Symmetrical polishing device for slip ring of generator

Abstract

The invention belongs to the technical field of generator production, and particularly relates to a generator slip ring symmetric polishing device which comprises a polishing ring and a driver, in a polishing state, a flexible polishing ring with a polishing surface attached to a conductive surface of a conductive slip ring forms a non-closed annular structure with a separation seam, and the two sides of the separation seam of the polishing ring are mutually tightened, so that the polishing effect is improved. The attaching force of the polishing surface of the polishing ring to the conductive surface of the conductive slip ring is increased, and the outer surface of the polishing ring is provided with a hook surface magic tape; each driver comprises a hinged plate, a rough-surface magic tape and a hinged rod, the multiple hinged plates are sequentially hinged through the hinged rods to form an annular structure, the rough-surface magic tape is fixed to the side, facing the center of the annular structure, of each hinged plate, and the rough-surface magic tape and the hook-surface magic tape are detachably fixed. And the concentricity of polishing the conductive slip ring can still be improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of generator production, and particularly relates to a symmetrical polishing device for a generator slip ring. BACKGROUND

[0002] The material difference between the conductive slip ring and the brush causes the soft brush to wear out and the hard slip ring surface to have scratches and pits due to friction accumulation when the two are in long-term sliding friction. The longer the operation time, the more obvious the wear marks. In addition, due to the chemical properties of the copper-based slip ring, copper oxide is naturally formed in the air (containing oxygen and water vapor). If the environment contains sulfur (such as industrial dust and fuel exhaust), copper sulfide will also be generated. These compounds will gradually accumulate on the surface. Moreover, graphite powder generated from brush wear, dust and oil stains from the outside due to poor equipment sealing will enter and mix with the carbon powder, adhering to the surface of the slip ring. The chain reaction caused by the above defects will cause the contact resistance to increase (caused by wear and oxidation layer) and generate heat to cause "ring fire", which melts the surface of the slip ring at high temperature, and then forms a depression after cooling. Therefore, the surface of the conductive slip ring needs to be polished after long-term use to eliminate the above defects and restore the conductive contact. However, this polishing method is generally used in large-scale power generation equipment. The conductive slip ring of such equipment is large in size and high in price. For the user, polishing and repair is a better treatment method, which can save costs. Different models of generators have different difficulties and weights in disassembling the conductive slip ring, but the non-disassembly polishing method is generally used for simple treatment. Since the conductive slip ring cannot rotate actively when the generator is polished, only the polishing device can be used to rotate for polishing. Moreover, professional cutting equipment cannot be used when polishing the conductive slip ring. It is difficult to ensure the concentricity of the conductive slip ring after polishing because it is difficult to determine the concentric position when the polishing device is fixed. If the fixed position of the device is not correct, the originally circular conductive slip ring will become a non-circular shape after polishing. SUMMARY

[0003] To solve the problems in the background art, the application provides a symmetrical polishing device for a generator slip ring, which can improve the concentricity of the conductive slip ring when the fixed position of the polishing device has deviation.

[0004] To achieve the above-mentioned purpose, the application provides the following technical solution: a symmetrical polishing device for a generator slip ring, comprising a polishing ring and a transmission device. In the polishing state, the polishing surface of the flexible polishing ring is attached to the conductive surface of the conductive slip ring to form a non-closed ring structure with a separation gap. By tightening the two sides of the separation gap of the polishing ring, the tightness of the polishing surface of the polishing ring to the conductive surface of the conductive slip ring is increased. The outer surface of the polishing ring is provided with a hook surface magic sticker. The transmission device comprises articulated plates, rough surface magic adhesives and articulated rods, a plurality of articulated plates are articulated in sequence into a ring structure through the articulated rods, the rough surface magic adhesives are fixed on one side of the articulated plates towards the center of the ring structure, and the rough surface magic adhesives are detachably fixed with hook surface magic adhesives.

[0005] As a kind of generator slip ring symmetrical polishing device of the application preferably, the separation slit is arranged obliquely to the ring tangent direction of polishing ring.

[0006] As a kind of generator slip ring symmetrical polishing device of the application preferably, the inside of the polishing ring on both sides of the separation slit is fixedly connected with inner rods, the two ends of one of the inner rods are fixedly connected with clamping joints, the inner side of the clamping joint is provided with clamping teeth, the two ends of the other inner rod are fixedly connected with limiting pieces, and the inner side of the limiting piece is clampedly connected with clamping strips for cooperating with the clamping teeth.

[0007] As a kind of generator slip ring symmetrical polishing device of the application preferably, the clamping strip comprises a limiting head clamped with the limiting piece, one end of the limiting head is fixedly connected with one end of a clamping ring, and the other end of the clamping ring is fixedly connected with a pull head.

[0008] As a kind of generator slip ring symmetrical polishing device of the application preferably, the side of the articulated plate away from the rough surface magic adhesive is fixedly connected with a stress plate.

[0009] As a kind of generator slip ring symmetrical polishing device of the application preferably, the outside of the articulated plate articulated in sequence into a ring structure is sleeved with a transmission ring, the inner side of the transmission ring is rotatably connected with a plurality of driving wheels, and the driving wheels are used to contact with the stress plate.

[0010] As a kind of generator slip ring symmetrical polishing device of the application preferably, the outer surface of the rotor shaft or the conductive slip ring is contact-connected with an extrusion block, one end of the extrusion block is threadedly connected with a threaded rod, the outer side of one end of the threaded rod is threadedly connected with a threaded seat, one end of the threaded seat is fixedly connected on the surface of a base ring, the number of threaded seats on one base ring is not less than three and is distributed at equal intervals, the number of base rings is two and is symmetrically distributed on both sides of the polishing ring, the inner side of the base ring is rotatably connected with a plurality of bevel gears, one of the bevel gears is driven by a driving motor, and the driving motor is fixedly connected on the base ring through a right-angle support.

[0011] As a kind of generator slip ring symmetrical polishing device of the application preferably, the plurality of bevel gears distributed on one base ring are jointly meshed with a bevel gear ring, and the side plane part of the bevel gear ring is used to extrude and contact with the surface of the driving wheel.

[0012] As a kind of generator slip ring symmetrical polishing device of the application preferably, a through hole is formed in the base ring, two base rings are installed with connecting vice screws through the formed through hole, the outer side of the screw rod of the connecting vice screw is sleeved with a sleeve pipe, and the two ends of the sleeve pipe are respectively in contact with the surfaces of the two base rings.

[0013] Preferably, at least one of the shafts for driving the wheels to rotate is a lengthened shaft capable of colliding with the sleeve.

[0014] Compared with the prior art, the present application has the beneficial effect that when the position of the polishing device is deviated, the concentricity of the polished conductive slip ring can still be improved, the polishing ring is sleeved on the conductive surface of the conductive slip ring, and then the polishing ring is tightened at the separation joint. The greater the tightening force is, the greater the extrusion force of the polishing ring on the conductive surface of the conductive slip ring is. After the tightening of the polishing ring, the force distribution acting on the conductive slip ring is uniform. When the polishing ring rotates as a whole, the situation that the force applied by the traditional device is deviated due to the deviation of the fixed position of the device does not occur. The use of the polishing ring for polishing, the driving of the polishing ring to rotate and the reduction of the radial pulling force on the polishing ring can be realized by the transmission. The hinged plates can be disassembled or connected into a ring shape by the insertion and extraction of the hinge rods. When the strip-shaped hinged plates are surrounded outside the polishing ring, the hinged plates will be fixed with the hook magic sticker on the polishing ring by the magic sticker. When the hinged plates are surrounded into a ring shape, the originally strip-shaped structure is connected into a stable ring shape by the hinge rods. At this time, the rotary transmission can drive the polishing ring to rotate to polish the conductive slip ring. Since the transmission drives the polishing ring to rotate by the magic sticker, the force applied by the transmission to the polishing ring to force it to rotate is along the tangent direction of the polishing ring. Therefore, the polishing ring will not be disturbed by the force in the radial direction when the transmission drives the polishing ring to rotate. Therefore, the polishing force will not be uneven. At the same time, the magic sticker is relatively soft. The magic sticker can be set to be relatively thick so that it can be extruded or stretched within a certain limit under the action of external force. Therefore, when the concentricity of the transmission surrounded into a circle and the conductive slip ring is not high, the deformability of the magic sticker (the deformation force is not elastic deformation) can avoid the interference of the force in the radial direction on the polishing ring during the polishing work when the transmission drives the polishing ring to rotate. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and are included to provide a further understanding of the application, and are made a part of the specification. In the drawings: Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the local structure of the present application; Figure 3 is an exploded view of the overall structure of the present application; Figure 4 is a schematic diagram of the overall structure of the driver in the present application; Figure 5 is a schematic diagram of the overall structure of the transmission in the present application; Figure 6 The schematic diagram of the connecting structure of the hinged plate in the application; Figure 7 The schematic diagram of the overall structure of the polishing ring in the application; Figure 8 The schematic diagram of the connecting structure of the clamping joint in the application; Figure 9 The schematic diagram of the connecting structure of the clamping strip in the application; In the figure: 1, rotor shaft; 2, conductive slip ring; 3, polishing ring; 4, transmission; 5, transmission ring; 6, helical gear; 7, driver; 8, connecting vice screw; 9, sleeve; 301, separation gap; 302, inner rod; 303, clamping joint; 304, clamping tooth; 305, limiting piece; 306, clamping strip; 307, limiting head; 308, clamping ring; 309, puller; 310, polishing surface; 311, hook face magic sticky; 401, hinged plate; 402, rough surface magic sticky; 403, hinged rod; 404, stress plate; 501, drive wheel; 502, extended shaft; 701, base ring; 702, through hole; 703, bevel gear; 704, right-angle support; 705, drive motor; 706, threaded seat; 707, threaded rod; 708, extrusion block; 709, extension piece; DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0017] As shown in the figure: Figures 1-9 A generator slip ring symmetrical polishing device, comprising a polishing ring 3 and a transmission 4, in a polishing state, the polishing surface 310 is attached to the flexible polishing ring 3 at the conductive surface of the conductive slip ring 2 to form a non-closed ring structure with a separation gap 301, by tightening the two sides of the separation gap 301 of the polishing ring 3, the tightening force of the polishing surface 310 of the polishing ring 3 on the conductive surface of the conductive slip ring 2 is increased, and the outer surface of the polishing ring 3 is provided with a hook face magic sticky 311; ​The transmission 4 comprises a hinged plate 401, a rough surface magic sticky 402 and a hinged rod 403, a plurality of hinged plates 401 are hinged in sequence into a ring structure through the hinged rod 403, the rough surface magic sticky 402 is fixed on one side of the hinged plate 401 towards the center of the ring structure, and the rough surface magic sticky 402 is detachably fixed with the hook surface magic sticky 311.

[0018] The difference in material between the conductive slip ring 2 and the brush causes the soft brush to wear out when they slide for a long time, and the hard slip ring surface will also have scratches and pitting due to friction accumulation, and the longer the running time, the more obvious the wear marks; in addition, due to the chemical properties of copper-based slip rings, copper oxide will naturally form in the air (containing oxygen, water vapor), and if the environment has sulfur (such as industrial dust, fuel exhaust), copper sulfide will also be generated, these compounds will gradually accumulate on the surface; not only that, graphite powder generated from brush wear, external due to poor equipment sealing, dust, oil stains will enter and mix with carbon powder, adhere to the surface of the slip ring; the chain reaction caused by the above defects will cause the contact resistance to increase (caused by wear and oxidation layer) and generate heat to trigger "ring fire", which melts the surface of the slip ring at high temperature, and then forms a depression after cooling. Therefore, the surface of the conductive slip ring 2 needs to be polished after long-term use to eliminate the above defects and restore the conductive contact. However, this polishing method is generally used in large power generation equipment, and the conductive slip ring 2 of such equipment is large in size and high in price. For users, polishing repair is a better treatment method that can save costs; Different models of generators have different difficulties and weights in disassembling the conductive slip ring 2, but the general method of polishing without disassembly is relatively simple. Since the generator cannot actively rotate the conductive slip ring 2 when polishing, only the polishing device can be used to rotate the conductive slip ring 2. When polishing the conductive slip ring 2, professional cutting equipment cannot be used, and it is difficult to ensure the concentricity of the conductive slip ring 2 after polishing. This is because it is difficult to determine the concentric position when the polishing device is fixed, and if the device is not fixed correctly, the originally circular conductive slip ring 2 will become a non-circular shape after polishing. The scheme improves the concentricity of the polishing conductive slip ring 2 when the position of the polishing device is deviated, and the polishing ring 3 is sleeved on the conductive surface of the conductive slip ring 2, and then the polishing ring 3 is tightened at the separation joint 301. The greater the tightening force is, the greater the extrusion force of the polishing ring 3 on the conductive surface of the conductive slip ring 2 is. After the tightening of the polishing ring 3, the force distribution acting on the conductive slip ring 2 is uniform. When the polishing ring 3 rotates as a whole, the force deviation caused by the deviation of the position of the traditional device does not occur. The use of the polishing ring 3 for polishing, the rotation of the polishing ring 3 and the reduction of the radial pulling force on the polishing ring 3 can be realized by the transmission device 4. The hinge plates 401 can be separated or connected into a ring shape by the insertion and extraction of the hinge rods 403. This is the same as the principle and operation mode of the traditional precision steel watch chain. When the strip-shaped hinge plates 401 are wrapped around the outside of the polishing ring 3, the hinge plates 401 can be fixed with the hook magic sticky 311 on the polishing ring 3 by the magic sticky 402. When the hinge plates 401 are wrapped into a ring shape, the originally strip-shaped structure is connected into a stable ring shape by the hinge rods 403. At this time, the rotation of the transmission device 4 can drive the polishing ring 3 to rotate and polish the conductive slip ring 2. Since the transmission device 4 drives the polishing ring 3 to rotate by the magic sticky, the force applied by the transmission device 4 on the polishing ring 3 to make it rotate is along the tangent direction of the polishing ring 3. Therefore, the polishing ring 3 is not disturbed by the force in the radial direction when the transmission device 4 drives the polishing ring 3 to rotate. Therefore, the polishing force is uniform. In addition, the magic sticky is relatively soft, and the magic sticky can be set to be relatively thick so that it can be extruded or stretched within a certain limit under the action of external force. Therefore, when the concentricity of the transmission device 4 wrapped into a circle and the conductive slip ring 2 is not high, the deformability of the magic sticky (the deformation force is not elastic deformation) can avoid the interference of the force in the radial direction on the polishing ring 3 during the polishing work of the polishing ring 3. The size of the polishing ring 3 can be selected according to the size of the conductive slip ring 2. The polishing surface 310 of the polishing ring 3 can be a sandpaper separated from the main body of the polishing ring 3. The sandpaper can be fixed on the main body of the polishing ring 3 by the magic sticky.

[0019] In an optional embodiment, the separation joint 301 is inclined relative to the tangential direction of the ring shape of the polishing ring 3.

[0020] In this embodiment, as shown in Figure 7 The inclination of the separation joint 301 is beneficial to the discharge of the powdery particles generated during polishing.

[0021] In an optional embodiment, the inner side of the polishing ring 3 on both sides of the separation gap 301 is fixedly connected with an inner rod 302, one end of the inner rod 302 is fixedly connected with a clamping head 303, the inner side of the clamping head 303 is provided with a clamping tooth 304, and the other end of the inner rod 302 is fixedly connected with a limiting piece 305, and the inner side of the limiting piece 305 is clamped with a clamping strip 306 used for cooperating with the clamping tooth 304.

[0022] In this embodiment, when the polishing ring 3 is tightened from the separation gap 301, one end of the clamping strip 306 is clamped and fixed with the limiting piece 305, the clamping part of the clamping strip 306 is inserted into the clamping head 303 and clamped with the clamping tooth 304, and the tightening is realized.

[0023] In an optional embodiment, the clamping strip 306 includes a limiting head 307 clamped with the limiting piece 305, one end of the limiting head 307 is fixedly connected with one end of a clamping ring 308, and the other end of the clamping ring 308 is fixedly connected with a pull head 309.

[0024] In this embodiment, the limiting head 307 can be clamped with the shape of the limiting piece 305, the clamping ring 308 can be clamped with the clamping tooth 304, and the pull head 309 is convenient to pass through the clamping head 303, and then pull the pull head 309, which is convenient for the clamping ring 308 to pass through the clamping head 303. The principle of the clamping head 303, the clamping tooth 304 and the clamping ring 308 is the same as that of the plastic cable tie, and the material can also be the same. The clamping strip 306 in this embodiment is disposable, and when it needs to be disassembled after passing through, the clamping ring 308 can be cut off by using scissors.

[0025] In an optional embodiment, the side of the hinged plate 401 away from the rough surface magic tape 402 is fixedly connected with a stress plate 404.

[0026] In this embodiment, when the stress plate 404 is rotated from both sides, it is more difficult to generate a force in the radial direction.

[0027] In an optional embodiment, the outer side of the hinged plate 401 which is sequentially hinged into a ring structure is provided with a transmission ring 5, and the inner side of the transmission ring 5 is rotatably connected with a plurality of drive wheels 501, and the drive wheels 501 are used to contact the stress plate 404.

[0028] In the embodiment, the two transmission rings 5 with different diameters are sleeved with each other, a plurality of driving wheels 501 are arranged between the two transmission rings 5 with different diameters, and a rotating shaft is welded and fixed between the two transmission rings 5 with different diameters. The driving wheels 501 rotate relative to the rotating shaft. When the plurality of driving wheels 501 on the same group of transmission rings 5 are in contact with the stress plates 404, part of the driving wheels 501 can be in contact with the stress plates 404, and the other part of the driving wheels 501 is located in the gap between the two stress plates 404. In this way, the driving wheels 501 can drive the stress plates 404 to rotate more stably and reduce vibration when the driving wheels 501 drive the stress plates 404 to rotate. Of course, the driving wheels 501 on the two sides of the stress plates 404 are symmetrically arranged.

[0029] In an optional embodiment, the outer surface of the rotor shaft 1 or the conductive slip ring 2 is connected with an extrusion block 708, one end of the extrusion block 708 is threadedly connected with a threaded rod 707, the outer side of one end of the threaded rod 707 is threadedly connected with a threaded seat 706, one end of the threaded seat 706 is fixedly connected at the surface of the base ring 701, the number of the threaded seats 706 on one base ring 701 is not less than three and is distributed at equal intervals, the number of the base rings 701 is two and is symmetrically distributed on the two sides of the polishing ring 3, the inner side of the base ring 701 is rotatably connected with a plurality of bevel gears 703, one of the bevel gears 703 is driven by a driving motor 705, and the driving motor 705 is fixedly connected to the base ring 701 by a right-angle support 704. The plurality of bevel gears 703 distributed on one base ring 701 are jointly meshed with a bevel gear ring 6, and the plane part on one side of the bevel gear ring 6 is used for extruding contact with the surface of the driving wheel 501.

[0030] In the embodiment, as shown in Figure 4 The driver 7 includes the base ring 701, the through hole 702, the bevel gear 703, the right-angle support 704, the driving motor 705, the threaded seat 706, the threaded rod 707, the extrusion block 708, and the extension piece 709, as shown in Figure 1 The driver 7 has two and is respectively located on the two sides of the polishing ring 3, so that the plurality of bevel gears 703 in one driver 7 are jointly meshed with the bevel gear ring 6, and the plane of the bevel gear ring 6 is extruded on one side of the stress plate 404 by the driving wheel 501. It is equivalent to that the bevel gear ring 6 is extruded and clamped by the bevel gear 703 and the driving wheel 501, so that the bevel gear ring 6 can stably rotate. The position of the extrusion block 708 is adjusted by rotating the threaded rod 707 to make the extrusion block 708 contact the surface of the rotor shaft 1 or the conductive slip ring 2, so as to fix the position of the base ring 701 relative to the conductive slip ring 2. One of the bevel gears 703 is driven by the driving motor 705 to rotate, which drives the bevel gear 6 to rotate, and the bevel gear 6 drives the driving wheel 501 to rotate through friction, which drives the stress plate 404 to rotate, and the stress plate 404 drives the transmission 4 to rotate, which drives the polishing ring 3 to rotate to polish the conductive slip ring 2. When the extrusion block 708 in one of the drivers 7 can directly contact the rotor shaft 1 or the conductive slip ring 2, and the extrusion block 708 in the other driver 7 cannot directly contact the rotor shaft 1 or the conductive slip ring 2, the extrusion block 708 is replaced by the extension piece 709, so that the extension piece 709 contacts the rotor shaft 1 or the conductive slip ring 2. The extension piece 709 and the extrusion block 708 are the same, and are detachable or installable through threaded connection.

[0031] In an optional embodiment, the base ring 701 is provided with a through hole 702, and the two base rings 701 are installed with a connecting vice screw 8 through the through hole 702. The outer side of the screw rod of the connecting vice screw 8 is sleeved with a sleeve 9, and the two ends of the sleeve 9 are in contact with the surfaces of the two base rings 701.

[0032] In this embodiment, the positions between the two drivers 7 need to be relatively stable and fixed, which can be achieved by the connecting vice screw 8. The connecting vice screw 8 is a complete screw and nut combination. The screw passes through the through hole 702 and is locked by the nut, so that the two base rings 701 can be close to each other and extrude the sleeve 9. The sleeve 9 avoids excessive extrusion between the two base rings 701 and increases the connection stability between the two drivers 7.

[0033] In an optional embodiment, at least one of the shafts for driving the driving wheel 501 to rotate is provided as a lengthened shaft 502 capable of colliding with the sleeve 9.

[0034] In this embodiment, in the work of driving the driving wheel 501 to rotate and driving the stress plate 404 to rotate through the bevel gear 6, the transmission ring 5 itself cannot rotate, that is, the driving wheel 501 can only rotate around its own axis but cannot revolve around the transmission ring 5. Therefore, the transmission ring 5 needs to be prevented from rotating. The lengthened shaft 502 is provided, and the transmission ring 5 will rotate under the driving of the bevel gear 6. When the transmission ring 5 drives the lengthened shaft 502 to collide with the sleeve 9, the transmission ring 5 cannot continue to rotate, thereby limiting the rotation of the transmission ring 5.

[0035] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalent ones. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A generator slip ring symmetrical polishing apparatus, characterized by: The device includes a grinding ring (3) and a transmission device (4). In the grinding state, the grinding surface (310) of the flexible grinding ring (3) is attached to the conductive surface of the conductive slip ring (2) to form a non-closed ring structure with a partition slit (301). By tightening the two sides of the partition slit (301) of the grinding ring (3) against each other, the adhesion force of the grinding surface (310) of the grinding ring (3) to the conductive surface of the conductive slip ring (2) is increased. The outer surface of the grinding ring (3) is provided with hook-and-loop fastener (311). The transmission device (4) includes a hinge plate (401), a textured hook and loop fastener (402), and a hinge rod (403). Several hinge plates (401) are sequentially hinged into a ring structure through the hinge rod (403). A textured hook and loop fastener (402) is fixed on the side of the hinge plate (401) facing the center of the ring structure. The textured hook and loop fastener (402) and the hook and loop fastener (311) are detachably fixed.

2. The generator slip ring symmetrical polishing apparatus of claim 1, wherein: The separation seam (301) is inclined relative to the annular tangential direction of the grinding ring (3).

3. The generator slip ring symmetrical polishing apparatus of claim 1, wherein: The grinding rings (3) located on both sides of the partition (301) are fixedly connected with inner rods (302). One inner rod (302) is fixedly connected to two ends with a snap connector (303). The snap connector (303) has a snap tooth (304) on its inner side. The other inner rod (302) is fixedly connected to two ends with a limiting member (305). The limiting member (305) has a snap strip (306) on its inner side for engaging with the snap tooth (304).

4. The generator slip ring symmetrical polishing apparatus of claim 3, wherein: The locking strip (306) includes a limiting head (307) that engages with the limiting member (305). One end of the limiting head (307) is fixedly connected to one end of the retaining ring (308), and the other end of the retaining ring (308) is fixedly connected to a pull head (309).

5. The generator slip ring symmetrical polishing apparatus of claim 1, wherein: A load-bearing plate (404) is fixedly connected to the side of the hinge plate (401) away from the hook and loop fastener (402).

6. The generator slip ring symmetrical polishing apparatus of claim 5, wherein: A transmission ring (5) is sleeved on the outer side of a hinge plate (401) that is sequentially hinged into a ring structure. Several drive wheels (501) are rotatably connected to the inner side of the transmission ring (5). The drive wheels (501) are used to contact the force plate (404).

7. The generator slip ring symmetrical polishing apparatus of claim 6, wherein: The outer surface of the rotor shaft (1) or the conductive slip ring (2) is connected to an extrusion block (708). One end of the extrusion block (708) is threaded to a threaded rod (707). One end of the threaded rod (707) is threaded to a threaded seat (706). One end of the threaded seat (706) is fixedly connected to the surface of the base ring (701). There are no less than three threaded seats (706) on a base ring (701) and they are evenly spaced. There are two base rings (701) and they are symmetrically distributed on both sides of the grinding ring (3). Several helical gears (703) are rotatably connected to the inner side of the base ring (701). One of the helical gears (703) is driven by a drive motor (705). The drive motor (705) is fixedly connected to the base ring (701) by a right-angle bracket (704).

8. The generator slip ring symmetrical polishing apparatus of claim 7, wherein: A plurality of helical gears (703) distributed on a base ring (701) mesh together to connect a helical gear ring (6), and one side plane portion of the helical gear ring (6) is used for surface compression contact with the drive wheel (501).

9. The generator slip ring symmetrical polishing apparatus of claim 7, wherein: The base ring (701) is provided with a through hole (702), and two base rings (701) are installed with connecting pair screws (8) through the through hole (702). The outer side of the screw rod of the connecting pair screw (8) is sleeved with a sleeve (9), and the two ends of the sleeve (9) are in contact with the surfaces of the two base rings (701) respectively.

10. The generator slip ring symmetrical polishing apparatus of claim 9, wherein: The shaft for driving the wheel (501) to rotate is at least one lengthened shaft (502) capable of colliding with the sleeve (9).

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