A wind turbine gearbox gear shaft axial positioning device

Abstract

This utility model discloses an axial positioning device for a wind turbine gearbox gear shaft, relating to the field of axial positioning technology. It includes a gearbox body with a gear shaft rotatably connected inside. In this utility model, one side of the thrust ring overlaps with a bearing, and one side of the anti-loosening nut overlaps with a main nut. Rotating the anti-loosening nut causes it to overlap with the main nut. A pin is inserted into the positioning hole. The anti-loosening nut reduces the loosening of the main nut, ensuring a tight fit between the thrust ring, the main nut, and the bearing, reducing the axial movement of the gear shaft during use. This ensures the normal use of the gear shaft and connecting parts. The support effect of the bracket and L-shaped bracket on the gear shaft improves the radial stability of the gear shaft, indirectly ensuring the axial positioning effect. The bracket and support rod share the radial force on the gear bearing, dispersing the load on the gear shaft and extending the component's lifespan.

Description

Technical Field

[0001] This utility model relates to the field of axial positioning technology, and in particular to an axial positioning device for the gear shaft of a wind turbine gearbox. Background Technology

[0002] The gear shaft of a wind turbine gearbox is one of the core transmission components of the wind turbine gearbox. It is a key component connecting the gear and the power transmission system. Its main function is to transmit the torque converted from the wind energy captured by the wind turbine from the first stage of transmission to the next stage of transmission through the cooperation with the gear (such as the gear and shaft being integrally formed, keyed connection, or interference fit, etc.), ultimately achieving an increase in speed.

[0003] In the existing technology, a single locking nut is used to axially position the high-speed shaft, relying on the self-locking of the thread to achieve the positioning and locking effect. When the high-speed shaft is subjected to excessive axial force, the positioning effect is not ideal, and axial movement is prone to occur, leading to the failure of the high-speed shaft and connecting parts. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the prior art that when the high-speed shaft is subjected to excessive axial force, the positioning effect of a single locking nut is not ideal, which easily leads to axial movement and failure of the high-speed shaft and connecting parts. Therefore, an axial positioning device for the gear shaft of a wind turbine gearbox is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an axial positioning device for a wind turbine gearbox gear shaft, comprising a gearbox body, a gear shaft body rotatably connected inside the gearbox body, a positioning mechanism provided on the outer ring surface of the gear shaft body, the positioning mechanism comprising an extension sleeve, an anti-loosening nut and a thrust ring, the extension sleeve being threadedly connected to the gear shaft body, one side of the extension sleeve being fixedly connected to the anti-loosening nut, one side of the anti-loosening nut being fitted with a main nut, the main nut being threadedly connected to the gear shaft body, one side of the main nut being fitted with a thrust ring, the thrust ring being penetrated by the gear shaft body, and one side of the thrust ring being fitted with a bearing, the gear shaft body being inserted through and inserted into the bearing.

[0006] Preferably, both the gear shaft body and the outer ring surface of the extension sleeve are provided with positioning holes, and pins are inserted into the positioning holes.

[0007] Preferably, the outer ring surface of the bearing is engaged with the gearbox body.

[0008] Preferably, two brackets are engaged on one side of the extension sleeve, the two brackets are engaged and connected, and an auxiliary pad is fixedly connected to the inner wall of the bracket, with the inner wall of the auxiliary pad overlapping the gear shaft body.

[0009] Preferably, an L-shaped frame is fixedly connected to the bottom of the bracket, the two L-shaped frames are engaged with each other, one end of the L-shaped frame is inserted into the gearbox body, and a limit pin is inserted at the connection between the L-shaped frame and the gearbox body.

[0010] Preferably, a support rod is inserted into one side of the bracket, and a connecting rod is threaded into the support rod.

[0011] Preferably, the plug rod is threadedly connected to a sleeve rod, and one end of the sleeve rod is fixedly connected to the gearbox body.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, one side of the thrust ring overlaps with the bearing, and one side of the anti-loosening nut overlaps with the main nut. By rotating the anti-loosening nut, one side of the anti-loosening nut overlaps with the main nut. A pin is inserted into the positioning hole. The anti-loosening nut can reduce the loosening of the main nut, ensure the tight fit between the thrust ring and the main nut and the bearing, reduce the axial movement of the gear shaft body during use, and thus ensure the normal use of the gear shaft body and the connecting parts.

[0014] 2. In this utility model, the bottom of the bracket is fixedly connected to the L-shaped frame, and the support rod is inserted into the bracket to lock the two brackets together. The two L-shaped frames are locked together. The bracket moves along the gear shaft body so that the L-shaped frame is inserted into the gearbox body. The connection between the L-shaped frame and the gearbox body can be limited by the limiting pin, which ensures the support effect of the bracket and L-shaped frame on the gear shaft body, improves the radial stability of the gear shaft, and indirectly ensures the axial positioning effect. The bracket and support rod share the radial force on the gear bearing, which can disperse the load on the gear shaft body and thus extend the service life of the component. Attached Figure Description

[0015] Figure 1 This utility model provides a three-dimensional structural schematic diagram of an axial positioning device for a wind turbine gearbox gear shaft;

[0016] Figure 2 This utility model provides a schematic diagram of the connection between the bracket and the L-shaped frame structure of the axial positioning device for the gear shaft of a wind turbine gearbox;

[0017] Figure 3 This utility model provides an installation diagram of the extension sleeve structure of the axial positioning device for the gear shaft of a wind turbine gearbox;

[0018] Figure 4 This utility model provides a schematic diagram of the installation of a thrust ring structure for an axial positioning device for the gear shaft of a wind turbine gearbox.

[0019] Legend: 1. Gearbox body; 2. Gear shaft body; 3. Support rod; 4. Connecting rod; 5. Bracket; 6. L-shaped bracket; 7. Limit pin; 8. Sleeve rod; 9. Auxiliary pad; 10. Extension sleeve; 11. Bearing; 12. Anti-loosening nut; 13. Pin; 14. Positioning hole; 15. Main nut; 16. Thrust ring. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] Example 1: Refer to Figures 1-4 As shown: An axial positioning device for a wind turbine gearbox gear shaft includes a gearbox body 1, a gear shaft body 2 rotatably connected inside the gearbox body 1, and a positioning mechanism provided on the outer ring surface of the gear shaft body 2. The positioning mechanism includes an extension sleeve 10, a lock nut 12, and a thrust ring 16. The extension sleeve 10 is threadedly connected to the gear shaft body 2. One side of the extension sleeve 10 is fixedly connected to the lock nut 12. A main nut 15 is attached to one side of the lock nut 12. The main nut 15 is threadedly connected to the gear shaft body 2. One side of the main nut 15 is attached to the thrust ring 16. The thrust ring 16 is penetrated by the gear shaft body 2, and a bearing 11 is attached to one side of the thrust ring 16. The gear shaft body 2 is inserted through the bearing 11. Positioning holes 14 are provided on the outer ring surfaces of both the gear shaft body 2 and the extension sleeve 10. A pin 13 is inserted into the positioning hole 14. The outer ring surface of the bearing 11 is engaged with the gearbox body 1.

[0023] By utilizing the threaded connection between the main nut 15 and the gear shaft body 2, an axial preload is applied to the thrust ring 16 during tightening. The thrust ring 16 is pushed towards the bearing 11 by the main nut 15 and comes into contact with the inner ring end face of the bearing 11, transmitting the preload to the inner ring of the bearing 11. Ultimately, through the force chain of "main nut 15 → thrust ring 16 → inner ring of bearing 11 → gearbox body 1", the gear shaft body 2 is restricted from axial outward movement. The thrust ring 16, with its large end face area, prevents the main nut 15 from moving axially outward. The force is distributed and transmitted to the inner ring of the bearing 11 to prevent damage to the end face of the inner ring of the bearing 11 due to excessive local force. One side of the anti-loosening nut 12 is tightly fitted with the main nut 15. When the main nut 15 tends to loosen due to vibration, the anti-loosening nut 12 will resist the displacement of the main nut 15 through the friction of the overlapping surface. The pin 13 is inserted into the positioning hole 14 of the gear shaft body 2 and the extension sleeve 10, directly restricting the circumferential rotation of the extension sleeve 10, and thus indirectly restricting the circumferential loosening of the main nut 15 through the anti-loosening nut 12.

[0024] Example 2: Figure 1 and Figure 2As shown, two brackets 5 are engaged on one side of the extension sleeve 10, and the two brackets 5 are engaged and connected. An auxiliary pad 9 is fixedly connected to the inner wall of the bracket 5, and the inner wall of the auxiliary pad 9 overlaps with the gear shaft body 2. An L-shaped frame 6 is fixedly connected to the bottom of the bracket 5, and the two L-shaped frames 6 are engaged and connected. One end of the L-shaped frame 6 is inserted into the gearbox body 1. A limit pin 7 is inserted at the connection between the L-shaped frame 6 and the gearbox body 1. A support rod 3 is inserted into one side of the bracket 5. A plug rod 4 is threadedly connected inside the support rod 3. A sleeve rod 8 is threadedly connected to the plug rod 4. One end of the sleeve rod 8 is fixedly connected to the gearbox body 1.

[0025] The bracket 5 engages with the outer ring of the extension sleeve 10, and the inner wall overlaps with the gear shaft body 2 through an auxiliary pad 9 made of flexible material. This not only does not hinder the rotation of the gear shaft body 2, but also limits the radial runout of the gear shaft body 2 through the elastic constraint of the auxiliary pad 9. One end of the L-shaped frame 6 at the bottom of the bracket 5 is inserted into the gearbox body 1 and fixed by the limiting pin 7, forming a rigid support chain of "bracket 5 → L-shaped frame 6 → gearbox body 1". This transmits the radial force borne by the bracket 5 to the gearbox body 1, preventing the bracket 5 from deforming itself. A support rod 3 is inserted into one side of the bracket 5. The insertion rod 4 inside the support rod 3 is fixedly connected to the gearbox body 1 through the sleeve rod 8, which can improve the radial stability of the gear shaft body 2, indirectly ensure axial positioning, realize radial auxiliary support of the gear shaft body 2, and thus reduce vibration interference.

[0026] The usage and working principle of this device are as follows: First, install the thrust ring 16 on one side of the bearing 11. Then, rotate the main nut 15 so that one side of the main nut 15 fits against the thrust ring 16, making both sides of the thrust ring 16 tightly fit against the bearing 11 and the main nut 15 respectively. Next, rotate the anti-loosening nut 12 outside the gear shaft body 2 so that one side of the anti-loosening nut 12 overlaps with the main nut 15. Then, insert the pin 13 into the positioning hole 14 aligned with the gear shaft body 2 and the extension sleeve 10 to limit the anti-loosening nut 12. Finally, move the two brackets 5 on both sides of the gear shaft body 2 to... When bracket 5 is engaged, the inner wall of auxiliary pad 9 is in contact with the outer ring surface of gear shaft body 2, and the two L-shaped brackets 6 are engaged with each other. Then, the L-shaped bracket 6 is moved to the side of the gearbox body 1 so that the L-shaped bracket 6 is inserted into the gearbox body 1. Then, a limiting pin 7 is installed on one side of the gearbox body 1 so that the end of the limiting pin 7 is inserted into the L-shaped bracket 6 to limit the L-shaped bracket 6. A support rod 3 is inserted into one side of bracket 5. The insertion rod 4 inside the support rod 3 is rotated so that the end of the insertion rod 4 is connected to the sleeve rod 8, thus completing the installation of the entire device. The thread on the outer ring surface of gear shaft body 2 is a Spilock thread.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A wind turbine gearbox gear shaft axial positioning device, comprising a gearbox body (1), a gear shaft body (2) is rotatably connected inside the gearbox body (1), characterized in that: A positioning mechanism is provided on the outer ring surface of the gear shaft body (2). The positioning mechanism includes an extension sleeve (10), a lock nut (12), and a thrust ring (16). The extension sleeve (10) is threadedly connected to the gear shaft body (2). One side of the extension sleeve (10) is fixedly connected to the lock nut (12). One side of the lock nut (12) is fitted with a main nut (15). The main nut (15) is threadedly connected to the gear shaft body (2). One side of the main nut (15) is fitted with the thrust ring (16). The thrust ring (16) is penetrated by the gear shaft body (2), and one side of the thrust ring (16) is fitted with a bearing (11). The gear shaft body (2) is inserted through the bearing (11).

2. The wind turbine gearbox gear shaft axial positioning device of claim 1, wherein: The gear shaft body (2) and the outer ring surface of the extension sleeve (10) are both provided with positioning holes (14), and a pin (13) is inserted into the positioning hole (14).

3. The wind turbine gearbox gear shaft axial positioning device of claim 1, wherein: The outer ring surface of the bearing (11) is engaged with the gearbox body (1).

4. The wind turbine gearbox gear shaft axial positioning device of claim 1, wherein: The extension sleeve (10) has two brackets (5) engaged on one side, and the two brackets (5) are engaged and connected. An auxiliary pad (9) is fixedly connected to the inner wall of the bracket (5), and the inner wall of the auxiliary pad (9) overlaps with the gear shaft body (2).

5. A wind turbine gearbox gear shaft axial positioning device according to claim 4, characterised in that: The bracket (5) is fixedly connected to an L-shaped frame (6) at its bottom. The two L-shaped frames (6) are engaged and connected, and one end of the L-shaped frame (6) is inserted into the gearbox body (1). A limit pin (7) is inserted at the connection between the L-shaped frame (6) and the gearbox body (1).

6. The axial positioning device for the gear shaft of a wind turbine gearbox according to claim 5, characterized in that: A support rod (3) is inserted into one side of the bracket (5), and a connecting rod (4) is threaded into the support rod (3).

7. A wind turbine gearbox gear shaft axial positioning device according to claim 6, characterised in that: The plug rod (4) is connected to a sleeve rod (8) by a thread, and one end of the sleeve rod (8) is fixedly connected to the gearbox body (1).

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