may be made of nickel-titanium alloy.

[0073] like Figure 4 As shown, the first driving mechanism 14 and the first valve member 13 can be arranged on the stopper 8, and the temperature of the stopper 8 increases or decreases, causing the first shape memory alloy rod 16 to contract or expand. In the axially stable state, the temperature of the stopper 8 is relatively low, the first shape memory alloy rod 16 has a relatively long first rod length, and the first valve member 13 blocks the outlet 12 of the oil passage 11 in the first position, thereby separating the outlet 12 of the oil passage 11 from the oil storage tank 10. In the axially moving state, the temperature of the stopper 8 is relatively high, the first shape memory alloy rod 16 has a relatively short second rod length, the first valve member 13 retracts and releases the obstruction to the outlet 12 of the oil passage 11, and the first valve member 13 opens the outlet 12 of the oil passage 11 in the second position, thereby connecting the outlet 12 of the oil passage 11 with the oil storage tank 10.

[0074] like Figure 4 As shown, the first shape memory alloy rod 16 can extend in the axial direction. The first shape memory alloy rod 16 can be disposed in the mounting groove 17 of the retaining member 8 and fixed to the groove wall of the mounting groove 17 at one end, such as by welding the groove wall at this end. The first shape memory alloy rod 16 is connected to the first valve member 13 at the other end. Figure 7, the first valve member 13 can be arranged on the inner circumference of the oil storage tank 10, aligned with the outlet 12 of the oil passage 11 which is also located on the inner circumference of the oil storage tank 10, and the lubricating oil flowing out through the outlet 12 of the oil passage 11 can flow to the oil storage tank 10 under the action of centrifugal force. In the first position, the axial end wall of the first valve member 13 is axially flush with the abutment wall 9, blocking the outlet 12 of the oil passage 11, thereby separating the outlet 12 of the oil passage 11 from the oil storage tank 10. In the second position, the axial end wall of the first valve member 13 is axially flush with the axial end wall of the oil storage tank 10, opening the outlet 12 of the oil passage 11, thereby connecting the outlet 12 of the oil passage 11 to the oil storage tank 10, and the first valve member 13 moves from the first position to the second position to give up the space connected to the oil storage tank 10, which is also used for lubricating oil, further expanding the oil supply area of ​​the abutment wall 9. In the illustrated embodiment, the first valve member 13 may be disposed in the installation groove 17 . The first valve member 13 moves from the first position to the second position to vacate a portion of the space in the installation groove 17 and communicate with the oil storage tank 10 .

[0075] like Figure 6 and Figure 7 As shown, the retaining member 8 may be a fan-shaped baffle. The anti-movement assembly 5 may be provided with four retaining members 8 in the circumferential direction, and the four retaining members 8 are evenly distributed in the circumferential direction, and every two retaining members 8 are spaced 90° in the circumferential direction. Figure 3 The retaining member 8 may be located at the center of the radial height of the retaining frame 3 , and the radial height of the retaining member 8 may be one third of the radial height of the retaining frame 3 .

[0076] like Figure 3As shown, the retaining member 8 can be fixed to the outer ring 2 by the mounting member 18. The mounting member 18 may include a fixing groove 19. The fixing groove 19 includes an axial end wall 20 and an arcuate side wall 21 connected to each other. The arcuate side wall 21 of the fixing groove 19 protrudes from the axial end wall of the outer ring 2. The arcuate side wall 21 of the fixing groove 19 may protrude in the axial direction. The arcuate side wall 21 of the fixing groove 19 may be a partial elliptical profile. The axial end wall 20 of the fixing groove 19 is spaced apart from the axial end wall of the outer ring 2. The axial end wall 20 of the fixing groove 19 may be perpendicular to the axial direction and have a uniform axial spacing with the axial end wall of the outer ring 2 perpendicular to the axial direction. The fixing groove 19 may be welded to the outer ring 2. The mounting member 18 may also include a fixing block 22 connected to the retaining member 8. The fixed block 22 is located in the interval between the axial end wall 20 of the fixed groove 19 and the axial end wall of the outer ring 2. The two axial end walls of the fixed block 22 respectively fit the axial end wall 20 of the fixed groove 19 and the axial end wall of the outer ring 2, so that the fixed block 22 is positioned and limited in the axial direction, and the retaining member 8 is further positioned and limited in the axial direction. The two axial end walls of the fixed block 22 can be perpendicular to the axial direction. The arcuate side wall of the fixed block 22 fits the arcuate side wall 21 of the fixed groove 19, so that the fixed block 22 is positioned and limited in the radial direction, and the retaining member 8 is further positioned and limited in the radial direction. The arcuate side wall of the fixed block 22 can have an elliptical profile. The fixed block 22 and the fixed groove 19 can be fixed by bolts 23, and the bolts 23 can connect the arcuate side wall of the fixed block 22 and the arcuate side wall 21 of the fixed groove 19.

[0077] like Figure 3 As shown, the mounting member 18 can protrude axially outward from the axial end wall of the outer ring 2 and have an axial spacing from the axial end wall of the outer ring 2. Figure 6 The mounting member 18 may further include an inclined rod 24, a ring 25 and a right-angle rod 26. The inclined rod 24 obliquely protrudes axially outward from the fixing block 22 and is connected to the ring 25. The fixing groove 19, the fixing block 22 and the inclined rod 24 configured for each retaining member 8 are connected to the ring 25. The right-angle rod 26 includes an axially extending first rod segment and a radially extending second rod segment, the first rod segment and the second rod segment are connected to each other, the first rod segment is connected to the axial end wall of the retaining member 8, and the second rod segment is connected to the ring 25. The right-angle rod 26 configured for each retaining member 8 is connected to the ring 25. The first rod segments of the inclined rod 24 and the right-angle rod 26 protrude axially outward, so that the ring 25 has an axial spacing from the axial end wall of the outer ring 2 to avoid interference with other structures of the rolling bearing.

[0078] like Figure 4As shown, the oil passage 11 may include a cage oil passage 27. The cage oil passage 27 includes a first section 28 and a second section 29. The first section 28 extends from the entrance of the inner circumferential wall of the cage 3 to the outer circumferential side, and is connected to the second section 29, so that when the rolling bearing is running, under the action of centrifugal force, the lubricating oil flows to the outer circumferential side through the entrance of the cage oil passage 27 at the inner circumferential wall of the cage 3 and enters the second section 29. The first section 28 may extend radially. The second section 29 extends to the axial end wall of the cage 3, providing the outlet 12 of the oil passage 11. As the second section 29 extends from the first section 28 to the axial end wall of the cage 3, the wall surface of the outer circumferential side of the second section 29 is inclined to the outer circumferential side, so that when the rolling bearing is running, under the action of centrifugal force, the lubricating oil flows to the outlet 12 of the oil passage 11 along the inclined outer circumferential side wall in the second section 29. The second section 29 may extend axially.

[0079] like Figure 5 As shown, the oil passage 11 may also include an inner ring oil passage 30. The inner ring oil passage 30 extends from the inlet of the inner peripheral wall of the inner ring 1 to the outlet of the outer peripheral wall of the inner ring 1, so that when the rolling bearing is running, under the action of centrifugal force, the lubricating oil on the inner peripheral wall of the inner ring 1 flows to the outer peripheral side through the inlet of the inner ring oil passage 30 to the outlet of the inner ring oil passage 30. The outlet of the inner ring oil passage 30 is aligned with the inlet of the cage oil passage 27, so that when the rolling bearing is running, under the action of centrifugal force, the lubricating oil is thrown to the inlet of the cage oil passage 27 through the outlet of the inner ring oil passage 30. The inner ring oil passage 30 may extend radially.

[0080] like Figure 5 As shown, the inner ring oil passage 30 may be provided with a second valve member 31 at the outlet. An annular oil groove 34 may be provided on the outer peripheral wall of the inner ring 1, and each inner ring oil passage 30 configured with the retaining member 8 is connected to the annular oil groove 34. The second valve member 31 and the second drive mechanism 32 described later may be provided in the annular oil groove 34. The second valve member 31 has a third position and a fourth position. The second valve member 31 blocks the outlet of the inner ring oil passage 30 in the third position, and the lubricating oil in the inner ring oil passage 30 cannot be thrown out through the outlet of the inner ring oil passage 30. The second valve member 31 opens the outlet of the inner ring oil passage 30 in the fourth position, and the lubricating oil in the inner ring oil passage 30 is thrown out through the outlet of the inner ring oil passage 30 to the inlet of the retainer oil passage 27.

[0081] like Figure 5As shown, the second valve member 31 is provided with a second driving mechanism 32. The second driving mechanism 32 includes a second shape memory alloy component 33, which drives the second valve member 31 to the third position when the rolling bearing is stopped, and drives the second valve member 31 to the fourth position when the rolling bearing is running. When the rolling bearing is stopped, the rolling element 4 is stationary in the inner ring 1, and no friction heat is generated, so that the temperature of the inner ring 1 is relatively low. When the rolling bearing is running, the rolling element 4 rolls in the inner ring 1, and friction heat is generated, so that the temperature of the inner ring 1 is relatively high. The second shape memory alloy component 33 has a shape memory effect, and the temperature change causes the second shape memory alloy component 33 to deform. When the temperature of the inner ring 1 changes from the higher temperature of the rolling bearing running state to the lower temperature of the rolling bearing stopping state, the second shape memory alloy component 33 deforms and drives the second valve member 31 to the third position, blocking the outlet of the inner ring oil passage 30, saving lubricating oil. When the temperature of the inner ring 1 changes from a lower temperature in the rolling bearing stop state to a higher temperature in the rolling bearing operation state, the second shape memory alloy component 33 deforms and drives the second valve component 31 to the fourth position, and the lubricating oil in the inner ring oil passage 30 is thrown out through the outlet of the inner ring oil passage 30 to the inlet of the retaining frame oil passage 27, and the lubricating oil is supplied to the retaining frame oil passage 27 to cool and dissipate the heat of the retaining frame 3, and finally supplied from the retaining frame oil passage 27 to the axial end wall and the abutment wall 9 of the retaining frame 3 that rub against each other.

[0082] like Figure 5 As shown, the second shape memory alloy component 33 extends in the length direction. The second shape memory alloy component 33 may be a tensioning ring 35, which extends in the axial direction, and the length direction of the tensioning ring 35 is parallel to the axial direction. The second shape memory alloy component 33 is connected to the second valve component 31 at one end in the length direction. The tensioning ring 35 is connected to the second valve component 31 at one end in the axial direction. The second valve component 31 and the second shape memory alloy component 33 may be an integral component. The second valve component 31 may be provided by the tensioning ring 35, and the second valve component 31 is the axial end of the tensioning ring 35. The tensioning ring 35 may be welded to the wall of the annular oil groove 34 at the other axial end. The second shape memory alloy component 33 has a first length in the stopped state of the rolling bearing, and the second shape memory alloy component 33 has a second length in the running state of the rolling bearing, and the first length is greater than the second length. The tension ring 35 contracts in the length direction when the temperature rises, and stretches in the length direction when the temperature drops, so that it has a longer first length when the rolling bearing is stopped, so that the second valve member 31 blocks the outlet of the inner ring oil passage 30 in the third position, and thus has a shorter second length when the rolling bearing is running, so that the second valve member 31 opens the outlet of the inner ring oil passage 30 in the fourth position. The tension ring 35 can be made of nickel-titanium alloy.

[0083] Although the present invention is disclosed as above by the embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention.

Claims

1. A rolling bearing, characterized in that: It includes an inner ring, an outer ring, a cage, a rolling element and an anti-movement assembly, wherein the cage has an axially stable state and an axially movable state, and the anti-movement assembly includes: The retaining member comprises a retaining wall provided with an oil storage groove, wherein in the axially stable state, the retaining wall and the shaft end wall of the retaining frame have an axial gap, and in the axially moving state, the shaft end wall of the retaining frame rubs against the retaining wall, and the retaining member is fixed to the outer ring; an oil passage, comprising an outlet, the outlet being located at the shaft end wall of the retainer; a first valve member having a first position and a second position, wherein in the first position, the first valve member isolates the outlet from the oil storage tank, and in the second position, the first valve member connects the outlet to the oil storage tank; and The first driving mechanism includes a first shape memory alloy component, which drives the first valve component to the first position in the axial stable state, and drives the first valve component to the second position in the axial moving state.

2. The rolling bearing according to claim 1, characterized in that: The first shape memory alloy component includes a first shape memory alloy rod, which is connected to the first valve component at the rod end. The first shape memory alloy rod has a first rod length in the axial stable state and a second rod length in the axial movement state, and the first rod length is greater than the second rod length.

3. The rolling bearing according to claim 2, characterized in that: The first driving mechanism and the first valve member are located at the blocking member. In the first position, the first valve member blocks the outlet. In the second position, the first valve member opens the outlet.

4. The rolling bearing according to claim 3, characterized in that: The first shape memory alloy rod extends axially, and the first valve component is located on the inner circumference of the oil storage tank. In the first position, the axial end wall of the first valve component is axially flush with the abutment wall, and in the second position, the axial end wall of the first valve component is axially flush with the axial end wall of the oil storage tank.

5. The rolling bearing according to claim 1, characterized in that: The retaining member is fixed to the outer ring by the mounting member, and the mounting member protrudes axially outward from the axial end wall of the outer ring and has an axial spacing from the axial end wall of the outer ring.

6. The rolling bearing according to claim 1, characterized in that: The retaining member is fixed to the outer ring by the mounting member; The mounting member comprises a fixing groove, the fixing groove comprises an axial end wall and an arcuate side wall connected to each other, the arcuate side wall of the fixing groove protrudes from the axial end wall of the outer ring, and the axial end wall of the fixing groove is spaced from the axial end wall of the outer ring; The mounting member also includes a fixing block connected to the retaining member, wherein two axial end walls of the fixing block respectively fit the axial end walls of the fixing groove and the axial end walls of the outer ring, and the arcuate side wall of the fixing block fits the arcuate side wall of the fixing groove.

7. The rolling bearing according to claim 1, characterized in that: The oil passage comprises a retainer oil passage, and the retainer oil passage comprises a first section and a second section; The first section extends from the entrance of the inner peripheral wall of the retainer toward the outer peripheral side and communicates with the second section; The second section extends to the shaft end wall of the retainer, and the outer peripheral side wall of the second section is inclined toward the outer peripheral side as it extends, and the second section provides an outlet of the oil passage.

8. The rolling bearing according to claim 1, characterized in that: The oil passage comprises an inner ring oil passage, the inner ring oil passage extending from an inlet of an inner peripheral wall of the inner ring to an outlet of an outer peripheral wall of the inner ring; A second valve member is disposed at the outlet of the inner ring oil passage, and the second valve member has a third position and a fourth position. In the third position, the second valve member blocks the outlet of the inner ring oil passage, and in the fourth position, the second valve member opens the outlet of the inner ring oil passage. The second valve member is configured with a second driving mechanism, which includes a second shape memory alloy component, driving the second valve member to the third position when the rolling bearing is in a stopped state, and driving the second valve member to the fourth position when the rolling bearing is in a running state.

9. The rolling bearing according to claim 8, characterized in that: The second shape memory alloy component extends along the length direction, and the second shape memory alloy component is connected to the second valve component at one end of the length direction. The second shape memory alloy component has a first length when the rolling bearing is in a stopped state, and the second shape memory alloy component has a second length when the rolling bearing is in a running state, and the first length is greater than the second length.

10. The rolling bearing according to claim 9, characterized in that: The second valve component and the second shape memory alloy component are an integral component.

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