Wind power variable pitch bearing bolt fastening structure

Abstract

The utility model relates to the technical field of wind power variable pitch bearing installation, in particular to a bolt fastening structure of a wind power variable pitch bearing. The wind power variable pitch bearing bolt fastening structure comprises a hydraulic torque wrench, and the left side and the right side of the hydraulic torque wrench are each provided with a set of guide rails. According to the hydraulic torque wrench, the distance between the two sets of limiting rods can be adjusted according to the distance between the inner side and the outer side of the wind power pitch bearing, so that the two sets of limiting rods abut against the inner side and the outer side of the wind power pitch bearing respectively; the two limiting rods can replace arms of workers to bear the torque of the hydraulic torque wrench, friction force between the limiting rods and the wind power variable-pitch bearing can be improved through the anti-skid sleeves, and therefore the placing stability of the hydraulic torque wrench is improved, meanwhile, hard friction between the limiting rods and the wind power variable-pitch bearing can be prevented, and the service life of the hydraulic torque wrench is prolonged. Therefore, the surface of the wind power variable pitch bearing can be protected.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine pitch bearing installation technology, specifically a wind turbine pitch bearing bolt fastening structure. Background Technology

[0002] Pitch bearings are crucial components in wind turbine generators, primarily used to control and adjust the rotation angle of the blades to adapt to different wind speeds and power outputs. A pitch bearing typically consists of an internal bearing assembly and an external bearing housing. The internal bearing assembly includes the bearing, bearing housing, and seals, while the external bearing housing is usually connected to the blades.

[0003] Chinese Patent CN220783741U discloses a wind turbine pitch bearing bolt fastening device, including a hydraulic torque wrench and a positioning plate connected to the side wall of the hydraulic torque wrench. The outer side wall of the positioning plate is wrapped with and slidably fitted with a sliding sleeve. A fastening bolt is threadedly connected to the sliding sleeve. When the fastening bolt is screwed, its end can abut against the positioning plate. A positioning insert is also threadedly connected to the sliding sleeve. The positioning insert is parallel to the rotation axis of the hydraulic torque wrench. When using the hydraulic torque wrench to fasten the wind turbine pitch bearing bolts, the adjustable positioning insert can be inserted into other bolt holes on the bearing to provide reverse torque at the same time as the installer. This not only reduces labor intensity but also ensures the stability of the hydraulic torque wrench, which is beneficial to improving the installation efficiency of wind turbine pitch bearings.

[0004] The existing technical solutions described above have the following drawbacks: when the positioning rod is inserted into the outer bearing hole, and then the bolt in the inner bearing hole is tightened using a hydraulic torque wrench, and then the bolt in the outer bearing hole is tightened again using a hydraulic torque wrench, the positioning rod cannot be inserted into the inner bearing hole because the bolt in the inner bearing hole has already been installed. Therefore, the positioning rod cannot assist the hydraulic torque wrench in reducing labor intensity. To address the above situation, a technical innovation is proposed based on the existing wind turbine pitch bearing bolt tightening structure. Utility Model Content

[0005] The purpose of this utility model is to provide a fastening structure for wind turbine pitch bearing bolts to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wind turbine pitch bearing bolt fastening structure, comprising:

[0007] A hydraulic torque wrench has a set of guide rails on both its left and right sides. A set of connecting blocks is provided on opposite sides of each guide rail. The top of each connecting block has an insertion port. A first sliding groove is formed inside the guide rail. A second sliding groove extends through the rear of the first sliding groove. Through holes are uniformly formed through the front of the first sliding groove. A slider is placed inside the first sliding groove. A threaded hole is formed on the front of the slider. A hand-tightening bolt is placed in the through hole and screwed into the threaded hole. A limit rod is provided on the rear of the slider. An anti-slip sleeve is provided around the outer ring of the limit rod. The limit rod is located within the second sliding groove, and the anti-slip sleeve is located on the rear side of the guide rail. A quick-release assembly is placed on the outer side of the guide rail.

[0008] Preferably, the quick-release assembly includes a pull ring, the bottom of which is provided with a spring and a pin, the spring being located on the outer ring of the pin.

[0009] Preferably, the hydraulic torque wrench has a set of connection ports on both the left and right sides, and two sets of countersunk holes are evenly provided on the top of the hydraulic torque wrench.

[0010] Preferably, the countersunk hole is connected to the connection port and corresponds to the insertion port of the connection block.

[0011] Preferably, the connecting block is inserted into the connecting port of the hydraulic torque wrench, the two sets of pull rings are evenly placed on the top of the hydraulic torque wrench, and the spring is fixedly installed in the countersunk hole.

[0012] Preferably, the bottom of the pin passes through the countersunk hole and is inserted into the socket of the connecting block.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention allows for adjustment of the distance between two sets of limiting rods based on the spacing between the inner and outer sides of the wind turbine pitch bearing. The two sets of limiting rods abut against the inner and outer sides of the wind turbine pitch bearing respectively. When a hydraulic torque wrench tightens the bolts of the wind turbine pitch bearing, the two sets of limiting rods can replace the worker's arm to bear the torque of the hydraulic torque wrench, thereby reducing the worker's labor intensity. Furthermore, the anti-slip sleeve increases the friction between the limiting rods and the wind turbine pitch bearing, thus improving the stability of the hydraulic torque wrench and preventing hard friction between the limiting rods and the wind turbine pitch bearing, thereby protecting the surface of the wind turbine pitch bearing.

[0015] By pulling the pull ring upwards, the pin is separated from the connecting block. At this point, the guide rail can be moved outwards and separated from the hydraulic torque wrench. By achieving quick assembly and disassembly between the guide rail and the hydraulic torque wrench, the ease of use of the device can be ensured. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a wind turbine pitch bearing bolt fastening structure according to the present invention;

[0017] Figure 2 This is a front sectional view of a wind turbine pitch bearing bolt fastening structure according to the present invention.

[0018] Figure 3 This is a bottom sectional view of a wind turbine pitch bearing bolt fastening structure according to the present invention.

[0019] Figure 4 This is a schematic diagram of the structure of this utility model when it is used in conjunction with a wind turbine pitch bearing.

[0020] In the diagram: 1. Hydraulic torque wrench; 11. Pull ring; 12. Guide rail; 13. Anti-slip sleeve; 14. Hand-tightening bolt; 15. Limiting rod; 16. Pin; 17. Spring; 18. Connecting block; 19. Slider. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-3A wind turbine pitch bearing bolt fastening structure includes a hydraulic torque wrench 1. A set of guide rails 12 are mounted on both sides of the hydraulic torque wrench 1. A set of connecting blocks 18 are fixedly installed on opposite sides of the two sets of guide rails 12. The top of each connecting block 18 has an insertion port. A first sliding groove is formed inside the guide rail 12. A second sliding groove extends through the rear of the first sliding groove. Through holes are evenly distributed through the front of the first sliding groove. A slider 19 is slidably mounted within the first sliding groove. A threaded hole is formed on the front of the slider 19. A hand-tightening bolt 14 is rotatably mounted within the through hole and screwed into the threaded hole. A limit rod 15 is fixedly mounted on the rear of the slider 19. An anti-slip sleeve 13 is fixedly mounted on the outer ring of the limit rod 15. The limit rod 15 is slidably mounted within the second sliding groove. Rotating the hand-tightening bolt 14 separates it from the slider 19 and the guide rails 12. At this point, the limit rod 15 can be moved to move the slider 19 within the guide rails 12. When the threaded hole on the slider 19... After aligning with the through holes at different positions on the guide rail 12, the hand-tightening bolt 14 can be passed through the through hole and screwed into the threaded hole of the slider 19, thereby adjusting and fixing the position of the slider 19. The anti-slip sleeve 13 is located on the rear side of the guide rail 12. A quick-release assembly is placed on the outer side of the guide rail 12. The quick-release assembly includes a pull ring 11. A spring 17 and a pin 16 are fixedly installed at the bottom of the pull ring 11. The pin 16 can be pulled upward by the pull ring 11. The spring 17 is located on the outer ring of the pin 16. A set of connection ports are opened on both the left and right sides of the hydraulic torque wrench 1. Two sets of countersunk holes are evenly opened on the top of the hydraulic torque wrench 1. The countersunk holes are connected to the connection ports and correspond to the insertion port of the connecting block 18. The connecting block 18 is inserted into the connection port of the hydraulic torque wrench 1. The two sets of pull rings 11 are evenly placed on the top of the hydraulic torque wrench 1. The spring 17 is fixedly installed in the countersunk hole. The bottom of the pin 16 passes through the countersunk hole and is inserted into the insertion port of the connecting block 18.

[0023] Working principle: Please refer to Figures 1-4The hydraulic torque wrench 1 is fitted onto the bolt of the wind turbine pitch bearing. The bolt is pre-tightened using the hydraulic torque wrench 1. Then, the pull ring 11 is pulled upwards, causing the pin 16 to move upwards into the countersunk hole. At this point, the connecting block 18 is inserted into the connecting port, and the pull ring 11 is released. The spring 17, using its own rebound force, inserts the pin 16 of the pull ring 11 into the socket of the connecting block 18, thus fixing the guide rail 12 to the outside of the hydraulic torque wrench 1. The hand-tightening bolt 14 is rotated to separate it from the slider 19 and the guide rail 12. The limit rod 15 can then be moved to move the slider 19 within the guide rail 12. When the threaded hole on the slider 19 aligns with the through holes at different positions on the guide rail 12, the hand-tightening bolt 14 can be passed through the through hole and screwed into the threaded hole of the slider 19. This adjusts and fixes the position of the slider 19. The two sets of limit rods 15 can then be adjusted according to the distance between the inner and outer sides of the wind turbine pitch bearing. The distance between the two sets of limit rods 15 is such that the two sets of limit rods 15 abut against the inner and outer sides of the wind turbine pitch bearing, respectively, thereby fixing the hydraulic torque wrench 1 on the wind turbine pitch bearing. Therefore, when the hydraulic torque wrench 1 tightens the bolts of the wind turbine pitch bearing, the two sets of limit rods 15 can replace the worker's arm to bear the torque of the hydraulic torque wrench 1, thereby reducing the worker's labor intensity. Furthermore, the anti-slip sleeve 13 can increase the friction between the limit rods 15 and the wind turbine pitch bearing, thereby improving the placement stability of the hydraulic torque wrench 1. At the same time, it can also prevent hard friction between the limit rods 15 and the wind turbine pitch bearing, thereby protecting the surface of the wind turbine pitch bearing. By pulling the pull ring 11 upward, the pin 16 is separated from the connecting block 18. At this time, the guide rail 12 can be moved outward and separated from the hydraulic torque wrench 1. By realizing the quick disassembly and assembly between the guide rail 12 and the hydraulic torque wrench 1, the ease of use of the device can be guaranteed.

Claims

1. A wind turbine variable pitch bearing bolt fastening structure, characterized by, Include: Hydraulic torque wrench (1), both sides of the hydraulic torque wrench (1) are placed with a set of guide rails (12), the opposite side of the two sets of guide rails (12) is provided with a set of connecting block (18), the top of the connecting block (18) is provided with a socket, the inside of the guide rail (12) is provided with a first sliding slot, the rear side of the first sliding slot is provided with a second sliding slot, the front side of the first sliding slot is uniformly provided with a through hole, the first sliding slot is provided with a sliding block (19), the front side of the sliding block (19) is provided with a threaded hole, the through hole is provided with a hand bolt (14), the hand bolt (14) is screwed with the threaded hole, the rear side of the sliding block (19) is provided with a limit rod (15), the outer ring of the limit rod (15) is provided with an anti-skid sleeve (13), the limit rod (15) is provided in the second sliding slot, the anti-skid sleeve (13) is located in the rear side of the guide rail (12), the outside of the guide rail (12) is placed with quick release assembly.

2. The wind turbine variable pitch bearing bolt fastening structure according to claim 1, characterized in that: The quick release assembly includes a pull ring (11), the bottom of the pull ring (11) is provided with a spring (17) and a latch (16), the spring (17) is located in the outer ring of the latch (16).

3. The wind turbine variable pitch bearing bolt fastening structure according to claim 2, characterized in that: Both sides of the hydraulic torque wrench (1) are provided with a set of connecting port, the top of the hydraulic torque wrench (1) is uniformly provided with two groups of counterbores.

4. The wind turbine variable pitch bearing bolt fastening structure according to claim 3, characterized in that: The counterbores are communicated with the connecting port, and correspond to the socket of the connecting block (18).

5. The wind turbine variable pitch bearing bolt fastening structure according to claim 4, characterized in that: The connecting block (18) is inserted into the connecting port of the hydraulic torque wrench (1), two sets of pull ring (11) are uniformly placed on the top of the hydraulic torque wrench (1), and the spring (17) is fixedly arranged in the counterbores.

6. The wind turbine variable pitch bearing bolt fastening structure according to claim 5, characterized in that: The bottom of the latch (16) penetrates the counterbores and is inserted into the socket of the connecting block (18).

Images