Polishing device for carbon brush of generator

Abstract

The utility model provides a generator carbon brush polishing device, and relates to the field of carbon brush polishing, the generator carbon brush polishing device comprises a support, the middle part of the support is provided with a circular motion polishing part, the middle part of the polishing part is provided with a rotating shaft, and the rotating shaft is rotatably connected to the support. The distance from the edge of the polishing part to the center of the rotating shaft is the same as the radius of the corresponding generator large shaft, fixing frames are fixedly installed above the two sides, parallel to the rotating shaft, of the support, and the carbon brushes are fixed into the fixing frames through bolts. According to the generator carbon brush polishing device, the polishing part is arranged to do the circular shaft motion with the same radius as the large shaft of the generator, so that the carbon brush can be polished with the corresponding radian, and the polished carbon brush can be better attached to the large shaft.

Description

Technical Field

[0001] This utility model relates to the field of carbon brush polishing technology, specifically a generator carbon brush polishing device. Background Technology

[0002] In recent years, there have been numerous instances of generator unit outages caused by burnt-out generator excitation carbon brushes. The main cause of these accidents is poor contact between some carbon brushes and slip rings, leading to increased contact resistance, sparking, overheating, and rapid escalation, ultimately resulting in slip ring burnout. This has caused significant economic losses.

[0003] CN220217889U describes an electric grinding device for generator carbon brushes, comprising a fixed base plate, a mounting frame fixedly connected to one side of the top of the fixed base plate, a fixing block fixedly connected to one side of the top of the mounting frame, a mounting plate fixedly connected to the middle of one side of the fixing block, three placement frames fixedly connected to the middle of both sides of the mounting plate, and a connecting sleeve box fixedly connected to the middle of one side of each of the six placement frames. This technical solution, through the arrangement of the mounting frame, fixing block, mounting plate, placement frames, connecting sleeve box, hydraulic cylinder, telescopic bracket, and clamping plate, allows for the simultaneous grinding of six carbon brushes by evenly placing three placement frames on both sides of the mounting plate. The output end of the hydraulic cylinder drives the telescopic bracket to adjust its length, causing the telescopic bracket to push the clamping plate forward, thus facilitating the clamping plate to hold the carbon brushes on the inner wall of the placement frames, achieving the effect of a mechanical clamping device for carbon brushes. However, this technical solution can only grind down the protruding parts of the carbon brushes; a more precise fit is achieved when the contact surface of the carbon brush is arc-shaped. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a generator carbon brush grinding device, which solves the problem of non-adhesive carbon brush grinding mentioned in the background art.

[0005] Technical solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a generator carbon brush grinding device, comprising a bracket, a grinding part with circular motion is provided in the middle of the bracket, a rotating shaft is provided in the middle of the grinding part, the rotating shaft is rotatably connected to the bracket, the distance from the edge of the grinding part to the center of the rotating shaft is the same as the radius of the corresponding generator shaft, a fixing frame is fixedly installed above the bracket on both sides parallel to the rotating shaft, the carbon brush is fixed inside the fixing frame by bolts, and the center line of the carbon brush is perpendicular to the center line of the rotating shaft.

[0007] Furthermore, the grinding part is a roller, the outer surface of which is covered with sandpaper, and the distance from the outer surface of the sandpaper to the rotating shaft is the same as the radius of the corresponding generator shaft.

[0008] Furthermore, the rotating shaft includes a square shaft portion in the middle and round shaft portions at both ends. The roller is engaged with the outer surface of the square shaft portion, and a retaining shaft is provided in the round shaft portion to limit the sliding of the roller.

[0009] Furthermore, the outer ring of the roller is provided with a groove, which slopes from the middle to both sides.

[0010] Furthermore, the grinding part includes a sleeve, and the outer surface of the sleeve is provided with a telescopic rod that can adjust the telescopic length. A grinding column parallel to the rotation axis is fixedly installed at the free end of the telescopic rod. Sliding limit rods are fixedly installed on both sides of the sleeve located on the telescopic rod, and the free ends of the sliding limit rods are fixedly connected to the grinding column.

[0011] Furthermore, the outer surface of the sleeve is fixedly equipped with a plurality of telescopic rods with adjustable telescopic lengths.

[0012] Furthermore, a collection box for collecting toner is provided below the grinding section of the bracket.

[0013] Furthermore, a baffle is slidably connected to the end of the fixing frame away from the rotation axis, and the baffle on the same side slides as a whole, with the bolts for fixing the carbon brush located above the fixing frame.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. This generator carbon brush grinding device, by setting the grinding part to make circular shaft movement with the same radius as the generator shaft, can grind the carbon brush with the corresponding arc, so that the ground carbon brush fits the shaft better.

[0016] 2. This generator carbon brush grinding device includes a grinding section comprising a sleeve. The outer surface of the sleeve is provided with a telescopic rod with an adjustable telescopic length. A grinding column parallel to the rotating shaft is fixedly installed at the free end of the telescopic rod. Sliding limit rods are fixedly installed on both sides of the sleeve at the telescopic rod. The free ends of the sliding limit rods are fixedly connected to the grinding column. By rotating the telescopic rod, the distance from the outer ring of the grinding column to the center of the rotating shaft can be adjusted, thereby adapting to the grinding of carbon brushes corresponding to generators of different diameters. This design allows for relatively simple adjustment.

[0017] 3. The generator carbon brush polishing device has a groove on the outer ring of the roller. The groove is inclined from the middle to both sides. The roller is polished with sandpaper. Carbon powder is generated during the roller's upward rotation polishing process. The groove can temporarily store the carbon powder and discharge it from the roller by inclining to both sides. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the bracket connection of this utility model;

[0020] Figure 3 This is a schematic diagram of the baffle connection of this utility model;

[0021] Figure 4 This is a schematic diagram of the connection of the grinding column of this utility model.

[0022] The components are as follows: 1. Support; 2. Grinding section; 3. Rotating shaft; 4. Fixing frame; 201. Roller; 202. Sandpaper; 204. Groove; 205. Sleeve; 206. Telescopic rod; 207. Grinding column; 208. Sliding limit rod; 209. Insert shaft; 5. Baffle; 6. Collection box. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] See Figures 1-4 A generator carbon brush grinding device includes a bracket 1, a grinding part 2 with circular motion in the middle of the bracket 1, and a rotating shaft 3 in the middle of the grinding part 2. The rotating shaft 3 is connected to a manual rotating handle or to a motor through a transmission mechanism. The rotating shaft 3 is rotatably connected to the bracket 1. The distance from the edge of the grinding part 2 to the center of the rotating shaft 3 is the same as the radius of the corresponding generator shaft. The shaft refers to the rotating part of the generator and the part that contacts the carbon brush, which is generally a slip ring. A fixing frame 4 is fixedly installed on both sides of the bracket 1 parallel to the upper side of the rotating shaft 3. The carbon brush is fixed inside the fixing frame 4 by bolts. The center line of the carbon brush is perpendicular to the center line of the rotating shaft 3. This arrangement allows the grinding part 2 to perform circular motion with the same radius as the generator shaft, thereby grinding the carbon brush with the corresponding arc, so that the ground carbon brush fits the shaft better.

[0025] The grinding section 2 is a roller 201. The outer surface of the roller 201 is covered with sandpaper 202. The distance from the outer surface of the sandpaper 202 to the rotating shaft 3 is the same as the radius of the corresponding generator shaft. By setting a roller 201 with sandpaper 202 of fixed diameter for grinding, the arc grinding can be performed more accurately.

[0026] The rotating shaft 3 includes a square shaft part in the middle and round shaft parts at both ends. The roller 201 is snapped onto the outer surface of the square shaft part, and the round shaft part is provided with a limiting shaft 209 to restrict the sliding of the roller 201. This setting makes it easy to replace rollers 201 of different diameters, so as to adapt to carbon brush grinding for different needs.

[0027] The outer ring of the roller 201 is provided with a groove 204. The groove 204 is inclined from the middle to both sides. The roller 201 is polished by sandpaper 202. During the polishing process of the roller 201 rotating from bottom to top, carbon powder is generated. The groove 204 can temporarily store the carbon powder and discharge the carbon powder from the roller 201 by tilting to both sides.

[0028] In one embodiment, the grinding part 2 includes a sleeve 205. The outer surface of the sleeve 205 is provided with a telescopic rod 206 with an adjustable telescopic length. A grinding column 207 parallel to the rotating shaft 3 is fixedly installed at the free end of the telescopic rod 206. Sliding limit rods 208 are fixedly installed on both sides of the sleeve 205 located on the telescopic rod 206. The free end of the sliding limit rod 208 is fixedly connected to the grinding column 207. By rotating the telescopic rod 206, the distance from the outer ring of the grinding column 207 to the center of the rotating shaft 3 can be adjusted, thereby adapting to the grinding of carbon brushes corresponding to generators of different diameters. This setting allows for relatively simple adjustment.

[0029] Multiple adjustable telescopic rods 206 are fixedly installed in a ring on the outer surface of the sleeve 205. By distributing multiple sets in a ring, multiple grinding operations can be performed within one rotation cycle, thereby improving grinding efficiency.

[0030] The support 1 is located below the grinding section 2 and has a collection box 6 for collecting toner. The collection box 6 can collect the toner that is ground and can be recycled.

[0031] A baffle 5 is slidably connected to the end of the fixed frame 4 away from the rotating shaft 3. The baffle 5 is provided with a limiting shaft that is slidably connected to the fixed frame 4, and a threaded shaft that is threadedly connected to the fixed frame 4. The threaded shaft and the baffle 5 are rotatably engaged. The position of the baffle 5 can be adjusted by rotating the threaded shaft. By determining the number of rotations of the threaded shaft, the baffles 5 on both sides can be kept symmetrical about the axis of the rotating shaft 3. The baffles 5 on the same side slide as a whole. The bolts that fix the carbon brush are located above the fixed frame 4. When the carbon brush wears a certain length, the position of the baffle 5 can be adjusted to limit the carbon brush from the end away from the friction end, thereby adjusting the position of the carbon brush as a whole. After grinding, the carbon brushes can be of the same length and can be arbitrarily replaced.

[0032] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A generator carbon brush polishing device, comprising a bracket (1), characterized in that: The bracket (1) is provided with a grinding part (2) that moves in a circular motion in the middle. A rotating shaft (3) is provided in the middle of the grinding part (2). The rotating shaft (3) is rotatably connected to the bracket (1). The distance from the edge of the grinding part (2) to the center of the rotating shaft (3) is the same as the radius of the corresponding generator shaft. The bracket (1) is fixedly installed above both sides of the rotating shaft (3) with a fixed frame (4). The carbon brush is fixed inside the fixed frame (4) by bolts, and the center line of the carbon brush is perpendicular to the center line of the rotating shaft (3).

2. The generator carbon brush polishing device according to claim 1, characterized in that: The grinding part (2) is a roller (201), and the outer surface of the roller (201) is covered with sandpaper (202). The distance from the outer surface of the sandpaper (202) to the rotating shaft (3) is the same as the radius of the corresponding generator shaft.

3. The generator carbon brush polishing device according to claim 2, characterized in that: The rotating shaft (3) includes a square shaft portion in the middle and round shaft portions at both ends. The roller (201) is engaged with the outer surface of the square shaft portion, and a limiting shaft (209) is provided on the round shaft portion to allow the roller (201) to slide.

4. The generator carbon brush polishing device according to claim 3, characterized in that: The outer ring of the roller (201) is provided with a groove (204), which is inclined from the middle to both sides.

5. The generator carbon brush polishing device according to claim 1, characterized in that: The grinding part (2) includes a sleeve (205). The outer surface of the sleeve (205) is provided with a telescopic rod (206) with adjustable telescopic length. A grinding column (207) parallel to the rotating shaft (3) is fixedly installed at the free end of the telescopic rod (206). Sliding limit rods (208) are fixedly installed on both sides of the sleeve (205) located on the telescopic rod (206). The free end of the sliding limit rod (208) is fixedly connected to the grinding column (207).

6. The generator carbon brush polishing device according to claim 5, characterized in that: The outer surface of the sleeve (205) is fixedly equipped with a plurality of telescopic rods (206) with adjustable telescopic length.

7. The generator carbon brush polishing device according to any one of claims 1-6, characterized in that: The bracket (1) is located below the grinding section (2) and has a collection box (6) for collecting toner.

8. The generator carbon brush polishing device according to claim 7, characterized in that: The fixed frame (4) is slidably connected to a baffle (5) at the end away from the rotating shaft (3). The baffle (5) on the same side slides as a whole, and the bolt for fixing the carbon brush is located above the fixed frame.

Images