Flywheel automatic grease injection device

Abstract

This invention relates to the field of flywheel grease injection technology, specifically to an automatic flywheel grease injection device, comprising: two mounting seats, each with a through-hole circular groove on its sidewall; two connecting mechanisms, each mounted within one of the mounting seats; a rotating shaft, its two end sidewalls connected to the two connecting mechanisms, the rotating shaft sidewalls being fixedly connected to a flywheel; each connecting mechanism comprising: two fixed rings, their outer sidewalls fixedly connected to the inner wall of the circular groove; an outer ring, connected to the adjacent sidewalls of the two fixed rings via a limiting mechanism; an inner ring, its sidewall connected to the outer sidewall of the rotating shaft via a spline; and multiple balls, each embedded between the inner sidewall of the outer ring and the outer sidewall of the inner ring. In this invention, the spiral grooves on the two rotating rings push the grease towards the annular plate, trapping particles generated by the localized high-temperature carbonization of the grease due to high-speed rotation at the annular plate, preventing them from entering between the balls and the inner and outer rings, reducing the risk of wear, and extending the service life of the flywheel bearing assembly.

Description

Technical Field

[0001] This invention relates to the field of flywheel grease injection technology, and more specifically to an automatic flywheel grease injection device. Background Technology

[0002] As a key rotating component in energy storage and transmission systems, the flywheel is mounted on the shaft via a bearing structure and operates under high-speed conditions for extended periods. To ensure the smoothness and reliability of the flywheel's rotation, the balls in its supporting parts must be continuously and adequately lubricated.

[0003] Because the flywheel rotates at high speed during operation, the high-speed rotation and friction of the bearings generate a lot of heat, which makes the grease inside prone to high-temperature oxidation and carbonization, resulting in hard carbon residue and other impurities. Currently, the method for cleaning these impurities is to inject fresh grease into the bearing, and the pressure of the fresh grease will squeeze out the old grease and these impurities. However, relying on grease extrusion is difficult to clean the stubborn carbonized impurities attached to the bearing gaps and ball surfaces. These impurities remain and continue to aggravate component wear. At the same time, this method wastes a lot of grease, and each time impurities are removed, a large amount of fresh grease is consumed, resulting in high maintenance consumable costs.

[0004] To address this, we designed an automatic flywheel grease injection device. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an automatic flywheel grease injection device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An automatic flywheel grease injection device, comprising: Two mounting bases, each with a through-hole circular groove in its sidewall; Two connecting mechanisms are respectively installed in two mounting bases; A rotating shaft, the two end sidewalls of which are respectively connected to two connecting mechanisms, and a flywheel is fixedly connected to the sidewall of the rotating shaft; The connecting mechanism includes: The outer walls of the two fixing rings are fixedly connected to the inner wall of the circular groove; The outer ring is connected to the side walls of the two fixed rings that are close to each other by a limiting mechanism; The inner ring has its sidewalls connected to the outer sidewall of the shaft via splines. Multiple balls are embedded between the inner wall of the outer ring and the outer wall of the inner ring; An annular cavity, which is located within the outer ring; Multiple grease outlets are provided, all of which are opened through the inner wall of the annular cavity; The mounting base is equipped with a rotating mechanism that drives the outer ring to rotate; The mounting base is equipped with a grease injection mechanism for injecting grease into the annular cavity.

[0007] Preferably, the limiting mechanism includes two first annular grooves, which are respectively formed on the sidewalls of two fixed rings that are close to each other. The inner walls of the two first annular grooves are sealed and slidably connected with a self-rotating limiting ring, and the sidewalls of the two limiting rings that are close to each other are fixedly connected to the sidewall of the outer ring.

[0008] Preferably, the grease injection mechanism includes a grease injection tube fixedly connected to the upper part of the inner wall of one of the first annular grooves, a solenoid valve is installed inside the grease injection tube, and a plurality of grease inlet tubes connected to the inner wall of the annular cavity are fixedly connected to the side wall of the limiting ring near the grease injection tube.

[0009] Preferably, the rotating mechanism includes a motor fixedly connected to the side wall of the mounting base, a second annular groove is formed on the inner side wall of the outer ring of the circular groove, a toothed ring is fixedly connected to the outer side wall of the outer ring, the toothed ring is located in the second annular groove, an opening groove is formed at the top of the second annular groove, a gear is fixedly connected to the side wall of the motor located in the opening groove, and the gear and the toothed ring mesh with each other.

[0010] Preferably, the two fixed rings have limiting ring grooves on their mutually distant sidewalls, and the inner walls of the two limiting ring grooves are detachably and sealed with annular covers by multiple bolts. The inner sidewall of the annular cover is provided with a sealing ring, and the outer sidewall of the inner ring is interference-fitted with the inner sidewall of the sealing ring.

[0011] Preferably, a third annular groove is provided on the side wall of the annular cover away from the flywheel. An annular plate is fixedly connected to the inner wall of the third annular groove. Multiple filter holes are evenly distributed on the side wall of the annular plate. The multiple filter holes are divided into four arrangement areas along the side wall of the annular plate. A first pipe is fixedly connected to the bottom of the third annular groove. A second pipe is fixedly connected between the lower part of the first annular groove corresponding to the grease inlet pipe and the inner wall of the limiting annular groove.

[0012] Preferably, the first tube and the second tube are opposite each other, and the second tube is equipped with a one-way valve that allows grease to enter the first annular groove only from the first tube.

[0013] Preferably, the inner wall of the outer ring is fixedly connected to two rotating rings, the outer walls of the two rotating rings are respectively attached to the inner walls of the two corresponding fixed rings, and the inner walls of the two rotating rings are provided with spiral grooves, the spiral grooves located in the two mounting seats have opposite directions of rotation.

[0014] Preferably, the inner wall of the third annular groove is elastically connected to four iron plates by multiple springs. The four iron plates are located in four arrangement areas respectively. Multiple unblocking rods are fixedly connected to the side walls of the four iron plates away from the springs. The multiple unblocking rods correspond one-to-one with multiple filter holes. A permanent magnet block is fixedly connected to the inner side wall of the rotating ring near the annular plate.

[0015] The present invention has the following beneficial effects: 1. The spiral grooves on the two rotating rings push the grease toward the annular plate, trapping the tiny particles generated by the local high-temperature carbonization of the grease caused by high-speed rotation at the annular plate. These particles no longer enter between the balls and the inner and outer rings, reducing the risk of wear and extending the service life of the flywheel bearing assembly. This avoids the problem of using the squeezing force of fresh grease to squeeze out old grease and these impurities, which is difficult to clean stubborn carbonized impurities adhering to the bearing clearance and ball surface, and also results in high maintenance and consumable costs, as is the case in existing technologies. 2. At the same time, the filtered grease flows back to the first annular groove through the first and second pipes, forming a closed grease circulation loop. The grease can be continuously replenished between the bearing friction pairs without the need for frequent manual opening of the cap to add grease. Fresh grease only needs to be added after carbonized impurities have accumulated to a certain extent, reducing the frequency of grease injection and saving grease consumption. 3. The permanent magnet blocks periodically reciprocate to magnetically attract the iron plate, and together with the spring, the unblocking rod moves back and forth, which can clean up the accumulated impurities in the filter holes by itself, ensuring the flow of the filter holes and making the grease circulate smoothly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an automatic grease injection device for a flywheel proposed in this invention; Figure 2 This is a vertical cross-sectional view of an automatic grease injection device for a flywheel proposed in this invention. Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A; Figure 4 for Figure 2 Enlarged schematic diagram of the structure at point B; Figure 5 This is a schematic diagram of the structure of an automatic grease injection device for a flywheel proposed in this invention, in which one of the mounting seats is separated from the annular cover; Figure 6 for Figure 2 A front view structural diagram; Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point C; Figure 8 This is a schematic diagram of the structure of the iron plate and permanent magnet block in an automatic grease injection device for a flywheel proposed in this invention.

[0017] In the diagram: 1. Mounting base; 2. Fixing ring; 3. Outer ring; 4. Inner ring; 5. Ball bearing; 6. Rotating shaft; 7. Flywheel; 8. First annular groove; 9. Limiting ring; 10. Annular cavity; 11. Grease outlet; 12. Grease inlet pipe; 13. Grease injection pipe; 14. Second annular groove; 15. Opening groove; 16. Motor; 17. Gear; 18. Gear ring; 19. Limiting ring groove; 20. Annular cover; 21. Third annular groove; 22. Annular plate; 23. Filter hole; 24. Rotating ring; 25. Spiral groove; 26. First pipe; 27. Second pipe; 28. Spring; 29. ​​Iron plate; 30. Unclogging rod; 31. Permanent magnet. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Reference Figures 1-8 An automatic flywheel grease injection device, comprising: Two mounting bases 1, each with a through-hole circular groove on its side wall. To facilitate fixing, each mounting base 1 has a mounting ear plate at its bottom with threaded holes or U-shaped grooves to compensate for installation errors. It is fixed to an external foundation (such as the base plate of a flywheel energy storage cabinet) by high-strength bolts.

[0020] Two connecting mechanisms are respectively installed in two mounting bases 1; The rotating shaft 6 has two side walls connected to two connecting mechanisms respectively. A flywheel 7 is fixedly connected to the side wall of the rotating shaft 6. The rotating shaft 6 is driven by an external power source. A transmission chain can be installed on the rotating shaft 6 to achieve high-speed rotation of the rotating shaft 6 and the flywheel 7.

[0021] The connecting mechanism includes: The outer walls of the two fixed rings 2 are fixedly connected to the inner wall of the circular groove. The outer ring 3 is connected to the side walls of the two fixed rings 2 that are close to each other by a limiting mechanism; The inner ring 4 has its sidewall connected to the outer sidewall of the rotating shaft 6 via a spline. The spline connection can transmit torque and also allow the inner ring 4 to make slight axial floating on the rotating shaft 6 to automatically adapt to thermal expansion or installation deviation. Multiple balls 5 are embedded between the inner wall of the outer ring 3 and the outer wall of the inner ring 4 to form the rolling elements of the bearing. Furthermore, the inner wall of the outer ring 3 and the outer wall of the inner ring 4 are both machined with raceways to match the balls 5. An annular cavity 10 is formed within the outer ring 3; Multiple grease outlet holes 11 are provided, all of which are opened through the inner wall of the annular cavity 10. Furthermore, the grease outlet holes 11 are all located in the axial middle position of the inner raceway of the outer ring 3, ensuring that the grease can be directly sprayed onto the contact area between the ball 5 and the inner and outer rings. Each of the multiple grease outlet holes 11 is equipped with a one-way valve that allows grease to flow out only from the annular cavity 10.

[0022] The mounting base 1 is equipped with a rotating mechanism that drives the outer ring 3 to rotate; The mounting base 1 is equipped with a grease injection mechanism for injecting grease into the annular cavity 10.

[0023] The limiting mechanism includes two first annular grooves 8, which are respectively opened on the side walls of two fixed rings 2 that are close to each other. The inner walls of the two first annular grooves 8 are sealed and slidably connected with a self-rotating limiting ring 9. The side walls of the two limiting rings 9 that are close to each other are fixedly connected to the side wall of the outer ring 3.

[0024] Furthermore, a PTFE slip ring seal is provided between the outer wall of the limiting ring 9 and the inner wall of the first annular groove 8 to ensure that the grease will not leak from here.

[0025] The grease injection mechanism includes a grease injection pipe 13 fixedly connected to the upper part of the inner wall of one of the first annular grooves 8. A solenoid valve is installed inside the grease injection pipe 13. Multiple grease inlet pipes 12, which are connected to the inner wall of the annular cavity 10, are fixedly connected to the side wall of the limiting ring 9 near the grease injection pipe 13. The grease injection pipe 13 is connected to an external grease injection pump. When grease is injected, the solenoid valve is opened, and the external grease injection pump injects fresh grease into the annular cavity 10 at a certain pressure through the grease injection pipe 13, the first annular groove 8 and the grease inlet pipes 12 in sequence. The grease then seeps out evenly through multiple grease outlet holes 11 to lubricate the ball bearings 5.

[0026] The rotating mechanism includes a motor 16 fixedly connected to the side wall of the mounting base 1. A second annular groove 14 is formed on the inner side wall of the outer ring 3. A toothed ring 18 is fixedly connected to the outer side wall of the outer ring 3. The toothed ring 18 is located in the second annular groove 14. An opening groove 15 is formed at the top of the second annular groove 14. A gear 17 is fixedly connected to the side wall of the motor 16 located in the opening groove 15. The gear 17 and the toothed ring 18 mesh with each other.

[0027] Start the motor 16, which drives the outer ring 3 and the rotating ring 24 and the limiting ring 9 fixed thereto to rotate together through the gear 17 and the gear ring 18. It should be noted that the outer ring 3 rotates at a slower speed, so that the grease in the annular cavity 10 will not be unable to flow out through the multiple grease outlet holes 11 under the action of centrifugal force.

[0028] Both fixed rings 2 have limiting ring grooves 19 on their sidewalls that are far apart from each other. The inner walls of the two limiting ring grooves 19 are detachably and sealed with annular covers 20 by multiple bolts. The inner wall of the annular cover 20 is provided with a sealing ring. The outer wall of the inner ring 4 is interference-fitted with the inner wall of the sealing ring to form a rotary dynamic seal, thereby forming a sealing cavity at both ends of the bearing assembly to prevent grease leakage.

[0029] A third annular groove 21 is provided on the side wall of the annular cover 20 away from the flywheel 7. An annular plate 22 is fixedly connected to the inner wall of the third annular groove 21. A plurality of filter holes 23 are evenly distributed on the side wall of the annular plate 22. Furthermore, the diameter of the filter holes 23 is determined according to the consistency of the grease and the typical size of the carbonized particles, for example, 0.1mm-0.5mm.

[0030] Multiple filter holes 23 are divided into four arrangement areas along the side wall of the annular plate 22 to facilitate subsequent unblocking. The bottom of the third annular groove 21 is fixedly connected to the first pipe 26. The bottom of the first annular groove 8 corresponding to the grease inlet pipe 12 is fixedly connected to the inner wall of the limiting annular groove 19, thus forming a closed grease circulation loop. The grease can be continuously replenished between the bearing friction pairs without the need for frequent manual opening of the cap to add grease. Fresh grease only needs to be added after carbonized impurities have accumulated to a certain extent, reducing the frequency of grease injection and saving grease consumption.

[0031] It should be noted that, in order to improve the quality of grease injection, a vent plug is installed at the highest point of the annular cover 20 (not shown in the figure). When injecting grease for the first time or restarting after a long period of shutdown, loosen the vent plug until grease flows out continuously from the plug hole (without air bubbles), and then tighten the plug.

[0032] Furthermore, the four regions are divided into four equal parts at 90° circumference along the annular plate 22, and the filter holes 23 in each region are arranged in a rectangular or concentric circle pattern.

[0033] The first tube 26 and the second tube 27 are aligned. The second tube 27 is equipped with a one-way valve that allows grease to enter the first annular groove 8 from the first tube 26. This allows for the recycling of grease, so that fresh grease only needs to be replenished when carbonized impurities accumulate to a certain extent or after long-term operation, thus reducing the frequency of grease injection.

[0034] Two rotating rings 24 are fixedly connected to the inner wall of the outer ring 3. The outer walls of the two rotating rings 24 are respectively attached to the inner walls of the two corresponding fixed rings 2. The inner walls of the two rotating rings 24 are provided with spiral grooves 25.

[0035] Furthermore, the spiral grooves 25 on the two rotating rings 24 rotate in the same direction, both designed to push the grease toward the annular plate 22 away from the flywheel 7. This allows the tiny particles generated by the local high-temperature carbonization of the grease due to high-speed rotation to be trapped on the side wall of the annular plate 22 and at the filter holes 23 during circulation, preventing them from entering between the balls 5 and the inner and outer rings. This reduces the risk of wear, extends the service life of the flywheel bearing assembly, and avoids the problem of squeezing out old grease and these impurities by the pressure of fresh grease in the prior art, which makes it difficult to clean stubborn carbonized impurities attached to the bearing clearance and ball surface, and also results in high maintenance costs.

[0036] Furthermore, the outer wall of the rotating ring 24 fits against the inner wall of the fixed ring 2 to form a rotating sealing surface. The pumping gap exists only between the rotating ring 24 and the inner ring 4, ensuring that the axial thrust generated by the spiral groove 25 is entirely applied to the grease.

[0037] The inner wall of the third annular groove 21 is elastically connected to four iron plates 29 by multiple springs 28. The four iron plates 29 are located in four different areas. Multiple unclogging rods 30 are fixedly connected to the sidewalls of the four iron plates 29 away from the springs 28. Each unclogging rod 30 corresponds to a filter hole 23. A permanent magnet block 31 is fixedly connected to the inner wall of the rotating ring 24 near the annular plate 22. The permanent magnet block 31 is made of neodymium iron boron. The permanent magnet block 31 periodically reciprocates to magnetically attract the iron plates 29. In conjunction with the springs 28, the unclogging rods 30 reciprocate, which can clean up the accumulated impurities in the filter holes 23 on their own, ensuring the flowability of the filter holes 23 and making the grease circulate smoothly.

[0038] Furthermore, the diameter of the unblocking rod 30 is slightly smaller than the diameter of the filter hole 23, and its front end can be processed into a hemispherical or conical shape to facilitate insertion and removal of impurities.

[0039] In this invention, the rotating shaft 6 and flywheel 7 rotate at high speed under the action of an external power source, driving the two inner rings 4 to rotate at high speed. At this time, the grease on the inner ring 4 and multiple balls 5 will be thrown from the inner ring 4 raceway and the surface of the balls 5 to the inner wall of the outer ring 3 under the action of centrifugal force. Under the continuous ejection and extrusion of the grease, it will diffuse axially to the left and right sides along the inner wall of the outer ring 3 and enter the starting end of the spiral groove 25 on the left and right rotating rings 24. The drive motor 16 rotates, which drives the outer ring 3 to rotate through the gear 17 and the gear ring 18, and drives the two rotating rings 24 to rotate. Under the action of the spiral grooves 25 in the two rotating rings 24, the grease can generate a lateral thrust. Since the spiral grooves 25 on the two rotating rings 24 rotate in the same direction, they are both set to push the grease towards the annular plate 22 on the side away from the flywheel 7. At this time, the grease can be directionally pushed to the annular plate 22. Then the grease enters the third annular groove 21 through the filter hole 23, and then flows back to the first annular groove 8 through the first pipe 26 and the second pipe 27. Finally, it returns to the annular cavity 10 through multiple grease inlet pipes 12, and then flows out through multiple grease injection holes 11, thus forming a closed filtration cycle. This ensures that there is always grease between the outer ring 3, the ball 5 and the inner ring 4, which ensures its lubrication effect. At the same time, fresh grease only needs to be replenished after long-term operation when it becomes thickened due to oxidation or has too many impurities. At this time, impurities generated by the carbonization of lubricating grease due to high-speed rotation will be trapped on the side wall of the annular plate 22. Simultaneously, the rotating ring 24 near the annular plate 22 rotates, causing the permanent magnet block 31 on its inner wall to periodically pass over the iron plate 29. When the permanent magnet block 31 rotates to be close to a certain iron plate 29, the magnetic force overcomes the resistance of the spring 28 and attracts the iron plate 29, causing the unblocking rod 30 to be inserted into the corresponding area filter hole 23. After passing the area, the magnetic force decreases, the spring 28 returns to its original position, and the unblocking rod 30 is withdrawn. In this way, the four areas are periodically cleaned in sequence during the rotation process, realizing the self-unblocking of the filter hole 23 without affecting the filtration of grease by multiple filter holes 23, keeping the filter holes unobstructed. When maintenance is needed in the future, simply remove the annular cover 20 and clean the impurities adhering to the side wall of the annular plate 22. When grease injection is required, the operator opens the solenoid valve installed in the grease injection tube 13 and injects fresh grease from the grease injection tube 13 into the first annular groove 8. Then, it enters the annular cavity 10 through multiple grease inlet tubes 12 on one of the limiting rings 9. Subsequently, the grease seeps out evenly from multiple grease outlet holes 11 and enters the channel between the outer ring 3 and the ball 5 to lubricate the ball 5.

[0040] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A flywheel automatic grease injection device, characterized by, include: Two mounting bases (1), each of which has a circular groove through its sidewall; Two connecting mechanisms are respectively installed in two mounting bases (1); The rotating shaft (6) has two side walls connected to two connecting mechanisms respectively, and a flywheel (7) is fixedly connected to the side wall of the rotating shaft (6). The connecting mechanism includes: The two fixing rings (2) have their outer walls fixedly connected to the inner wall of the circular groove; The outer ring (3) is connected to the side walls of the two fixed rings (2) that are close to each other by a limiting mechanism; The inner ring (4) has its sidewall connected to the outer sidewall of the rotating shaft (6) via a spline; Multiple balls (5) are embedded between the inner wall of the outer ring (3) and the outer wall of the inner ring (4); An annular cavity (10) is formed inside the outer ring (3); Multiple grease outlets (11) are provided, all of which are opened through the inner wall of the annular cavity (10); The mounting base (1) is provided with a rotating mechanism that drives the outer ring (3) to rotate; The mounting base (1) is provided with a grease injection mechanism for injecting grease into the annular cavity (10).

2. The automatic grease injection device for a flywheel as set forth in claim 1, wherein The limiting mechanism includes two first annular grooves (8), which are respectively opened on the side walls of the two fixed rings (2) that are close to each other. The inner walls of the two first annular grooves (8) are sealed and slidably connected with a self-rotating limiting ring (9). The side walls of the two limiting rings (9) that are close to each other are fixedly connected to the side wall of the outer ring (3).

3. The automatic flywheel grease injection device according to claim 2, characterized in that, The grease injection mechanism includes a grease injection tube (13) fixedly connected to the upper part of the inner wall of one of the first annular grooves (8). A solenoid valve is installed inside the grease injection tube (13). A plurality of grease inlet tubes (12) connected to the inner wall of the annular cavity (10) are fixedly connected to the side wall of the limiting ring (9) near the grease injection tube (13).

4. The automatic flywheel grease injection device according to claim 1, characterized in that, The rotating mechanism includes a motor (16) fixedly connected to the side wall of the mounting base (1). The inner side wall of the outer ring (3) is provided with a second annular groove (14). A toothed ring (18) is fixedly connected to the outer side wall of the outer ring (3). The toothed ring (18) is located in the second annular groove (14). An opening groove (15) is provided at the top of the second annular groove (14). A gear (17) is fixedly connected to the side wall of the motor (16) located in the opening groove (15). The gear (17) and the toothed ring (18) mesh with each other.

5. The automatic flywheel grease injection device according to claim 3, characterized in that, The two fixed rings (2) have limiting ring grooves (19) on their sidewalls that are far apart from each other. The inner walls of the two limiting ring grooves (19) are detachably and sealed with an annular cover (20) by multiple bolts. The inner sidewall of the annular cover (20) is provided with a sealing ring. The outer sidewall of the inner ring (4) is press-fitted with the inner sidewall of the sealing ring.

6. The automatic flywheel grease injection device according to claim 5, characterized in that, A third annular groove (21) is provided on the side wall of the annular cover (20) away from the flywheel (7). An annular plate (22) is fixedly connected to the inner wall of the third annular groove (21). A plurality of filter holes (23) are evenly distributed on the side wall of the annular plate (22). The plurality of filter holes (23) are divided into four arrangement areas along the side wall of the annular plate (22). A first pipe (26) is fixedly connected to the bottom of the third annular groove (21). A second pipe (27) is fixedly connected between the bottom of the first annular groove (8) corresponding to the grease inlet pipe (12) and the inner wall of the limiting annular groove (19).

7. The automatic flywheel grease injection device according to claim 6, characterized in that, The first tube (26) and the second tube (27) are facing each other, and the second tube (27) is equipped with a one-way valve that allows grease to enter the first annular groove (8) from the first tube (26).

8. The automatic flywheel grease injection device according to claim 6, characterized in that, Two rotating rings (24) are fixedly connected to the inner wall of the outer ring (3). The outer walls of the two rotating rings (24) are respectively attached to the inner walls of the two corresponding fixed rings (2). The inner walls of the two rotating rings (24) are provided with spiral grooves (25). The spiral grooves (25) located in the two mounting seats (1) have opposite directions of rotation.

9. The automatic flywheel grease injection device according to claim 8, characterized in that, The inner wall of the third annular groove (21) is elastically connected to four iron plates (29) by multiple springs (28). The four iron plates (29) are located in four arrangement areas respectively. Multiple unblocking rods (30) are fixedly connected to the side walls of the four iron plates (29) away from the springs (28). The multiple unblocking rods (30) correspond one-to-one with multiple filter holes (23). A permanent magnet block (31) is fixedly connected to the inner side wall of the rotating ring (24) near the annular plate (22).

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