Replacing device for variable pitch bearing bolt of wind turbine generator

Abstract

The utility model belongs to the field of variable pitch bearings, and particularly relates to a device for replacing bolts of a variable pitch bearing of a wind turbine generator. By arranging the replacing mechanism, after the positioning ring is installed on the surface of the bearing seat, the movable seat is placed on the surface of the positioning ring, the movable seat rotates on the surface of the positioning ring to drive the hydraulic wrench to rotate, and the surface of the fixing block can be clamped into the fixing groove in the rotating process of the hydraulic wrench; the hydraulic wrench and the bolt body are located at the same vertical position, the bolt body can be taken out from the interior of the variable pitch bearing body through the hydraulic wrench, the bolt body replacement efficiency and quality can be improved, errors and risks of manual operation are reduced, and the problem that the variable pitch bearing body usually adopts a traditional manual replacement mode is solved. The problems that manual replacement is high in labor intensity and prone to fatigue, and inaccurate alignment is prone to occurring in the replacement process, so that bolts are damaged, and maintenance of the variable pitch bearing is not facilitated are solved.

Description

Technical Field

[0001] This utility model relates to the field of pitch bearings, specifically a device for replacing the bolts of pitch bearings in wind turbine units. Background Technology

[0002] Pitch bearings are one of the key components in wind turbine generator sets. They are mainly used to adjust the angle of the wind turbine blades to adapt to different wind speeds and directions, thereby optimizing the performance and efficiency of the wind turbine generator.

[0003] Pitch bearings require regular maintenance during use. After long-term operation, wear, cracks, or spalling may occur in the bearing raceways, rolling elements, or cage, leading to increased vibration or functional failure. At the same time, aging, contamination, or insufficient grease can cause bearing overheating and accelerated wear.

[0004] However, in the existing pitch bearing maintenance process, the traditional manual replacement method is usually adopted. Manually replacing large bolts requires operators to apply a lot of force, which is labor-intensive and easy to cause fatigue. In addition, inaccurate alignment is prone to occur during the replacement process, which can lead to bolt damage and is not conducive to the maintenance of pitch bearings. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, the maintenance of pitch bearings typically involves traditional manual replacement. Manually replacing large bolts requires operators to apply significant force, resulting in high labor intensity and fatigue. Furthermore, misalignment during replacement can easily occur, leading to bolt damage and hindering pitch bearing maintenance. This invention proposes a replacement device for pitch bearing bolts in wind turbine units.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a replacement device for the pitch bearing bolt of a wind turbine, including a hub, a connecting seat installed on the left side of the hub, a bearing seat installed on the surface of the hub, a pitch bearing body installed in the inner cavity of the bearing seat, the bearing seat and the pitch bearing body being connected by a bolt body thread, and a replacement mechanism installed on the surface of the bearing seat.

[0007] The replacement mechanism includes a positioning ring, the inner cavity of which is mounted on the surface of the bearing seat. A movable seat is slidably connected to the surface of the positioning ring. A hydraulic wrench is mounted on one side of the movable seat. A fixing groove is formed in the inner cavity of the movable seat. A movable groove is formed in the inner cavity of the positioning ring. A fixing block is slidably connected to the inner cavity of the movable groove. The surface of the fixing block engages with the inner cavity of the fixing groove. There are several fixing blocks, and the positions of the fixing blocks match the positions of the bolt bodies.

[0008] Preferably, the top and bottom of the inner cavity of the positioning ring are provided with positioning grooves, and a positioning block is slidably connected to the inner cavity of the positioning groove. The surface of the positioning block is fixedly connected to the inner side of the movable seat.

[0009] Preferably, a connecting plate is fixedly connected to one side of the fixed block, the surface of the connecting plate is slidably connected to the inner cavity of the movable groove, a guide rod is slidably connected to the inner cavity of the connecting plate, and one side of the guide rod is fixedly connected to the inner cavity of the movable groove.

[0010] Preferably, a second spring is fixedly connected to one side of the connecting plate, one end of the second spring is fixedly connected to the inner cavity of the movable groove, and the inner cavity of the second spring is sleeved on the surface of the guide rod.

[0011] Preferably, a movable groove is provided on one side of the movable seat, and a movable plate is slidably connected to the inner cavity of the movable groove. One side of the movable plate is mounted on the surface of the hydraulic wrench.

[0012] Preferably, a limiting rod is slidably connected to the inner cavity of the movable plate, and the surface of the limiting rod is fixedly connected to the inner cavity of the movable groove.

[0013] Preferably, a first spring is fixedly connected to the top of the movable plate, and one end of the first spring is fixedly connected to the inner cavity of the movable groove.

[0014] The advantages of this utility model are:

[0015] This invention, through the setting of a replacement mechanism, installs a positioning ring on the surface of the bearing housing. After installation, a movable seat is installed on the surface of the positioning ring. The rotation of the movable seat on the surface of the positioning ring drives the hydraulic wrench to rotate. During the rotation of the hydraulic wrench, the surface of the fixing block engages with the fixing groove, so that the hydraulic wrench and the bolt body are in the same vertical position. The bolt body can then be removed from the inside of the pitch bearing body by means of the hydraulic wrench. This improves the efficiency and quality of bolt body replacement, reduces errors and risks associated with manual operation, and solves the problem that pitch bearing bodies are usually replaced manually, which is labor-intensive, easy to get tired, and prone to misalignment during replacement, resulting in bolt damage and hindering pitch bearing maintenance. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the positioning ring of this utility model;

[0019] Figure 3 This utility model Figure 2 A magnified view of a portion of point A in the middle;

[0020] Figure 4 This is a schematic diagram of the structure of the movable seat of this utility model;

[0021] Figure 5 This is a partial connection diagram of the movable seat of this utility model.

[0022] In the diagram: 1. Hub; 2. Bearing housing; 3. Connecting seat; 4. Replacement mechanism; 401. Positioning ring; 402. Hydraulic wrench; 403. Movable seat; 404. Positioning groove; 405. Movable groove; 406. Fixed block; 407. Limiting rod; 408. Positioning block; 409. Moving plate; 410. Moving groove; 411. First spring; 412. Fixed groove; 413. Guide rod; 414. Second spring; 415. Connecting plate; 5. Bolt body; 6. Pitch bearing body. 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 scope of protection of the present utility model.

[0024] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0025] This application discloses a device for replacing the bolts of the pitch bearing in a wind turbine. (Refer to...) Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A replacement device for pitch bearing bolts of a wind turbine includes a hub 1, a connecting seat 3 installed on the left side of the hub 1, a bearing seat 2 installed on the surface of the hub 1, a pitch bearing body 6 installed in the inner cavity of the bearing seat 2, and the bearing seat 2 and the pitch bearing body 6 are threadedly connected by a bolt body 5. The pitch bearing body 6 includes an outer ring and an inner ring. The outer ring of the pitch bearing body 6 is fixedly installed to the inner side of the bearing seat 2, and the inner ring of the pitch bearing body 6 is fixedly installed to the blade. A replacement mechanism 4 is installed on the surface of the bearing seat 2.

[0026] The replacement mechanism 4 includes a positioning ring 401. The inner cavity of the positioning ring 401 is mounted on the surface of the bearing housing 2. The positioning ring 401 and the bearing housing 2 are connected by screws. A movable seat 403 is slidably connected to the surface of the positioning ring 401. The movable seat 403 is C-shaped. A hydraulic wrench 402 is mounted on one side of the movable seat 403. The movable seat 403 includes a handle, a wrench head, and a connecting sleeve. The handle is connected to the movable seat 403 by screws. The handle is rotatably connected to the wrench head. A connecting sleeve is mounted on the output end of the wrench head. The inner cavity of the connecting sleeve is fitted onto the surface of the bolt body 5. The shape of the inner cavity of the connecting sleeve matches the shape of the bolt body 5. The inner cavity of the movable seat 403 has a fixing groove 412, and the inner cavity of the positioning ring 401 has a movable groove 405. The inner cavity of the movable groove 405 is slidably connected to a fixing block 406. The fixing block 406 is generally circular, and the surface of the fixing block 406 engages with the inner cavity of the fixing groove 412. There are several fixing blocks 406, and the position of the fixing blocks 406 matches the position of the bolt body 5. When disassembling the pitch bearing body 6, the positioning ring 401 is first installed on the bearing seat 2 with screws. After the positioning ring 401 is installed, the movable seat 403 can be installed on the surface of the positioning ring 401. After the movable seat 403 is installed, it can be rotated by pushing it. The rotation of the movable seat 403 on the surface of the positioning ring 401 drives the hydraulic wrench 402 to rotate synchronously. At the same time, during the rotation of the hydraulic wrench 402, the surface of the fixing block 406 will engage with the inside of the fixing groove 412, thereby positioning the movable seat 403. This ensures that the hydraulic wrench 402 and the bolt body 5 are in the same vertical position. Continuing with the hydraulic wrench 402, by gripping the handle and moving it downwards, the wrench head moves, which in turn moves the connecting sleeve, placing the connecting sleeve onto the surface of the bolt body 5. After the connecting sleeve is in place, the wrench head is rotated by an external power source, which in turn rotates the connecting sleeve, allowing the bolt body 5 to be removed from the inside of the pitch bearing body 6. The positioning by the movable seat 403 and the fixed block 406 improves the efficiency and quality of bolt body 5 replacement, reducing errors and risks associated with manual operation.

[0027] Reference Figure 2 and Figure 4The positioning ring 401 has positioning grooves 404 at both the top and bottom of its inner cavity. A positioning block 408 is slidably connected to the inner cavity of the positioning groove 404. The shape of the positioning block 408 matches the shape of the inner cavity of the positioning groove 404. The positioning block 408 is made of nylon. Because of its nylon material, the positioning block 408 has a fatigue strength more than 10 times that of ordinary plastics and excellent elastic deformation capability, thus improving the overall service life of the positioning block 408 and reducing the frequency of maintenance. The surface of the positioning block 408 is fixedly connected to the inner side of the movable seat 403. The positioning grooves 404 allow the positioning block 408 to slide within the positioning ring 401. The inner cavity slides, improving the stability of the movable seat 403 when sliding on the surface of the positioning ring 401. At the same time, the two positioning blocks 408 are engaged inside the positioning groove 404, which can fix the position of the movable seat 403 and prevent the movable seat 403 from detaching from the surface of the positioning ring 401 during use. When it is necessary to remove the movable seat 403, pull the movable seat 403 outward. When the movable seat 403 is subjected to the outward pulling force, it will squeeze the positioning block 408 inside the positioning groove 404 and deform it, so that the positioning block 408 can be removed from the inside of the positioning groove 404, and then the movable seat 403 can be removed from the surface of the positioning ring 401.

[0028] Reference Figure 3 and Figure 5 A connecting plate 415 is fixedly connected to one side of the fixed block 406. The surface of the connecting plate 415 is slidably connected to the inner cavity of the movable groove 405. A guide rod 413 is slidably connected to the inner cavity of the connecting plate 415. One side of the guide rod 413 is fixedly connected to the inner cavity of the movable groove 405. The guide rod 413 guides the movement of the connecting plate 415, improves the stability of the connecting plate 415 during movement, prevents the position of the connecting plate 415 from shifting during movement, and facilitates the sliding of the fixed block 406 inside the movable groove 405.

[0029] Reference Figure 3 and Figure 5 A second spring 414 is fixedly connected to one side of the connecting plate 415. One end of the second spring 414 is fixedly connected to the inner cavity of the movable groove 405. The inner cavity of the second spring 414 is sleeved on the surface of the guide rod 413. The position of the connecting plate 415 is supported by the setting of the second spring 414. When the connecting plate 415 is not under force, the second spring 414 can push the connecting plate 415 to reset by restoring its deformation, so that the fixing block 406 can be snapped into the interior of the fixing groove 412.

[0030] Reference Figure 2 and Figure 4A movable groove 410 is provided on one side of the movable seat 403. A movable plate 409 is slidably connected to the inner cavity of the movable groove 410. One side of the movable plate 409 is installed on the surface of the hydraulic wrench 402. By setting the movable groove 410, the movable plate 409 can slide inside the movable seat 403, thereby improving the stability of the hydraulic wrench 402 when it moves and facilitating the sliding of the hydraulic wrench 402 on the surface of the movable seat 403.

[0031] Reference Figure 4 The inner cavity of the moving plate 409 is slidably connected to a limiting rod 407. The surface of the limiting rod 407 is fixedly connected to the inner cavity of the moving groove 410. The limiting rod 407 guides the movement of the moving plate 409, thereby allowing the hydraulic wrench 402 to move vertically and preventing the position of the hydraulic wrench 402 from shifting during movement.

[0032] Reference Figure 4 A first spring 411 is fixedly connected to the top of the movable plate 409. One end of the first spring 411 is fixedly connected to the inner cavity of the movable groove 410. The position of the movable plate 409 is positioned by the first spring 411. When the movable plate 409 is not under force, the first spring 411 restores its deformation and pushes the movable plate 409 to reset, so that the hydraulic wrench 402 can be moved to the top of the bolt body 5, which is convenient for disassembling the bolt body 5.

[0033] Working Principle: When disassembling the pitch bearing body 6, the operator first installs the positioning ring 401 on the surface of the bearing housing 2 with screws. After the positioning ring 401 is installed, the movable seat 403 can be installed on the surface of the positioning ring 401. By engaging the positioning block 408 inside the positioning groove 404, the movable seat 403 can be positioned on the surface of the positioning ring 401. After the movable seat 403 is installed, it can be rotated by pushing it. During the rotation of the movable seat 403, the fixed block 406 will be pushed to retract into the movable groove 405. The rotation of the movable seat 403 on the surface of the positioning ring 401 drives the hydraulic wrench 402 to rotate synchronously. When the fixed block 406 and the fixed groove 412 are at the same horizontal position, since there is no obstruction on the surface of the fixed block 406, the second spring 414 can restore its deformation and push the connecting plate 415 to move. The movement of the connecting plate 415 pushes the fixed block 406 to move, so that the surface of the fixed block 406 can engage with the inside of the fixed groove 412, thus enabling the hydraulic wrench to be adjusted. Positioning the hydraulic wrench 402 ensures it is perpendicular to the bolt body 5. By gripping the handle and moving it downwards, the wrench moves the moving plate 409 downwards within the moving groove 410. During this movement, the moving plate 409 slides on the surface of the limiting rod 407, which guides its vertical movement and prevents the hydraulic wrench 402 from shifting. Moving the handle moves the wrench head, which in turn moves the connecting sleeve, placing it on the bolt body 5. After placement, the wrench head rotates via an external power source, allowing the bolt body 5 to be removed from the pitch bearing body 6. The coordinated positioning of the movable seat 403 and the fixed block 406 improves the efficiency and quality of bolt body 5 replacement, reducing errors and risks associated with manual operation.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A device for replacing a wind turbine generator variable pitch bearing bolt, comprising a hub (1), characterized in that: A connecting seat (3) is installed on the left side of the hub (1), a bearing seat (2) is installed on the surface of the hub (1), a pitch bearing body (6) is installed in the inner cavity of the bearing seat (2), the bearing seat (2) and the pitch bearing body (6) are connected by a bolt body (5) threaded connection, and a replacement mechanism (4) is installed on the surface of the bearing seat (2). The replacement mechanism (4) includes a positioning ring (401), the inner cavity of which is mounted on the surface of the bearing seat (2). A movable seat (403) is slidably connected to the surface of the positioning ring (401). A hydraulic wrench (402) is mounted on one side of the movable seat (403). A fixing groove (412) is provided in the inner cavity of the movable seat (403). A movable groove (405) is provided in the inner cavity of the positioning ring (401). A fixing block (406) is slidably connected to the inner cavity of the movable groove (405). The surface of the fixing block (406) engages with the inner cavity of the fixing groove (412). There are several fixing blocks (406), and the position of the fixing blocks (406) matches the position of the bolt body (5).

2. A device for replacing a bolt of a pitch bearing of a wind turbine generator according to claim 1, characterized in that: The top and bottom of the inner cavity of the positioning ring (401) are provided with positioning grooves (404), and the inner cavity of the positioning groove (404) is slidably connected with a positioning block (408). The surface of the positioning block (408) is fixedly connected to the inner side of the movable seat (403).

3. A device for replacing a bolt of a pitch bearing of a wind turbine generator set according to claim 1, characterized in that: A connecting plate (415) is fixedly connected to one side of the fixed block (406). The surface of the connecting plate (415) is slidably connected to the inner cavity of the movable groove (405). A guide rod (413) is slidably connected to the inner cavity of the connecting plate (415). One side of the guide rod (413) is fixedly connected to the inner cavity of the movable groove (405).

4. A device for replacing a blade pitch bearing bolt of a wind turbine generator set according to claim 3, characterized in that: A second spring (414) is fixedly connected to one side of the connecting plate (415). One end of the second spring (414) is fixedly connected to the inner cavity of the movable groove (405). The inner cavity of the second spring (414) is sleeved on the surface of the guide rod (413).

5. A device for replacing a blade pitch bearing bolt of a wind turbine generator set according to claim 1, characterized in that: The movable seat (403) has a movable groove (410) on one side, and a movable plate (409) is slidably connected to the inner cavity of the movable groove (410). One side of the movable plate (409) is mounted on the surface of the hydraulic wrench (402).

6. A device for replacing a blade pitch bearing bolt of a wind turbine generator unit according to claim 5, characterized in that: The inner cavity of the movable plate (409) is slidably connected to a limiting rod (407), and the surface of the limiting rod (407) is fixedly connected to the inner cavity of the movable groove (410).

7. A device for replacing a blade pitch bearing bolt of a wind turbine generator set according to claim 5, characterized in that: A first spring (411) is fixedly connected to the top of the movable plate (409), and one end of the first spring (411) is fixedly connected to the inner cavity of the movable groove (410).

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