Tool for maintaining moment of fixed bolt of yaw gearbox of wind generating set

Abstract

The utility model provides a torque maintenance tool for a fixing bolt of a yaw gearbox of a wind generating set. The torque maintenance tool for the fixing bolt of the yaw gearbox of the wind generating set comprises a connecting rod, a screwing sleeve and a lengthening rod. According to the torque maintenance tool for the yaw gearbox fixing bolt of the wind generating set, the connecting rod is arranged, the screwing sleeve is detachably installed at one end of the connecting rod, the lengthening rod is fixedly installed at the other end of the connecting rod, and the connector used for being connected with the torque wrench is installed at the end, away from the connecting rod, of the lengthening rod; the screwing sleeve and the lengthening rod are located on the two sides of the connecting rod. During use, the screwing sleeve can be extended to a bolt below the gear box, and the extension bar is positioned on the outer side of the gear box. An operator can install the torque wrench on the lengthening rod and drive the lengthening rod to move, and therefore the operation of tightening the bolt is achieved. The operation is convenient, and the operation of tightening and maintaining the bolt in a small space can be met.

Description

Technical Field

[0001] This utility model belongs to the technical field of generator maintenance tools, specifically relating to a torque maintenance tool for the fixing bolts of the yaw gearbox of a wind turbine generator set. Background Technology

[0002] During the operation of large direct-drive wind turbine generators, the yaw gear of the turbine operates continuously to ensure that the turbine is always facing the wind, causing the nacelle to yaw. Over time, due to operation and turbine vibration, the fixing bolts of the yaw gearbox may loosen. This necessitates regular maintenance of these bolts. However, the small size of the direct-drive wind turbine nacelle, the proximity of the yaw gearbox to the nacelle edge, and the gearbox's inherent design make torque maintenance extremely difficult. Some fixing bolts are located at the bottom of the gearbox, and due to space constraints, ordinary torque rods and sleeves cannot be placed at these bolt locations. This makes on-site maintenance inconvenient, preventing the proper maintenance of all fixing bolts. Over time, this inadequate torque maintenance can damage the yaw gearbox, severely impacting the safe and stable operation of the wind turbine. Utility Model Content

[0003] This utility model provides a tool for maintaining the torque of the fixing bolts of the yaw gearbox of a wind turbine generator set, which aims to solve the problem that the fixing bolts of the yaw gearbox of a wind turbine generator set are inconvenient to maintain on-site due to the limitation of the bolt installation position.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a tool for maintaining the torque of the fixing bolts of the yaw gearbox of a wind turbine generator set, comprising:

[0005] Connecting rod;

[0006] A tightening sleeve is detachably installed at one end of the connecting rod. The axis of the tightening sleeve is set at an angle to the connecting rod. The end of the tightening sleeve away from the connecting rod is provided with an anti-rotation hole for fitting onto the outside of the bolt.

[0007] An extension rod is fixedly installed at the end of the connecting rod away from the tightening sleeve. The length direction of the extension rod is parallel to the axis of the tightening sleeve at intervals, and the extension rod extends in a direction away from the anti-rotation hole. The end of the extension rod is provided with a connector for connecting a torque wrench.

[0008] In one possible implementation, a sleeve for installing the tightening sleeve is fixedly installed at the end of the connecting rod. The sleeve has a mounting hole with a polygonal cross-section. A connector that slides with the mounting hole is fixedly installed at the end of the tightening sleeve. A limiting component for limiting the connector inside the sleeve is also provided between the connector and the sleeve.

[0009] In one possible implementation, the limiting component includes:

[0010] A guide post is installed on the mating head and protrudes from the mating head; the end of the sleeve is provided with a guide hole that slides with the guide post.

[0011] A limiting pin is provided to penetrate the guide post radially and slide on the guide post. The limiting pin is used to overlap the end of the sleeve to prevent the guide post from sliding out of the guide hole.

[0012] In one possible implementation, the end of the sleeve is provided with an arcuate groove for receiving the limiting pin, and the two ends of the arcuate groove are provided with limiting platforms for limiting the limiting pin from sliding out of the arcuate groove.

[0013] In one possible implementation, the guide post is slidably disposed on the mating head along the axial direction of the mating joint.

[0014] In one possible implementation, a magnet is fixedly mounted on the bottom of the tightening sleeve to attract the guide post and move it toward the tightening sleeve.

[0015] In one possible implementation, the connecting rod includes a sleeve for connecting the tightening sleeve and an adjusting rod for connecting the extension rod. The adjusting rod is mounted on the sleeve, and the position of the adjusting rod on the sleeve has a degree of freedom to be adjusted along the axial direction of the sleeve.

[0016] In one possible implementation, the adjusting rod is threadedly connected to the sleeve, and the adjusting rod is also threadedly connected to a fastener for abutting against the end of the sleeve.

[0017] The solution shown in this application, compared with the prior art, incorporates a connecting rod with a detachable tightening sleeve at one end. The tightening sleeve is angled to the connecting rod, and an anti-rotation hole with a cross-section adapted to the bolt's shape is provided at the end of the tightening sleeve furthest from the connecting sleeve. An extension rod is fixedly installed at the other end of the connecting rod, with a connector for connecting a torque wrench at the end furthest from the connecting rod. The connector is a hexagonal prism or a tube with a hexagonal hole. When the tightening sleeve is installed on the connecting rod, its axis is parallel to the axis of the extension rod, and the tightening sleeve and extension rod are located on opposite sides of the connecting rod. In use, the tightening sleeve can be extended to the bolt below the gearbox, with the extension rod positioned outside the gearbox. The operator can tighten the bolt by attaching a torque wrench to the extension rod and moving it. This method is convenient and suitable for tightening and maintaining bolts in confined spaces. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of the tool for maintaining the torque of the fixing bolts of the yaw gearbox of a wind turbine generator set provided in this embodiment of the utility model;

[0019] Figure 2 An exploded view of the screw-on sleeve mounting structure provided in this embodiment of the utility model;

[0020] Figure 3 A schematic diagram of the connecting rod provided in an embodiment of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Connecting rod; 11. Sleeve; 12. Adjusting rod; 13. Fastener; 2. Tightening sleeve; 21. Connecting joint; 3. Extension rod; 4. Sleeve; 41. Arc groove; 5. Limiting assembly; 51. Guide post; 52. Limiting pin; 6. Magnet. Detailed Implementation

[0023] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] Please refer to the following: Figures 1 to 3This invention provides a tool for maintaining the torque of the yaw gearbox fixing bolts in a wind turbine generator set. The tool includes a connecting rod 1, a tightening sleeve 2, and an extension rod 3. The tightening sleeve 2 is detachably installed at one end of the connecting rod 1, with its axis forming an angle with the connecting rod 1. The end of the tightening sleeve 2 away from the connecting rod 1 has an anti-rotation hole for fitting onto the outside of the bolt. The extension rod 3 is fixedly installed at the end of the connecting rod 1 away from the tightening sleeve 2. The length direction of the extension rod 3 is parallel to the axis of the tightening sleeve 2 at intervals, and the extension rod 3 extends away from the anti-rotation hole. The end of the extension rod 3 has a connector for connecting a torque wrench.

[0025] The torque maintenance tool for the yaw gearbox fixing bolts of the wind turbine generator provided in this embodiment, compared with the prior art, features a connecting rod 1. A tightening sleeve 2 is detachably installed at one end of the connecting rod 1, with the tightening sleeve 2 at an angle to the connecting rod 1. An anti-rotation hole is provided at the end of the tightening sleeve 2 away from the connecting sleeve, and the cross-section of the anti-rotation hole is a regular hexagonal structure adapted to the shape of the bolt. An extension rod 3 is fixedly installed at the other end of the connecting rod 1, and a connector for connecting a torque wrench is installed at the end of the extension rod 3 away from the connecting rod 1. The connector is a regular hexagonal prism or a tube with a regular hexagonal hole. When the tightening sleeve 2 is installed on the connecting rod 1, the axis of the tightening sleeve 2 is parallel to the axis of the extension rod 3, and the tightening sleeve 2 and the extension rod 3 are located on opposite sides of the connecting rod 1. In use, the tightening sleeve 2 can be extended to the bolt below the gearbox, and the extension rod 3 can be positioned on the outside of the gearbox. The operator can tighten the bolts by attaching a torque wrench to the extension rod 3 and moving the extension rod 3. This is convenient and suitable for tightening and maintaining bolts in confined spaces.

[0026] Specifically, in this embodiment, the tightening sleeve 2 is detachably installed on the connecting rod 1, and different specifications of tightening sleeve 2 can be replaced according to the size of the bolts on site.

[0027] In some embodiments, the tightening sleeve 2 may be adopted as follows: Figure 2 , Figure 3 The structure shown. See also... Figure 2 , Figure 3A sleeve 4 for installing a tightening sleeve 2 is fixedly installed at the end of the connecting rod 1. The sleeve 4 has a polygonal mounting hole. A connector 21 that slides into the mounting hole is fixedly installed at the end of the tightening sleeve 2. A limiting component 5 is provided between the connector 21 and the sleeve 4 to limit the connector 21 inside the sleeve 4. The sleeve 4 has a regular hexagonal mounting hole inside. The connector 21 has a regular hexagonal cross-section and slides inside the mounting hole. When the connector 21 is installed into the mounting hole, the limiting component 5 can limit the connector 21 inside the mounting hole, thus realizing the installation of the tightening sleeve 2. The structure is simple and the operation is convenient.

[0028] In some embodiments, the limiting component 5 may be adopted as follows: Figure 2 The structure shown. See also Figure 2 The limiting assembly 5 includes a guide post 51 and a limiting pin 52. The guide post 51 is mounted on the connector 21 and protrudes from the connector 21. The end of the sleeve 4 has a guide hole that slides with the guide post 51. The limiting pin 52 is arranged radially through the guide post 51 and slidably mounted on the guide post 51. The limiting pin 52 is used to overlap the end of the sleeve 4 to prevent the guide post 51 from sliding out of the guide hole. One end of the guide post 51 protrudes from the end of the connector 21 away from the tightening sleeve 2. The limiting pin 52 is installed on the protruding part of the guide post 51. A guide hole for installing the limiting pin 52 is provided on the guide post 51. The guide hole is arranged radially along the guide post 51, and the limiting pin 52 is inserted into the guide hole. When the connector 21 is installed inside the sleeve 4, the guide post 51 passes through the guide hole and the limiting pin 52 is inserted into the guide hole, so that the limiting pin 52 abuts against the end of the sleeve 4, thereby preventing the connector 21 from sliding out of the mounting hole. The structure is simple and easy to tighten and install the sleeve 2.

[0029] In some embodiments, the sleeve 4 may be adopted as follows: Figure 2 The structure shown. See also Figure 2 The sleeve 4 has an arc-shaped groove 41 at its end for accommodating the limiting pin 52, and limiting platforms at both ends of the arc-shaped groove 41 for limiting the limiting pin 52 to slide out of the arc-shaped groove 41. An end plate is fixedly installed at the end of the sleeve 4, with a guide hole located on the end plate, and an arc-shaped groove 41 recessed on the end face of the end plate. The inner wall of the arc-shaped groove 41 is adapted to the shape of the limiting pin 52. When the limiting pin 52 is inserted into the guide post 51, the limiting pin 52 is located inside the arc-shaped groove 41, which can position and guide the limiting pin 52.

[0030] Specifically, in this embodiment, limiting platforms are provided at both ends of the arc groove 41. By setting the limiting platforms, when the limiting pin 52 is located inside the arc groove 41, the limiting pin 52 can be prevented from sliding out of the arc groove 41, thus ensuring the stability of the connection between the tightening sleeve 2 and the sleeve 4.

[0031] In some embodiments, the guide post 51 may be adopted as follows: Figure 3 The structure shown. See also Figure 3 The guide post 51 is slidably mounted on the connector 21 along its axial direction. One end of the guide post 51 protrudes from the connector 21. A sliding part is fixedly mounted on the other end of the guide post 51, the outer diameter of which is larger than that of the guide post 51. The sliding part is slidably mounted inside the connector 21, and its sliding position limits the guide post 51 from sliding out of the connector 21, thus ensuring the stability of the connection between the guide post 51 and the connector 21. When installing the limiting pin 52, the guide post 51 can be pulled out of the connector 21, facilitating the installation or removal of the limiting pin 52 from the guide post 51. This also facilitates the installation and removal of the tightening sleeve 2.

[0032] In some embodiments, the tightening sleeve 2 may be adopted as follows: Figure 3 The structure shown. See also Figure 3 A magnet 6 is fixedly installed at the bottom of the tightening sleeve 2 to attract the guide post 51 and move it closer to the tightening sleeve 2. The magnet 6 is installed at the bottom of the anti-rotation hole. The guide post 51 is made of a material that can be attracted by the magnet 6. Under the force of the magnet 6, the guide post 51 moves closer to the tightening sleeve 2, thereby keeping the limiting pin 52 located on the guide post 51 inside the arc groove 41, ensuring the stability of the tightening sleeve 2 installed on the sleeve 4. When it is necessary to remove the limiting pin 52, the guide post 51 can be pulled outwards to remove the limiting pin 52 from inside the guide post 51.

[0033] Specifically, in this embodiment, both ends of the limiting pin 52 are provided with chamfers to facilitate sliding into the guide hole.

[0034] In some embodiments, the connecting rod 1 described above may be as follows: Figure 1 , Figure 3 The structure shown. See also... Figure 1 , Figure 3The connecting rod 1 includes a sleeve 11 for connecting the tightening sleeve 2 and an adjusting rod 12 for connecting the extension rod 3. The adjusting rod 12 is mounted on the sleeve 11, and its position on the sleeve 11 has a degree of freedom for adjustment along the axis of the sleeve 11. The connecting rod 1 includes the extension rod 3 and the adjusting rod 12 connected to each other. The distance between the tightening sleeve 2 and the extension rod 3 is adjusted by adjusting the lengths of the extension rod 3 and the adjusting rod 12. This allows the overall length of the connecting rod 1 to be adjusted according to the on-site construction conditions to suit different working environments.

[0035] In some embodiments, the connecting rod 1 described above may be as follows: Figure 3 The structure shown. See also Figure 3 The adjusting rod 12 is threadedly connected to the sleeve 11, and a fastener 13 for abutting against the end of the sleeve 11 is also threadedly connected to the adjusting rod 12. A threaded hole is provided at the end of the sleeve 11, and an external thread is provided on the adjusting rod 12 for threaded connection with the sleeve 11. The position of the adjusting rod 12 on the sleeve 11 can be adjusted by rotating the adjusting rod 12, and the sleeve 11 and the adjusting rod 12 are fixed together by the fastener 13. The structure is simple and the operation is convenient.

[0036] Preferably, in this embodiment, a sliding part is provided at the end of the adjusting rod 12, which is slidably disposed inside the sleeve 11, and a threaded part is provided in the middle of the adjusting rod 12, which is threadedly connected to the threaded hole at the end of the sleeve 11. The sliding part enhances the connection strength between the adjusting rod 12 and the sleeve 11.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tool for maintaining the torque of the fixing bolts of the yaw gearbox of a wind turbine generator set, characterized in that, include: Connecting rod (1); A tightening sleeve (2) is detachably installed at one end of the connecting rod (1). The axis of the tightening sleeve (2) is set at an angle to the connecting rod (1). The end of the tightening sleeve (2) away from the connecting rod (1) is provided with an anti-rotation hole for fitting onto the outside of the bolt. An extension rod (3) is fixedly installed at one end of the connecting rod (1) away from the tightening sleeve (2). The length direction of the extension rod (3) is parallel to the axis of the tightening sleeve (2) at intervals, and the extension rod (3) extends in a direction away from the anti-rotation hole. The end of the extension rod (3) is provided with a connector for connecting a torque wrench.

2. The tool for maintaining the torque of the yaw gearbox fixing bolts of a wind turbine generator set as described in claim 1, characterized in that, The end of the connecting rod (1) is fixedly installed with a sleeve (4) for installing the tightening sleeve (2). The sleeve (4) is provided with a mounting hole with a polygonal cross-section. The end of the tightening sleeve (2) is fixedly installed with a connector (21) that slides with the mounting hole. A limiting component (5) is also provided between the connector (21) and the sleeve (4) for limiting the connector (21) inside the sleeve (4).

3. The tool for maintaining the torque of the yaw gearbox fixing bolts of a wind turbine generator set as described in claim 2, characterized in that, The limiting component (5) includes: A guide post (51) is installed on the connector (21) and protrudes from the connector (21). The end of the sleeve (4) is provided with a guide hole that slides with the guide post (51). A limiting pin (52) is provided to penetrate the guide post (51) radially and is slidably disposed on the guide post (51). The limiting pin (52) is used to overlap the end of the sleeve (4) to prevent the guide post (51) from sliding out of the guide hole.

4. The tool for maintaining the torque of the yaw gearbox fixing bolts of a wind turbine generator set as described in claim 3, characterized in that, The end of the sleeve (4) is provided with an arc-shaped groove (41) for accommodating the limiting pin (52), and the two ends of the arc-shaped groove (41) are provided with limiting platforms for limiting the limiting pin (52) from sliding out of the arc-shaped groove (41).

5. The tool for maintaining the torque of the yaw gearbox fixing bolts of a wind turbine generator set as described in claim 4, characterized in that, The guide post (51) is slidably disposed on the connector (21) along the axial direction of the connector (21).

6. The tool for maintaining the torque of the yaw gearbox fixing bolts of a wind turbine generator set as described in claim 5, characterized in that, The bottom of the tightening sleeve (2) is fixedly equipped with a magnet (6) for attracting the guide post (51) to move closer to the tightening sleeve (2).

7. The tool for maintaining the torque of the yaw gearbox fixing bolts of a wind turbine generator set as described in claim 1, characterized in that, The connecting rod (1) includes a sleeve (11) for connecting the tightening sleeve (2) and an adjusting rod (12) for connecting the extension rod (3). The adjusting rod (12) is mounted on the sleeve (11), and the position of the adjusting rod (12) on the sleeve (11) has a degree of freedom to be adjusted along the axis of the sleeve (11).

8. The tool for maintaining the torque of the yaw gearbox fixing bolts of a wind turbine generator set as described in claim 7, characterized in that, The adjusting rod (12) is threadedly connected to the sleeve (11), and the adjusting rod (12) is also threadedly connected to a fastener (13) for abutting against the end of the sleeve (11).

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