Drawing tool for wind power doubly-fed generator bearing replacement

Abstract

The utility model relates to the field of generator bearing dismounting tools, and discloses a drawing tool for replacing a wind power doubly-fed generator bearing, which comprises a base plate, a base is arranged at the center of the front end face of the base plate, four grooves are arranged on the front end face of the base plate close to the edge in a rectangular manner, the interiors of the four grooves are all rotatably connected with support rods, and the support rods are rotatably connected with the base plate. Four storage grooves are formed in the positions, close to the edge, of the front end face of the base in a rectangular mode, springs are arranged in the four storage grooves correspondingly, the other ends of the four springs are fixedly connected to the positions, close to the rear portions of the centers of the inner side walls, of four supporting rods correspondingly, and clamping blocks are arranged at the positions, close to the front portions of the centers of the inner side walls, of the four supporting rods correspondingly. Threaded grooves are formed in the centers of the front end faces of the four supporting rods. According to the utility model, the four clamping blocks are clamped on the end cover, so that the end cover can be conveniently drawn, and then the four connecting pieces are plugged into the mounting holes to be connected with the mounting holes, so that parts with the mounting holes can be conveniently drawn.

Description

Technical Field

[0001] The utility model relates to the field of generator bearing disassembly tools, in particular to a drawing tool for replacing a wind power double-fed generator bearing. Background Art

[0002] The wind power doubly-fed generator is a core component of a variable speed constant frequency wind turbine generator set. It has important applications in the field of wind power generation. During the long-term use of the wind power doubly-fed generator, the bearings need to be removed for maintenance and replacement. During the replacement process, a series of tools are required for disassembly.

[0003] In the existing process of replacing the bearings of a wind power doubly-fed generator, the end cover and the bearing need to be disassembled. The current disassembly method is to remove the bolts and then knock the end cover and the bearing, which can easily cause damage to the end cover. Therefore, the technical personnel in this field provide a pulling tool for replacing the bearings of a wind power doubly-fed generator to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, and a pulling tool for replacing the bearing of a wind power doubly fed generator is proposed. After disassembling the fan cable, encoder, slip ring box and brush holder, the slip ring is rotated to be removed, and then after heating with an alcohol torch, four second threaded columns are inserted into the mounting hole of the oil retaining ring, and the first nut is rotated. The first nut moves forward along the second threaded column, pushing multiple first push rods to move forward, and then the multiple first push rods are used to squeeze the rear ends of multiple first limit blocks to tilt up, so that the multiple first limit blocks fit into the holes on the oil retaining ring, and the hydraulic cylinder is controlled to extend. The hydraulic cylinder pushes the base to move, and the oil retaining ring is taken out, which is convenient for disassembling the structure with the mounting hole, and the four blocks are clamped on the end cover. The tension of the four springs pulls the four support rods inward, and then pulls them backward again, which is convenient for removing the end cover.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a drawing tool for replacing the bearing of a wind power doubly-fed generator, comprising a base plate, a base is provided at the center of the front end surface of the base plate, four grooves are arranged in a rectangular shape near the edge of the front end surface of the base plate, support rods are rotatably connected inside the four grooves, four storage grooves are arranged in a rectangular shape near the edge of the front end surface of the base, springs are provided inside the four storage grooves, the other ends of the four springs are respectively fixedly connected to the rear of the center of the inner side wall of the four support rods, the four support rods are provided with a block at the front of the center of the inner side wall, the four support rods are provided with a threaded groove at the center of the front end surface of the four support rods, connecting pieces are provided inside the four threaded grooves, and a hydraulic cylinder is provided at the center of the front end surface of the base;

[0006] Through the above technical solution, four clamping blocks are clamped on the end cover, which is convenient for pulling out the end cover. Then, four connecting pieces are inserted into the installation holes and connected to the installation holes, which is convenient for pulling out the parts with installation holes. At the same time, the four connecting pieces can connect installation holes with different apertures, improving the flexibility of equipment use. The setting of four springs is convenient for pulling the four support rods inward, increasing the connection between the four clamping blocks and the end cover, and also facilitating the gathering of the ends of the four support rods, which is convenient for carrying.

[0007] Further, the connecting piece includes a base, two first threaded posts, a first nut, a first bearing, a second threaded post, a plurality of first chutes, a plurality of first push rods and a plurality of first limit blocks. The two first threaded posts are respectively arranged at the centers of the front and rear end faces of the base. The second threaded post is arranged at the center of the front end face of the first threaded post at the front. The plurality of first chutes are arranged in a circular pattern on the outer wall of the second threaded post at the front. The plurality of first limit blocks are respectively rotatably connected to the front of the plurality of first chutes. The first nut is threadedly sleeved on the outer wall of the second threaded post at the rear. The first bearing is arranged on the front end face of the first nut. The plurality of first push rods are respectively arranged on the front end faces of the inner rings of the first bearings in the plurality of first chutes;

[0008] Through the above technical solution, by rotating the first nut, the first nut rotates forward along the second threaded post, driving the first bearing to move forward, thereby pushing the plurality of first push rods to move forward, squeezing the rear ends of the plurality of second limit blocks to tilt up, and clamping on the inner wall of the installation hole, which is convenient for connection with the installation hole and convenient for pulling.

[0009] Further, a third threaded post is arranged at the center of the rear end face of the first threaded post at the rear. A plurality of second chutes are arranged in a circular pattern on the outer wall of the third threaded post at the rear. The rear parts of the plurality of second chutes are respectively rotatably connected with second limit blocks. A second nut is threadedly sleeved on the outer wall of the third threaded post at the front. The rear end face of the second nut is fixedly connected with a second bearing. Second push rods are fixedly connected to the rear end faces of the inner rings of the second bearings in the plurality of second chutes. The diameter of the third threaded post is smaller than that of the second threaded post;

[0010] Through the above technical solution, by rotating the second nut, the second nut rotates backward along the third threaded post, driving the second bearing to move backward, thereby pushing the plurality of second push rods to move backward, squeezing the front ends of the plurality of second limit blocks to tilt up, and clamping on the inner wall of the installation hole, which is convenient for connection with the installation hole and convenient for pulling.

[0011] Further, the four clamping blocks are respectively fixedly connected to one side wall of the four support rods by screws;

[0012] Through the above technical solution, it is convenient to replace the damaged clamping blocks by removing the four screws.

[0013] Furthermore, a handle is provided at the center of the rear end face of the substrate;

[0014] Through the above technical solution, it is convenient to pull through the handle to remove the parts.

[0015] Furthermore, the four support rods are all bent rods;

[0016] Through the above technical solution, the arrangement of the four springs facilitates pulling the four support rods inward, facilitating the aggregation of the ends of the four support rods together and facilitating carrying.

[0017] The utility model has the following beneficial effects:

[0018] 1. In the utility model, after removing the fan cable, encoder, slip ring box and brush holder with the pulling tool for replacing the bearings of the wind power doubly-fed generator, rotate to remove the slip ring, and then use an alcohol blowtorch to heat it. After that, insert the four second threaded posts into the mounting holes of the oil baffle ring, rotate the first nut, and the first nut moves forward along the second threaded post, pushing the multiple first push rods forward. Then, through the multiple first push rods, the rear ends of the multiple first limit blocks are squeezed to tilt upwards, so that the multiple first limit blocks fit into the holes on the oil baffle ring. Control the extension of the hydraulic cylinder, and the hydraulic cylinder pushes the base to move, taking out the oil baffle ring, which is convenient for disassembling the structure with mounting holes.

[0019] 2. In the utility model, by clamping the four blocks on the end cover, the tension of the four springs pulls the four support rods inward, and then pulling backward again, it is convenient to remove the end cover. Then, turn the end cover over, align the screwdriver with the bearing, and use a rubber hammer to strike, taking out the damaged bearing, reducing the overall frequency of knocking during disassembly and reducing the damage to the equipment.

[0020] 3. In the utility model, by further rotating the base, taking out the third threaded post in the threaded groove, inserting the second threaded post into the threaded groove, and threadedly connecting the first threaded post in the threaded groove, using the third threaded post with a diameter smaller than that of the second threaded post for disassembly, it is convenient to disassemble according to the mounting holes with different diameters, improving the flexibility of equipment use. Description of the Drawings

[0021] Figure 1 is a perspective view of a pulling tool for replacing the bearings of a wind power doubly-fed generator proposed by the utility model;

[0022] Figure 2 is a side sectional view of a pulling tool for replacing the bearings of a wind power doubly-fed generator proposed by the utility model;

[0023] Figure 3A three-dimensional view of a pulling tool connecting piece for replacing the bearing of a wind power double-fed generator proposed by the present utility model;

[0024] Figure 4 A side cross-sectional view of a pulling tool connecting piece for replacing the bearing of a wind power double-fed generator proposed by the present utility model.

[0025] Legend:

[0026] 1. Substrate; 2. Groove; 3. Connecting piece; 301. Base; 302. First threaded column; 303. First nut; 304. First bearing; 305. Second threaded column; 306. First chute; 307. First push rod; 308. First limiting block; 309. Second nut; 310. Second bearing; 311. Second chute; 312. Second push rod; 313. Second limiting block; 314. Third threaded column; 4. Clamping block; 5. Storage groove; 6. Support rod; 7. Spring; 8. Base; 9. Handle; 10. Threaded groove; 11. Hydraulic cylinder. Specific implementation mode

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] Refer to Figures 1-4 , an embodiment provided by the present utility model: A pulling tool for replacing the bearing of a wind power double-fed generator, including a substrate 1. A base 8 is provided at the center of the front end face of the substrate 1. Four grooves 2 are arranged in a rectangular array at the edge of the front end face of the substrate 1. Four support rods 6 are rotatably connected inside the four grooves 2. Four storage grooves 5 are arranged in a rectangular array at the edge of the front end face of the base 8. Four springs 7 are arranged inside the four storage grooves 5. The other ends of the four springs 7 are respectively fixedly connected to the centers of the inner side walls of the four support rods 6 at the rear. Clamping blocks 4 are arranged at the centers of the inner side walls of the four support rods 6 at the front. By clamping the four clamping blocks 4 on the end cover, it is convenient to pull the end cover. The arrangement of the four springs 7 is convenient to pull the four support rods 6 inward, increasing the connection between the four clamping blocks 4 and the end cover, and also convenient for the ends of the four support rods 6 to gather, which is convenient for carrying. Threaded grooves 10 are arranged at the centers of the front end faces of the four support rods 6. Connecting pieces 3 are arranged inside the four threaded grooves 10. Then, the four connecting pieces 3 are inserted into the installation holes and connected with the installation holes, which is convenient for pulling the parts with installation holes. At the same time, the four connecting pieces 3 can connect installation holes with different apertures, improving the flexibility of the equipment. A hydraulic cylinder 11 is provided at the center of the front end face of the base 8.

[0029] The connecting member 3 includes a base 301, two first threaded posts 302, a first nut 303, a first bearing 304, a second threaded post 305, a plurality of first chutes 306, a plurality of first push rods 307 and a plurality of first limiting blocks 308. The two first threaded posts 302 are respectively arranged at the centers of the front and rear end faces of the base 301. The second threaded post 305 is arranged at the center of the front end face of the first threaded post 302 at the front. The plurality of first chutes 306 are arranged in a circular pattern on the outer wall of the second threaded post 305 at the front. The plurality of first limiting blocks 308 are respectively rotatably connected to the inner sides of the plurality of first chutes 306 at the front. The first nut 303 is threadedly sleeved on the outer wall of the second threaded post 305 at the rear. The first bearing 304 is arranged on the front end face of the first nut 303. The plurality of first push rods 307 are respectively arranged on the front end faces of the inner rings of the first bearings 304 in the plurality of first chutes 306. By rotating the first nut 303, the first nut 303 rotates forward along the second threaded post 305, driving the first bearing 304 to move forward, thereby pushing the plurality of first push rods 307 to move forward, squeezing the rear ends of the plurality of second limiting blocks 313 to tilt up, clamping on the inner wall of the mounting hole, facilitating connection with the mounting hole and facilitating pulling.

[0030] A third threaded post 314 is provided at the center of the rear end face of the first threaded post 302 at the rear. A plurality of second chutes 311 are arranged in a circular pattern on the outer wall of the third threaded post 314 at the rear. The plurality of second limiting blocks 313 are respectively rotatably connected to the inner sides of the plurality of second chutes 311 at the rear. A second nut 309 is threadedly sleeved on the outer wall of the third threaded post 314 at the front. The rear end face of the second nut 309 is fixedly connected to a second bearing 310. The plurality of second push rods 312 are fixedly connected to the rear end faces of the inner rings of the second bearings 310 in the plurality of second chutes 311. The diameter of the third threaded post 314 is smaller than that of the second threaded post 305. By rotating the second nut 309, the second nut 309 rotates backward along the third threaded post 314, driving the second bearing 310 to move backward, thereby pushing the plurality of second push rods 312 to move backward, squeezing the front ends of the plurality of second limiting blocks 313 to tilt up, clamping on the inner wall of the mounting hole, facilitating connection with the mounting hole and facilitating pulling.

[0031] Four clamping blocks 4 are respectively fixedly connected to one side wall of the four support rods 6 by screws. By removing the four screws, it is convenient to replace the damaged clamping blocks 4. A handle 9 is provided at the center of the rear end face of the substrate 1, facilitating pulling through the handle 9 to remove the parts. The four support rods 6 are all bent rods. The arrangement of the four springs 7 facilitates pulling the four support rods 6 inward, facilitating the ends of the four support rods 6 to converge together and facilitating carrying.

[0032] Working principle: When in use, first remove the fan cable, encoder, slip ring box and brush holder, rotate and remove the slip ring, use a sleeve to store the thread end at the end of the shaft, and then use an alcohol burner to heat it, fit the end of the hydraulic cylinder 11 to the end of the sleeve, insert the four second threaded columns 305 into the mounting hole of the oil retaining ring, rotate the first nut 303, the first nut 303 moves forward along the second threaded column 305, push the multiple first push rods 307 to move forward, and then squeeze the multiple first limit blocks 308 through the multiple first push rods 307. The rear ends are tilted up, so that the multiple first limit blocks The positioning block 308 fits into the hole on the oil retaining ring and controls the hydraulic cylinder 11 to extend. The hydraulic cylinder 11 pushes the base 8 to move and takes out the oil retaining ring, which is convenient for disassembling the structure with the mounting hole. Then, by rotating the base 301, the third threaded column 314 inside the threaded groove 10 is taken out, and the second threaded column 305 is inserted into the threaded groove 10 and connected to the inside of the threaded groove 10 through the first threaded column thread 302. The third threaded column 314 with a diameter smaller than the second threaded column 305 is used for disassembly, which is convenient for disassembly according to mounting holes of different diameters and improves the flexibility of equipment use.

[0033] By clamping the four blocks 4 on the end cover, the tension of the four springs 7 pulls the four support rods 6 inward, and then pulls them backward again to facilitate the removal of the end cover. Then turn the end cover over, use a screwdriver to aim at the bearing, and use a rubber hammer to hit it to remove the damaged bearing, thereby reducing the frequency of overall disassembly and knocking, and reducing damage to the equipment.

[0034] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A drawing tool for replacing a bearing of a wind power doubly-fed generator, comprising a base plate (1), characterized in that: A base (8) is provided at the center of the front end surface of the substrate (1); four grooves (2) are arranged in a rectangular shape near the edge of the front end surface of the substrate (1); support rods (6) are rotatably connected inside the four grooves (2); four storage grooves (5) are arranged in a rectangular shape near the edge of the front end surface of the base (8); springs (7) are provided inside the four storage grooves (5); the other ends of the four springs (7) are respectively fixedly connected to the rear center of the inner side wall of the four support rods (6); blocks (4) are provided at the front center of the inner side wall of the four support rods (6); thread grooves (10) are provided at the center of the front end surface of the four support rods (6); connecting pieces (3) are provided inside the four thread grooves (10); and a hydraulic cylinder (11) is provided at the center of the front end surface of the base (8).

2. A drawing tool for replacing a wind power double-fed generator bearing according to claim 1, characterized in that: The connecting member (3) comprises a base (301), two first threaded columns (302), a first nut (303), a first bearing (304), a second threaded column (305), a plurality of first slide grooves (306), a plurality of first push rods (307) and a plurality of first limit blocks (308), wherein the two first threaded columns (302) are respectively arranged at the center of the front and rear end surfaces of the base (301), the second threaded column (305) is arranged at the center of the front end surface of the first threaded column (302) at the front, and the plurality of first slide grooves are arranged at the center of the front and rear end surfaces of the first threaded column (302). (306) are arranged in a circular shape at the front of the outer wall of the second threaded column (305), and the plurality of first limit blocks (308) are respectively rotatably connected to the front of the inner part of the plurality of first slide grooves (306). The first nut (303) is threadedly sleeved on the rear of the outer wall of the second threaded column (305). The first bearing (304) is arranged on the front end surface of the first nut (303), and the plurality of first push rods (307) are respectively arranged on the front end surface of the inner ring of the first bearing (304) inside the plurality of first slide grooves (306).

3. A drawing tool for replacing a wind power double-fed generator bearing according to claim 2, characterized in that: A third threaded column (314) is provided at the center of the rear end face of the first threaded column (302) at the rear, and a plurality of second slide grooves (311) are arranged in a circular shape at the rear of the outer wall of the third threaded column (314), and a second limit block (313) is rotatably connected inside the plurality of second slide grooves (311) at the rear, and a second nut (309) is threadedly sleeved at the front of the outer wall of the third threaded column (314), and a second bearing (310) is fixedly connected to the rear end face of the second nut (309), and a second push rod (312) is fixedly connected to the rear end face of the inner ring of the second bearing (310) inside the plurality of second slide grooves (311), and the diameter of the third threaded column (314) is smaller than that of the second threaded column (305).

4. A drawing tool for replacing a wind power double-fed generator bearing according to claim 1, characterized in that: The four clamping blocks (4) are respectively fixedly connected to one side wall of the four support rods (6) by means of screws.

5. The drawing tool for replacing the bearing of a wind power doubly-fed generator according to claim 1, characterized in that: A handle (9) is provided at the center of the rear end surface of the base plate (1).

6. A drawing tool for replacing a wind power double-fed generator bearing according to claim 1, characterized in that: The four support rods (6) are all bent rods.

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