A collector ring grinding tool

Abstract

The present invention relates to the field of wind turbines, and discloses a collector ring grinding tool, including a bracket for storing grinding materials, the bracket being connected to a fixing device for fixing the bracket to the bottom of the collector ring, and an adjusting device for adjusting the lifting of the fixing device. The grinding tool of the present invention is easy to operate, which can save a lot of working time for the staff, and more importantly, it can ensure the personal safety of the staff, prevent entanglement and injury accidents at the rotating parts, and can automatically grind without the staff operating the grinding tool all the time, and at the same time, it does not affect the normal work in the unit and does not cause any impact on the bracket.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine generator sets, and in particular to a collector ring grinding tool. Background Art

[0002] In the wind power industry, due to poor contact between the carbon brushes and the collector rings of wind turbine generator sets (hereinafter referred to as the sets) or vibration of the generator bearings, discharge occurs between the carbon brushes and the collector rings when the wind turbine sets are running, causing carbon solids to adhere to the surface of the collector rings. After a period of operation, the amount of carbon solids increases. As the "jump" amplitude of the generator carbon brushes becomes larger and larger, "sparks" occur between the carbon brushes and the collector rings, causing the generator to shut down due to overcurrent on the machine side. Under the action of high temperature, many rough small particles are generated on the surface of the collector rings, and there is a safety hazard of causing fire.

[0003] In order to deal with the rough surface of the collector ring caused by the "sparking" of the collector ring, daily maintenance personnel usually need to grind the collector ring. When grinding the collector ring, the unit brake system needs to be opened to let the generator rotate naturally. The maintenance personnel need to hold the grinding stone (grinding material) by hand and press it on the collector ring. Since this part is a rotating part, entanglement accidents are prone to occur; and according to the severity of the collector ring "sparking", the maintenance personnel need to hold the grinding stone (grinding material) for a long working time to grind the collector ring until the surface of the collector ring is polished to a smooth degree. There are great safety hazards for personnel and it takes a long working time.

[0004] A Chinese patent with application number CN201922172186.X discloses a generator collector ring grinding tool, which includes an arc-shaped sandpaper holder that can match and fit with the outer surface of the generator collector ring, sandpaper is arranged on the inner wall of the sandpaper holder, a handle base is arranged on the outer wall of the sandpaper holder, and a handle is arranged on the handle base; this technical solution can effectively avoid the current treatment of collector ring surface defects, which is often performed by manual hand-held sandpaper grinding, with high labor intensity and low work efficiency. However, due to the complex assembly of many parts such as the generator set, carbon brushes, carbon brush holders and collector rings in the collector ring chamber, the grinding tool cannot reach the outer side of the collector ring at all, so it is impossible to grind the collector ring from the side. If the device is to grind the collector ring, the unit can only be shut down, and then the collector ring is disassembled from the collector ring chamber for grinding and then assembled again, which will waste huge manpower, material resources and time costs, and greatly reduce work efficiency, affecting the normal operation of the unit; on the other hand, the device requires personnel to hold the handle all the time when in use, which is inconvenient to operate and wastes manpower. Summary of the invention

[0005] The purpose of the present invention is to provide a collector ring grinding tool, which can keep the grinding material in the bracket in reliable contact with the collector ring at the bottom of the collector ring at all times, and can automatically grind without personnel operating the grinding tool all the time, while not affecting the normal work of the unit.

[0006] The embodiments of the present invention are implemented by the following technical solutions:

[0007] A collector ring grinding tool comprises a bracket for storing grinding materials, the bracket is connected with a fixing device for fixing the bracket to the bottom of the collector ring, and an adjusting device for adjusting the lifting and lowering of the fixing device.

[0008] Furthermore, the fixing device comprises a connecting rod group arranged at the bottom of the bracket, one end of the connecting rod group is hinged to the bottom of the bracket, and the adjusting device is arranged at the other end of the connecting rod group and the adjusting device is used to adjust the lifting and lowering of the connecting rod group.

[0009] Furthermore, the connecting rod group includes a first connecting rod and a second connecting rod hinged to each other, the end of the first connecting rod away from the hinged end is hinged to the bottom of the bracket, and the end of the second connecting rod away from the hinged end is connected to the adjusting device.

[0010] Furthermore, the fixing device also includes a support frame arranged below the bracket, one end of the support frame is arranged below the bracket, and the other end of the support frame extends to the outer edge of the collector ring chamber; a plurality of support rods are evenly arranged at the bottom of the bracket, one end of the support rod is hinged to the bottom of the bracket, and the other end of the support rod is hinged to the front end of the support frame; the bracket is relatively fixed to the support frame through the support rods.

[0011] Furthermore, four support rods are provided, and the four support rods are evenly distributed at the four corners of the bottom of the bracket.

[0012] Furthermore, a fixing rod is arranged at the front end of the support frame along the width direction of the support frame, and both ends of the fixing rod are rotatably connected to the two side edges of the support frame respectively, and the end of the support rod away from the bracket is hinged to the fixing rod; a through hole for the fixing rod to pass through is opened in the middle part of the first connecting rod, so that the first connecting rod can be rotatably connected to the fixing rod.

[0013] Furthermore, the adjusting device includes a rotating shaft, a sleeve mounted on the rotating shaft, and an operating rod fixedly connected to the sleeve; the rotating shaft is transversely arranged at the end of the support frame away from the bracket; a compression spring is arranged in the inner cavity of the sleeve, and the sleeve is rotatably connected to the rotating shaft through the compression spring; the operating rod is used to drive the sleeve to rotate relative to the rotating shaft; the end of the connecting rod away from the bracket is fixedly connected to the sleeve.

[0014] Furthermore, a fixing ring is provided on the sleeve, the fixing ring is fixedly connected to the sleeve, one end of the connecting rod away from the bracket is sleeved in the fixing ring, and a fixing piece for fixing the connecting rod is provided on the fixing ring.

[0015] Furthermore, the sleeve includes a left sleeve and a right sleeve that mesh with each other, and the meshing parts of the left sleeve and the right sleeve are respectively provided with transmission teeth; the compression spring is arranged in the right sleeve, and the operating rod is arranged on the right sleeve; the fixing ring is arranged on the left sleeve.

[0016] Furthermore, the adjustment device also includes a clamping plate arranged at the bottom of one end of the support frame away from the bracket, and the clamping plate is used to be fixed to the edge of the collector ring chamber; a lever spring is arranged on the operating rod, and the operating rod and the clamping plate are connected through the lever spring.

[0017] Furthermore, a cover plate is provided on the upper surface of the support frame, and the second connecting rod passes through the cover plate and is hinged to the first connecting rod.

[0018] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0019] 1. When the grinding tool of the present invention is working, personnel can adjust the position of the bracket outside the collector ring chamber so that the grinding material in the bracket can always maintain reliable contact with the collector ring at the bottom of the collector ring. Automatic grinding can be achieved without the need for personnel to operate the grinding tool all the time, and the normal work in the unit will not be affected and the bracket will not be caused any impact. At the same time, the free rotation of the generator of the unit can be used to achieve the purpose of automatic grinding of the collector ring, avoiding the risks brought by manual grinding.

[0020] 2. The grinding tool of the present invention is easy to operate, which can save the staff a lot of working time. More importantly, it can ensure the personal safety of the staff and prevent entanglement and injury accidents at the rotating parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of the structure of a slip ring grinding tool provided in an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the structure of an adjusting device provided in an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the structure of a right sleeve provided in an embodiment of the present invention;

[0025] Figure 4 A simplified diagram of an application scenario of a grinding tool provided in an embodiment of the present invention.

[0026] Icons: 1- bracket, 2- support rod, 3- fixed rod, 4- support frame, 5- connecting rod group, 51- first connecting rod, 52- second connecting rod, 6- cover plate, 7- adjusting device, 71- sleeve, 711- left sleeve, 712- right sleeve, 72- rotating shaft, 73- operating lever, 74- clamp, 75- lever spring, 76- fixing part, 77- fixing ring, 78- compression spring, 8- collector ring, 9- collector ring chamber, 10- carbon brush holder. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Example

[0033] The present embodiment provides a collector ring grinding tool, including a bracket 1 for storing grinding materials, the bracket 1 is connected to a fixing device for fixing the bracket 1 to the bottom of the collector ring 8, and an adjusting device 7 for adjusting the lifting and lowering of the fixing device; specifically, the fixing device includes a connecting rod group 5 arranged at the bottom of the bracket 1, one end of the connecting rod group 5 is hinged to the bottom of the bracket 1, and the other end of the connecting rod group 5 is provided with an adjusting device 7 for adjusting the lifting and lowering of the connecting rod group 5.

[0034] Before grinding, place the grinding material, such as a grinding stone, in the bracket 1, and then extend the bracket 1 to the bottom of the collector ring 8 so that the bracket 1 is aligned with the position of the collector ring 8 to be ground; push the connecting rod group 5 to the working position, and through the hinged connection of the connecting rod group 5 under the bracket 1, make the bracket 1 with the grinding stone contact the surface of the collector ring 8 (the significance of the design of this mechanism is to bypass certain obstructions under and on the side of the collector ring 8, such as carbon brushes and carbon brush holders 10, etc.), and then adjust the upward rise of the connecting rod group 5 through the adjustment device 7, thereby driving the bracket 1 to lift upward, so that the grinding material can always keep in contact with the collector ring 8 for grinding; the operator can hold the connecting rod group 5, so that the bracket 1 is fixed to the bottom of the collector ring 8 for grinding.

[0035] In this embodiment, the connecting rod group 5 includes a first connecting rod 51 and a second connecting rod 52 that are hinged to each other, one end of the first connecting rod 51 away from the hinge end is hinged to the bottom of the bracket 1, and one end of the second connecting rod 52 away from the hinge end is connected to the fixing ring 77. The first connecting rod 51 and the second connecting rod 52 that are hinged to each other are used to adjust the lifting of the bracket 1, so that the rotation of the left sleeve 711 drives the second connecting rod 52 to move forward, and then the forward moving force can be transmitted to the hinged first connecting rod 51, driving the first connecting rod 51 to generate an upward force, thereby driving the bracket 1 to lift upward.

[0036] However, in order to free the hands of the operator, save labor, and make the position adjustment of the bracket 1 more convenient, in this embodiment, a support frame 4 is also arranged horizontally below the bracket 1, one end of the support frame 4 is arranged below the bracket 1, and the other end of the support frame 4 extends to the outer edge of the collector ring chamber 9; a plurality of support rods 2 are evenly arranged at the bottom of the bracket 1, one end of the support rod 2 is hinged to the bottom of the bracket 1, and the other end of the support rod 2 is hinged to the front end of the support frame 4; the bracket 1 is relatively fixed to the support frame 4 through the support rod 2. The bracket 1 and the support frame 4 are connected together by the support rod 2, so that the operation of the bracket 1 is more stable, and the multiple support rods 2 and the connecting rod group 5 are hinged between the bracket 1 and the support frame 4, so that it is convenient to adjust the height of the bracket 1 by using the support rod 2 and the connecting rod group 5; at the same time, the relative stability between the bracket 1 and the support frame 4 is maintained.

[0037] In order to make the bracket 1 more stable, at least four support rods 2 are provided, and the four support rods 2 are evenly distributed at the four corners of the bottom of the bracket 1, that is, two support rods 2 are provided in parallel on both sides of the bracket, so the two support rods 2 on the same side of the support frame 6 form a four-bar structure with the bottom of the bracket 1 and the support frame 6, which not only makes the rising and falling adjustment of the bracket 1 more convenient but also makes the bracket 1 more stable after adjustment.

[0038] In this embodiment, the adjusting device 7 includes a rotating shaft 72, a sleeve 71 sleeved on the rotating shaft 72, and an operating rod 73 fixedly connected to the sleeve 71; the rotating shaft 72 is transversely arranged at the end of the support frame 4 away from the bracket 1; a compression spring 78 is arranged in the inner cavity of the sleeve 71, and the sleeve 71 is rotatably connected to the rotating shaft 72 through the compression spring 78; the operating rod 73 is used to drive the sleeve 71 to rotate relative to the rotating shaft 72; the end of the connecting rod group 5 away from the bracket 1 is fixedly connected to the sleeve 71, so that the operator does not need to directly contact the connecting rod group 5, and the connecting rod group 5 can be kept fixed by adjusting the operating rod 73, which is more convenient to operate.

[0039] The present invention adjusts the height of the bracket 1 through the adjustment device 7, specifically as follows: the operator lifts up the operating rod 73 located outside the collector ring chamber, thereby driving the sleeve 71 to rotate relative to the rotating shaft 72, and uses the pressure of the compression spring 78 to maintain the relative rotation between the sleeve 71 and the rotating shaft 72. As the sleeve 71 rotates inward, the connecting rod group 5 located on the sleeve 71 can be driven forward, so that the bracket 1 generates an upward lifting force, so that it always maintains reliable contact with the surface of the collector ring 8, and the collector ring 8 is continuously polished.

[0040] In order to make the fixation of the connecting rod group 5 more stably, in the present embodiment, a fixing ring 77 is further provided on the sleeve 71, and the fixing ring 77 is fixedly connected to the sleeve 71, and the end of the connecting rod group 5 away from the bracket 1 is sleeved in the fixing ring 77, and the fixing ring 77 is provided with a fixing member 76 for fixing the second connecting rod 52. Specifically, the fixing member 76 can be a locking screw or other forms. By sleeveing ​​one end of the second connecting rod 52 in the fixing ring 77, and locking the connecting rod group 5 in the fixing ring 77 by screws, and the fixing ring 77 is fixedly connected to the sleeve 71 (such as welding), the second connecting rod 52 can be stably fixed on the sleeve 71.

[0041] In order to keep the bracket 1 motionless under the collector ring 8, free the operator's hands, and make the rotation of the sleeve 71 more stable, in the present embodiment, the sleeve 71 includes a left sleeve 711 and a right sleeve 712 meshing with each other, and the meshing parts of the left sleeve 711 and the right sleeve 712 are respectively provided with ratchet teeth; the compression spring 78 is arranged in the right sleeve 712, and the operating rod 73 is arranged on the right sleeve 712; the fixing ring 77 is arranged on the left sleeve 711; the adjusting device 7 also includes a clamping plate 74 arranged at the bottom of the end of the support frame 4 away from the bracket 1, and the clamping plate 74 is used to be fixed to the edge of the collector ring chamber 9; the operating rod 73 is provided with a lever spring 75, and the operating rod 73 and the clamping plate 74 are connected by the lever spring 75.

[0042] When the operating rod 73 is lifted upward, the right sleeve 712 can be driven to rotate inward around the rotating shaft 72. Under the action of the compression spring 78 in the right sleeve 712, the left sleeve 711 and the right sleeve 712 are meshed with each other at the ratchet teeth, so that the right sleeve 712 drives the left sleeve 711 to rotate inward by using the ratchet teeth, so that the ratchet teeth on the right sleeve 712 can be stuck in the ratchet teeth on the left sleeve 711, so that the left sleeve 711 and the right sleeve 712 remain relatively fixed under the action of the ratchet teeth, then the second connecting rod 52 can be moved on the left sleeve The bracket 1 is fixed on the tube 711, and because the bracket 1 is fixed on the bottom of the collector ring 8, the bracket 1 can be stably fixed on the bottom of the collector ring 8, and because a lever spring 75 is provided between the operating rod 73 on the right sleeve 712 and the clamp 74, the operating rod 73 can remain fixed. Therefore, after the operator adjusts the position of the bracket 1 at the bottom of the collector ring 8, the grinding material in the bracket 1 can always maintain reliable contact with the collector ring 8 at the bottom of the collector ring 8, and automatic grinding can be achieved without the need for personnel to operate the grinding tool all the time. When the grinding is completed, the second connecting rod 52 is freed from the restraint of the fixing ring 77 by loosening the fixing piece 76, thereby separating the bracket 1 from the collector ring 8, and the grinding tool can be pulled out of the collector ring chamber 9.

[0043] In this embodiment, a fixing rod 3 is also transversely arranged at the front end of the support frame 4, and the two ends of the fixing rod 3 are respectively rotatably connected to the two sides of the support frame 4, and the end of the support rod 2 away from the bracket 1 is hinged to the fixing rod 3, that is, the fixing rod 3 simultaneously penetrates the support frame 4 and the two ends of the support rod 2 and is hinged to the support frame 4 and the support rod 2; a through hole for the fixing rod 3 to penetrate is opened in the middle of the first connecting rod 51, so that the first connecting rod 51 can be rotatably connected to the fixing rod 3. Therefore, when the first connecting rod 51 moves, since the first connecting rod 51 is relatively fixed with the fixing rod 3, under the fixing effect of the fixing rod 3, the movement of the first connecting rod 51 is more stable, and at the same time, the supporting rod 2 can be synchronously driven to move at the same time to lift the bracket 1 upward.

[0044] In this embodiment, a cover plate 6 is provided on the upper surface of the support frame 4, and the cover plate 6 is provided above the second connecting rod 52; the cover plate 6 can protect the support frame 4 and the connecting rod second connecting rod 52, so as to prevent the debris in the collector ring chamber 9 from falling onto the support frame 4 and the second connecting rod 52 during operation, thereby affecting the life of the grinding tool. When the grinding tool of the present invention is working, the grinding material in the bracket 1 can always maintain reliable contact with the collector ring 8 at the bottom of the collector ring 8, without affecting the rotation of the collector ring 8 and without causing any impact on the bracket 1. At this time, the generator of the unit can achieve the purpose of automatically grinding the collector ring 8 under free rotation, thereby avoiding the risks caused by manual grinding.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A collector ring grinding tool, characterized in that: It comprises a bracket for storing grinding materials, the bracket is connected with a fixing device for fixing the bracket to the bottom of the collector ring, and an adjusting device for adjusting the lifting of the fixing device; The fixing device comprises a connecting rod group arranged at the bottom of the bracket, one end of the connecting rod group is hinged to the bottom of the bracket, and the adjusting device is arranged at the other end of the connecting rod group and the adjusting device is used to adjust the lifting and lowering of the connecting rod group; The connecting rod assembly comprises a first connecting rod and a second connecting rod hinged to each other, wherein one end of the first connecting rod away from the hinged end is hinged to the bottom of the bracket, and one end of the second connecting rod away from the hinged end is connected to the adjusting device; The fixing device also includes a support frame arranged below the bracket, one end of the support frame is arranged below the bracket, and the other end of the support frame extends to the outer edge of the collector ring chamber; a plurality of support rods are evenly arranged at the bottom of the bracket, one end of the support rod is hinged to the bottom of the bracket, and the other end of the support rod is hinged to the support frame; the bracket is relatively fixed to the support frame through the support rods; The adjusting device comprises a rotating shaft, a sleeve sleeved on the rotating shaft, and an operating rod fixedly connected to the sleeve; the rotating shaft is fixed to the end of the support frame away from the bracket along the width direction of the support frame; a compression spring is arranged in the inner cavity of the sleeve, and the sleeve is rotatably connected to the rotating shaft through the compression spring; the operating rod is used to drive the sleeve to rotate relative to the rotating shaft; the end of the second connecting rod away from the bracket is fixedly connected to the sleeve; The sleeve is also provided with a fixing ring, the fixing ring is fixedly connected to the sleeve, one end of the second connecting rod away from the bracket is sleeved in the fixing ring, and the fixing ring is provided with a fixing piece for fixing the second connecting rod; The sleeve comprises a left sleeve and a right sleeve meshing with each other, and ratchet teeth are respectively arranged at the meshing positions of the left sleeve and the right sleeve; the compression spring is arranged in the right sleeve, and the operating rod is arranged on the right sleeve; the fixing ring is arranged on the left sleeve; The adjustment device also includes a clamping plate arranged at the bottom of one end of the support frame away from the bracket, and the clamping plate is used to be fixed to the outer edge of the collector ring chamber; a lever spring is arranged on the operating rod, and the operating rod and the clamping plate are connected through the lever spring; A cover plate is arranged on the upper surface of the support frame, and the cover plate is arranged above the second connecting rod.

2. The slip ring grinding tool according to claim 1, characterized in that: The number of support rods is four, and the four support rods are evenly distributed at the bottom of the bracket.

3. The slip ring grinding tool according to claim 1, characterized in that: A fixing rod is arranged at the front end of the support frame along the width direction of the support frame, and the two ends of the fixing rod are rotatably connected to the two side edges of the support frame respectively, and the end of the support rod away from the bracket is hinged to the fixing rod; a through hole for the fixing rod to pass through is opened in the middle part of the first connecting rod, so that the first connecting rod can be rotatably connected to the fixing rod.

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