A wind turbine gearbox elastic support pin shaft repairing structure
By using a disc spring fixture to axially load and reset the pin in the wind turbine gearbox, the problems of pin creep displacement and backward movement were solved, achieving the effects of simplified operation, improved safety and versatility.
Patent Information
- Application Number
- CN202521473086.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-15
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-07-15
AI Technical Summary
The gearbox pins of wind turbines are prone to creep displacement and backward movement under alternating loads. Existing repair methods require removing the impeller or using jacks, which are complex and risky.
A disc spring fixture is used to reset the pin by axial load. The disc spring compression load drives the pin to reset, and the axial load capacity is increased by the same-direction combination, and the compression stroke is increased by the opposite-direction combination, so as to achieve stable reset of the pin.
It simplifies the pin repair operation, improves safety and work efficiency, reduces the difficulty and risk of operation, and enhances the versatility of disc spring tooling.
Smart Images
Figure CN224680047U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of wind turbine gearbox pins, and in particular to a repair structure for an elastic support pin of a wind turbine gearbox. Background Technology
[0002] The torque arm of the wind turbine gearbox is not perfectly rigid and will deform under load, causing the torque arm pin to tilt at a certain angle relative to the main shaft. At this point, the pressure on both ends of the torque arm pin will decompose, generating a force along the axial direction of the torque arm pin. This force continuously changes with the load on the transmission chain. Simultaneously, the elastic support stiffness at the front and rear of the torque arm will also have some deviation, further affecting the force on the torque arm pin. Under long-term alternating loads, the torque arm pin will experience creep displacement, and due to insufficient interference fit and pin deformation, it may experience backward slippage.
[0003] Since the gearbox is a major component of the transmission chain, connected to the impeller via the main shaft, the impeller's enormous weight creates a cantilever on the main shaft. This causes the pin to shift backward, making repairing the shifted pin after loosening the gearbox's elastic support difficult and risky. Currently, two methods are generally used for restoration: 1. Remove the impeller and main unit, loosen the gearbox's elastic support, and then adjust the pin back into place; 2. Use a jack to push the pin back into its original position. If a method could be implemented without using a jack, without removing the gearbox, and with simpler operation, preventing the pin from shifting backward again, the workload for pin repositioning would be greatly reduced, and the risk significantly lowered. Utility Model Content
[0004] The purpose of this utility model is to address the shortcomings of the existing technology by providing a repair structure for the elastic support pin of a wind turbine gearbox. It adopts a disc spring tooling, and the load after the disc spring is compressed drives the pin to return to its original position. The axial load capacity is improved by the same-direction combination, and the compression stroke is improved by the opposite-direction combination. It can also be combined in combination to simultaneously improve the axial load capacity and stroke to meet the design requirements.
[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows: a wind turbine gearbox elastic support pin repair structure, including a base, a generator, a gearbox, and a main shaft, wherein the generator, gearbox, and main shaft are connected in sequence and mounted on the base. The structure includes an elastic support module and a disc spring fixture. Both sides of the gearbox are supported on the base by the elastic support module, and the disc spring fixture is disposed on one side of the elastic support module. The disc spring fixture includes a fixture baffle, a disc spring, a guide block, a cover plate, an anti-loosening washer, and bolts. The fixture baffle, disc spring, guide block, cover plate, and anti-loosening washer are sequentially disposed on one side of the elastic support module, and the fixture baffle, disc spring, guide block, cover plate, and anti-loosening washer are connected to the elastic support module by bolts.
[0006] Furthermore, the elastic support module includes an elastic support, a pin, a pin spacer, and a bearing bush; two pins pass through both sides of the gearbox, and elastic supports are assembled at both ends of each pin through bearing bushes, and a pin spacer is fitted on each pin.
[0007] Furthermore, the tooling baffle, disc spring, guide block, cover plate, and anti-loosening washer are connected to one end of the pin shaft by bolts.
[0008] Furthermore, the other end of the pin is fitted with the original baffle by bolts.
[0009] Furthermore, the structure includes a hoisting device; the hoisting device is connected to the disc spring fixture and is used to hoist the disc spring fixture.
[0010] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0011] 1. This utility model designs a structure for repairing the backward slippage of the elastic support pin of the gearbox of a three-point shaft system wind turbine generator set, which can improve the safety of operators and enhance their work efficiency.
[0012] 2. This utility model avoids the main structure such as the gearbox torque arm, so that the structural differences of different models of gearboxes have no impact on the disc spring tooling, thus improving the versatility of the disc spring tooling.
[0013] 3. This utility model consists of a tooling baffle, disc spring, guide block, cover plate, anti-loosening washer, and bolts. It is small in size and weight, which reduces the on-site installation space requirements and operation difficulty.
[0014] 4. This utility model consists of a tooling baffle, disc spring, guide block, cover plate, anti-loosening washer, and bolts. It is small in size and weight, can be operated by a single person, and reduces the difficulty of high-altitude operations. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model.
[0016] Figure 2 This is a schematic diagram of the installation structure of the disc spring fixture. Detailed Implementation
[0017] The present invention will be further described below with reference to specific embodiments.
[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0019] See Figures 1 to 2 As shown, the wind turbine gearbox elastic support pin repair structure provided in this embodiment includes a base 1, a generator 2, a gearbox 3, a main shaft 6, an elastic support module 4, and a disc spring fixture 5.
[0020] The generator 2, gearbox 3 and main shaft 6 are connected in sequence. The generator 2, gearbox 3 and main shaft 6 are installed on the base 1. Both sides of the gearbox 3 are supported on the base 1 by elastic support modules 4. The disc spring fixture 5 is set on one side of the elastic support module 4.
[0021] The elastic support module 4 includes an elastic support 10, a pin 12, a pin 12 spacer 11, and a bearing 9. Two pins 12 pass through both sides of the gearbox 3, and each pin 12 has an elastic support 10 mounted on both ends via a bearing 9. A pin 12 spacer 11 is fitted onto each pin 12. The disc spring fixture 5 includes a fixture baffle 13, two disc springs 14, a guide block 15, a cover plate 16, an anti-loosening washer 17, and bolts 7. The fixture baffle 13, two disc springs 14, guide block 15, cover plate 16, and anti-loosening washer 17 are sequentially arranged on one side of the elastic support module 4. The fixture baffle 13, two disc springs 14, guide block 15, cover plate 16, and anti-loosening washer 17 are connected to one end of the pin 12 via bolts 7, and the other end of the pin 12 is fitted with the original baffle 8 via bolts 7.
[0022] Furthermore, a hoisting device and an auxiliary installation device are added. The hoisting device is connected to the disc spring fixture 5 and is used to hoist the disc spring fixture 5. The auxiliary installation device is connected to the bolts 7 of the disc spring fixture 5 to facilitate the locking of the disc spring fixture 5 to the elastic support module 4.
[0023] The installation process of the wind turbine gearbox elastic support pin repair structure provided in this embodiment is as follows:
[0024] Step 1: Use bolts to lock the guide block 15 to the cover plate 16.
[0025] Step 2: Apply molybdenum disulfide lubricant to the contact surfaces between the tooling baffle 13 and the disc spring 14, between the cover plate 16 and the disc spring 14, and between the cover plate 16 and the anti-loosening washer 17.
[0026] Step 3: Apply an appropriate amount of molybdenum disulfide lubricant to bolt 7.
[0027] Step 4: Connect the tooling baffle 13, disc spring 14, guide block 15, cover plate 16, and anti-loosening washer 17 in series with bolts 7, and then lock them with pin 12 and tighten the torque.
[0028] The principle of this utility model is as follows: The disc spring 14 is a special spring that is conical in the axial direction and bears the load. After bearing the load, it generates axial compression. The load after compression of the disc spring 14 drives the pin 12 to return to its original position. The disc spring 14 can improve the axial load capacity through unidirectional combination and improve the compression stroke through opposing combination. It can also be combined in combination, that is, the unidirectional and opposing combination can simultaneously improve the axial load capacity and stroke to meet the design requirements. The disc spring fixture 5 has a simple structure and avoids the main structure such as the gearbox torque arm, so that the structural differences of different models of gearboxes have no impact on the disc spring fixture 5, and it has high versatility. The disc spring 14 is selected with appropriate size and load value according to GB-T1972. Since the diameter of the pin 12 of the gearbox is similar, the disc spring 14 can be used for elastic supports 10 of different models of gearboxes.
[0029] The above-described embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all changes made in accordance with the shape and principle of this utility model should be covered within the protection scope of this utility model.
Claims
1. A repair structure for an elastic support pin of a wind turbine gearbox, comprising a base, a generator, a gearbox, and a main shaft, wherein the generator, gearbox, and main shaft are connected in sequence, and the generator, gearbox, and main shaft are mounted on the base, characterized in that: The gearbox includes an elastic support module and a disc spring fixture. Both sides of the gearbox are supported on the base by the elastic support module, and the disc spring fixture is disposed on one side of the elastic support module. The disc spring fixture includes a fixture baffle, a disc spring, a guide block, a cover plate, an anti-loosening washer, and bolts. The fixture baffle, disc spring, guide block, cover plate, and anti-loosening washer are sequentially disposed on one side of the elastic support module, and the fixture baffle, disc spring, guide block, cover plate, and anti-loosening washer are connected to the elastic support module by bolts.
2. The wind turbine gearbox elastic support pin repair structure according to claim 1, characterized in that: The elastic support module includes an elastic support, a pin, a pin spacer, and a bearing bush; two pins pass through both sides of the gearbox, and elastic supports are assembled at both ends of each pin through bearing bushes, and a pin spacer is fitted on each pin.
3. The wind turbine gearbox elastic support pin repair structure according to claim 2, characterized in that: The tooling baffle, disc spring, guide block, cover plate, and anti-loosening washer are connected to one end of the pin shaft by bolts.
4. The wind turbine gearbox elastic support pin repair structure according to claim 3, characterized in that: The other end of the pin is fitted with the original baffle by bolts.
5. The wind turbine gearbox elastic support pin repair structure according to claim 1, characterized in that: It includes a hoisting device; the hoisting device is connected to the disc spring fixture and is used to hoist the disc spring fixture.