Power generator carbon brush polishing device

Abstract

The invention relates to the technical field of carbon brush polishing equipment, in particular to a generator carbon brush polishing device which comprises a base, a curved surface polisher and a carbon brush clamping and moving assembly which are adjacent to each other are arranged on the base, the carbon brush clamping and moving assembly comprises a sliding rail arranged on the base, and a carbon brush clamping assembly is arranged on the sliding rail. The carbon brush clamping assembly can move along the sliding rail. And the curved surface polisher is fixedly connected with the base, the polishing cambered surface of the curved surface polisher is adjustable and faces the carbon brush clamping and moving assembly, and the radial direction of the polishing cambered surface is perpendicular to the sliding rail. The whole device is firm in structural connection and easy and convenient to operate, the carbon brush polishing efficiency and quality can be remarkably improved, and the actual polishing use requirement of the generator carbon brush is fully met.

Description

Technical Field

[0001] This invention relates to the field of carbon brush polishing equipment, and in particular to a generator carbon brush polishing device. Background Technology

[0002] Steam turbine generators are an indispensable part of the power system, playing a crucial role in the power generation process. Currently, large steam turbine generators typically employ static excitation, using carbon brushes and slip rings to introduce current and drive the rotor to rotate, generating electrical energy. However, during operation, high-speed friction occurs between the carbon brushes and slip rings, making timely replacement of the carbon brushes a critical task in routine maintenance.

[0003] When the carbon brushes of generators in thermal power plants reach the replacement standard, they need to be replaced with new ones. The surface of the new carbon brush is flat. Currently, most of the time, workers manually grind the ellipticity of the carbon brush according to the type of brush to be replaced before replacing it. However, during manual grinding, it is necessary to observe and compare the ellipticity of the original carbon brush from time to time and adjust the angle and force. It is difficult to keep the ellipticity of the ground carbon brush completely consistent with that of the original carbon brush, and the time cost is relatively long.

[0004] Therefore, a new generator carbon brush polishing device is needed. Summary of the Invention

[0005] The purpose of this invention is to provide a generator carbon brush polishing device that can solve the problems of mismatched polishing arc, low efficiency, and poor consistency mentioned in the background art.

[0006] The present invention provides a generator carbon brush polishing device, including a base, on which adjacent curved surface polishers and a carbon brush clamping and moving assembly are provided. The carbon brush clamping and moving assembly includes a slide rail disposed on the base, and a carbon brush clamping assembly is disposed on the slide rail. The carbon brush clamping assembly can be displaced along the slide rail. The curved surface grinder is fixedly connected to the base. The grinding arc surface of the curved surface grinder is adjustable. The grinding arc surface of the curved surface grinder faces the carbon brush clamping moving assembly, and the radial direction of the grinding arc surface is perpendicular to the slide rail.

[0007] Preferably, the curved surface grinder includes a U-shaped bracket, the open side of which is detachably connected to sandpaper, the bottom of which is provided with an arc adjustment mechanism, and the side arm of which is fixedly connected to the base.

[0008] Preferably, each of the two arm ends of the bracket is provided with a top plate parallel to the end face of the side arm, and a clamping plate is provided between the top plate and the side arm. A plurality of clamping springs are provided between the top plate and the clamping plate, and the sandpaper is located between the clamping plate and the top of the side arm.

[0009] Preferably, the arc surface adjustment mechanism includes a support plate and a plurality of adjustment rods. The adjustment rods are threadedly connected to the bottom of the bracket. The support plate is located at the bottom of the sandpaper. The adjustment rods abut against the support plate, and the support plate provides support for the sandpaper.

[0010] Preferably, the support plate is made of nylon, polyoxymethylene or polyurethane.

[0011] Preferably, the carbon brush clamping assembly includes a slider, the bottom of which is slidably connected to the slide rail, and clamping arms are connected to both sides of the top of the slider, forming an adjustable clamping space between the two clamping arms.

[0012] Preferably, the plane containing the clamping arm is perpendicular to the axis of the slide rail.

[0013] Preferably, the clamping arm and the slider are connected by a lead screw, the center of the lead screw is located inside the slider, the two ends of the lead screw have opposite thread directions, the two ends of the lead screw are respectively connected to the clamping arm, and the lead screw is driven to rotate by a transmission device.

[0014] Preferably, the transmission device includes a first bevel gear disposed in the middle of the lead screw, a second bevel gear disposed inside the slider, the second bevel gear meshing with the first bevel gear, and the second bevel gear being perpendicular to the axis of the first bevel gear, the center of the second bevel gear being connected to a rotating shaft, and the rotating shaft passing through the slider being connected to a knob.

[0015] Preferably, the side arm of the bracket is snapped into the base.

[0016] Beneficial effects: The adjustable arc surface design of the curved surface grinder in this invention can flexibly adapt to the grinding arc required by different carbon brushes. The sandpaper adopts a detachable connection method with elastic clamping, which not only ensures the reliability of the fixation, but also makes the installation, replacement and length adjustment of the sandpaper convenient and less likely to damage the sandpaper. The carbon brush clamping component can quickly adjust the clamping distance with the cooperation of bidirectional threaded screw and bevel gear transmission to achieve stable clamping of carbon brushes of different sizes, ensuring a tight fit between the carbon brush to be ground and the grinding arc surface. The smooth displacement of the carbon brush clamping component along the slide rail makes the grinding process uniform and smooth, effectively ensuring the grinding accuracy.

[0017] The overall structure of this invention is firmly connected and easy to operate, which can significantly improve the efficiency and quality of carbon brush polishing and fully meet the actual polishing needs of generator carbon brushes. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a top view of the overall structure of the present invention; Figure 2 This is a schematic front view of the overall structure of the present invention; Figure 3 This is a top view cross-sectional diagram of the bracket of the present invention.

[0020] Explanation of reference numerals in the attached figures: 1-Base, 2-Slide rail, 3-Carbon brush to be ground, 4-Carbon brush clamping assembly, 401-Slider, 402-Clamping arm, 403-Knob, 404-First bevel gear, 405-Second bevel gear, 406-Rotating shaft, 407-Lead screw, 5-Adjusting rod, 6-Bracket, 7-Sandpaper, 8-Pressure plate, 9-Top plate, 10-Connecting plate, 11-Pressure spring, 12-Support plate. Detailed Implementation

[0021] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] Example 1 like Figures 1-3 As shown, a generator carbon brush polishing device includes a base 1, on which an adjacent curved surface polisher and a carbon brush clamping and moving assembly are provided. The curved surface polisher is fixedly connected to the base 1. The carbon brush clamping and moving assembly includes a slide rail 2 provided on the base 1, and a carbon brush clamping assembly 4 is provided on the slide rail 2. The carbon brush clamping assembly 4 can be moved along the slide rail 2. The curved surface grinder includes a U-shaped bracket 6. The open side of the bracket 6 is detachably connected to sandpaper 7. Each of the two arm ends of the bracket 6 has a top plate 9 parallel to the end face of the side arm. The two ends of the top plate 9 are fixedly connected to the end of the side arm via connecting plates 10. A clamping plate 8 is provided between the top plate 9 and the side arm. Several clamping springs 11 are provided between the top and the clamping plate 8, and the clamping springs 11 are in a compressed state. The two ends of the clamping springs 11 are fixedly connected to the clamping plate 8 and the top plate 9 respectively. The sandpaper 7 is located between the clamping plate 8 and the top of the side arm. Under the action of the clamping springs 11, the clamping plate 8 approaches the end of the side arm of the bracket 6, thereby pressing and fixing the sandpaper 7. At the same time, the clamping plate 8 will not damage the sandpaper 7, allowing for quick installation and easy adjustment of the length of the sandpaper 7 between the two arms of the bracket 6. The side arm of the bracket 6 is fixedly connected to the base 1. Preferably, the side arm of the bracket 6 and the base 1 are interlocked to prevent the bracket 6 from shifting during grinding. The two ends of the sandpaper 7 are pressed against the outside of the side arm of the bracket 6, which can fix one end of the sandpaper 7.

[0025] The sandpaper 7 forms a polishing arc surface between the two arms of the support 6. The polishing arc surface of the curved surface grinder is adjustable. The bottom of the support 6 has an arc surface adjustment mechanism, which includes a support plate 12 and several adjusting rods 5. The adjusting rods 5 are threaded to the bottom of the support 6. The support plate 12 is located at the bottom of the sandpaper 7, and its two ends are inserted into the side arms of the support 6. The adjusting rods 5 abut against the support plate 12. The support plate 12 is made of nylon, polyoxymethylene, or polyurethane. The support plate 12 provides surface support for the sandpaper 7 and is flexible, allowing the arc to be adjusted by the adjusting rods 5 to adapt to the polishing requirements of the carbon brush arc.

[0026] The grinding arc surface of the curved surface grinder faces the carbon brush clamping moving assembly, and the radial direction of the grinding arc surface is perpendicular to the slide rail 2.

[0027] The carbon brush clamping assembly 4 includes a slider 401, the bottom of which is slidably connected to the slide rail 2. L-shaped clamping arms 402 are connected to both sides of the top of the slider 401, forming an adjustable clamping space between the two clamping arms 402. The plane of the clamping arms 402 is perpendicular to the axis of the slide rail 2. After the clamping arms 402 clamp the carbon brush, the surface of the carbon brush to be polished is in contact with the sandpaper 7.

[0028] The clamping arms 402 and the slider 401 are connected by a lead screw 407. The center of the lead screw 407 is located inside the slider 401. The threads at both ends of the lead screw 407 are in opposite directions. Both ends of the lead screw 407 are connected to the clamping arms 402 respectively. The lead screw 407 is driven to rotate by a transmission device. The transmission device includes a first bevel gear 404 located in the middle of the lead screw 407. A second bevel gear 405 is located inside the slider 401. The second bevel gear 405 meshes with the first bevel gear 404, and the axes of the second bevel gear 405 and the first bevel gear 404 are perpendicular. The center of the second bevel gear 405 is connected to a rotating shaft 406, which passes through the slider 401 and connects to a knob 403. Rotating the knob 403 will drive the first bevel gear 404 to rotate, which in turn will drive the lead screw 407 to rotate. Under the action of the lead screw 407, the clamping arms 402 at both ends of the slider 401 move away from or closer to each other, adjusting the distance between the clamping arms 402.

[0029] Work process: Before polishing, install the sandpaper 7, push the clamping plate 8 to further compress the clamping spring 11, insert the sandpaper 7 between the clamping plate 8 and the side arm of the bracket 6, and then the clamping plate 8 presses the sandpaper 7 tightly against the top of the side arm under the action of the clamping spring 11. Adjust the length of the sandpaper 7 between the two side arms as needed; then, according to the polishing arc required by the carbon brush, rotate the adjusting rod 5 at the bottom of the bracket 6. The adjusting rod 5 pushes the support plate 12 upward. Because the support plate 12 is flexible and its two ends are inserted into the side arm, it will change its arc with the push of the adjusting rod 5, thereby driving the sandpaper 7 to form a suitable polishing arc surface; bolt the curved surface polisher with the polishing arc surface adjusted to the base 1, and press one end of the sandpaper 7 between the curved surface polisher and the base 1; Next, place the carbon brush 3 to be polished between the two clamping arms 402 of the carbon brush clamping assembly 4, with the surface to be polished close to the sandpaper 7. Turn the knob 403 on the slider 401. The knob 403 drives the rotating shaft 406 and the second bevel gear 405 to rotate. The second bevel gear 405 meshes with the first bevel gear 404 in the middle of the lead screw 407, causing the lead screw 407 to rotate. Since the threads at both ends of the lead screw 407 are opposite, they will drive the clamping arms 402 on both sides to move closer to each other until the carbon brush is clamped and the surface to be polished of the carbon brush is in contact with the polishing arc surface of the sandpaper 7. Then, push the slider 401 to move back and forth on the slide rail 2. The slider 401 drives the carbon brush held in the slide to move synchronously. The carbon brush to be polished is evenly polished by the sandpaper 7 in the relative movement with the polishing arc surface of the sandpaper 7, thus completing the carbon brush polishing operation.

[0030] Example 2 A generator carbon brush polishing device is basically the same in structure as Embodiment 1, except that the connection between the clamping arm 402 and the slider 401 is different. Each clamping arm 402 has a plug rod on the side near the slider 401, which is inserted into the slider 401. A connecting spring is provided between the plug rod and the slider 401, and the connecting spring is in a stretched state.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A generator carbon brush polishing device, characterized in that, Includes a base, on which are provided adjacent curved surface grinders and carbon brush clamping and moving components. The carbon brush clamping and moving components include a slide rail disposed on the base, on which carbon brush clamping components are disposed, and the carbon brush clamping components can be displaced along the slide rail. The curved surface grinder is fixedly connected to the base. The grinding arc surface of the curved surface grinder is adjustable. The grinding arc surface of the curved surface grinder faces the carbon brush clamping moving assembly, and the radial direction of the grinding arc surface is perpendicular to the slide rail.

2. The generator carbon brush polishing device according to claim 1, characterized in that, The curved surface grinder includes a U-shaped bracket, the open side of which is detachably connected to sandpaper, the bottom of which is provided with an arc adjustment mechanism, and the side arm of which is fixedly connected to the base.

3. The generator carbon brush polishing device according to claim 2, characterized in that, The bracket has a top plate at each end of both arms that is parallel to the end face of the side arm. A clamping plate is provided between the top plate and the side arm. Several clamping springs are provided between the top plate and the clamping plate. The sandpaper is located between the clamping plate and the top of the side arm.

4. The generator carbon brush polishing device according to claim 2, characterized in that, The arc surface adjustment mechanism includes a support plate and several adjustment rods. The adjustment rods are threadedly connected to the bottom of the bracket. The support plate is located at the bottom of the sandpaper. The adjustment rods abut against the support plate, and the support plate provides support for the sandpaper.

5. The generator carbon brush polishing device according to claim 4, characterized in that, The support plate is made of nylon, polyoxymethylene or polyurethane.

6. The generator carbon brush polishing device according to claim 1, characterized in that, The carbon brush clamping assembly includes a slider, the bottom of which is slidably connected to the slide rail, and clamping arms connected to both sides of the top of the slider, forming an adjustable clamping space between the two clamping arms.

7. The generator carbon brush polishing device according to claim 6, characterized in that, The plane containing the clamping arm is perpendicular to the axis of the slide rail.

8. The generator carbon brush polishing device according to claim 6, characterized in that, The clamping arm and the slider are connected by a lead screw. The center of the lead screw is located inside the slider. The two ends of the lead screw have opposite thread directions. The two ends of the lead screw are respectively connected to the clamping arm. The lead screw is driven to rotate by a transmission device.

9. The generator carbon brush polishing device according to claim 8, characterized in that, The transmission device includes a first bevel gear disposed in the middle of the lead screw, a second bevel gear disposed inside the slider, the second bevel gear meshing with the first bevel gear, and the second bevel gear being perpendicular to the axis of the first bevel gear, the center of the second bevel gear being connected to a rotating shaft, and the rotating shaft passing through the slider being connected to a knob.

10. The generator carbon brush polishing device according to claim 1, characterized in that, The side arm of the bracket is engaged with the base.

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