Main shaft of wind driven generator

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By designing a multi-layer connection mechanism on the spindle of the wind turbine, the vibration and loose parts caused by unstable spindle connections in the prior art are solved, and higher equipment safety and normal operation are achieved.

CN222650347UActive Publication Date: 2025-03-21WUXI XINYUAN ELECTROMECHANICAL PRECISION MFG CO LTD

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Patent Information

Application Number: CN202421644412.4
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-07-12
Publication Date: 2025-03-21
Estimated Expiration: 2034-07-12

AI Technical Summary

Technical Problem

When the existing wind turbine spindle is connected to other parts, due to the single connection structure, the connection between the parts and the spindle is not stable enough, and vibration occurs during the equipment operation, causing the parts to loosen and fall off, affecting the normal operation and safety of the generator.

Method used

A wind turbine spindle is designed, adopting a multi-layer connection mechanism, including the first flange, the second flange, the positioning hole, the spring, the stop, the bolt and other components. Through the cooperation of these components, more stable connection and angle adjustment are achieved, and the safety of the equipment is enhanced.

Benefits of technology

Through the design of the multi-layer connection mechanism, the connection stability between the wind turbine spindle and other parts is improved, the vibration during equipment operation and the looseness of parts is reduced, and the normal operation and safety of the generator is ensured.

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Abstract

The utility model relates to the related technical field of generators, in particular to a main shaft of a wind driven generator, which comprises a shaft body, a protective layer is arranged on the surface of the shaft body, and the protective layer is formed by combining a lubricating coating, a wear-resistant layer and a heat-resistant layer. According to the main shaft of the wind driven generator, through the arrangement of the connecting mechanism, when the shaft body is installed, the positioning holes in the surface of the first flange plate are aligned with the positioning holes in the surface of the second flange plate, and the positioning pins penetrate through the two groups of positioning holes; when the check block is pulled, the first spring pulls the positioning pin out of the positioning hole, the first flange plate is rotated, after positioning is completed, the bolt penetrates through the two sets of threaded holes and tightens the nut, meanwhile, the bolt can be loosened due to vibration generated when equipment runs, the limiting block is bounced into the limiting hole through the second spring to clamp the bolt, and the positioning effect is good. Therefore, the bolt is not easy to loosen, and the safety of equipment is improved.

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Description

Technical Field

[0001] The utility model relates to the technical field related to wind power generation, in particular to a main shaft of a wind power generator. Background Art

[0002] As the global demand for clean energy continues to grow, wind power generation has been widely used and developed as a renewable and pollution-free way of obtaining energy. In a wind turbine generator set, the main shaft is a key component connecting the wind wheel and the gearbox or generator. Its performance directly affects the operating efficiency and reliability of the entire unit. Therefore, a wind turbine generator set main shaft is particularly needed.

[0003] However, when the main shaft of an existing wind turbine generator set is connected to other parts, due to the single connection structure, the connection between the parts and the main shaft is often not stable enough, and the equipment vibrates during operation, causing the connection between the parts to loosen and fall off, thereby affecting the normal operation of the generator and reducing the safety of the generator. Utility Model Content

[0004] The purpose of the utility model is to provide a main shaft of a wind turbine generator to solve the problem that the main shaft of the existing wind turbine generator set proposed in the above background technology, when connected with other parts, due to the single connection structure, often leads to an unstable connection between the parts and the main shaft, and the equipment vibrates during operation, causing the connection between the parts to loosen and fall off, thereby affecting the normal operation of the generator and reducing the safety of the generator.

[0005] To achieve the above object, the utility model provides the following technical solution: a main shaft of a wind turbine generator, comprising a shaft body, a protective layer is provided on the surface of the shaft body, a first flange is fixedly connected to one end of the shaft body, a surface of the first flange is provided with an anti-slip texture, a cooling component is provided inside the shaft body, and a connecting mechanism is provided on the surface of the first flange;

[0006] The connecting mechanism includes a second flange, a connecting piece, a positioning hole, a first spring, a block, a positioning pin, a threaded hole, a bolt, a nut, a clamping hole, a second spring, a limit block, a clamping block and a limit hole, one end of the first flange is threadedly connected to the second flange, one end of the second flange is fixedly connected to the connecting piece, a positioning hole is provided on the surface of the second flange, the inner wall of the positioning hole is fixedly connected to the first spring, one end of the first spring is fixedly connected to the block, one end of the block is fixedly connected to the positioning pin, a threaded hole is provided on the surface of the second flange, the inner wall of the threaded hole is threadedly connected to the bolt, the outer wall of the bolt is threadedly connected to the nut, the inner wall of the threaded hole is provided with a clamping hole, the inner wall of the clamping hole is fixedly connected to the second spring, one end of the second spring is fixedly connected to the limiting block, one end of the limiting block is fixedly connected to the clamping block, and the inner wall of the bolt is provided with a limiting hole.

[0007] Preferably, the anti-slip texture is arranged on the surface of the first flange and has a mesh-shaped structure.

[0008] Preferably, the cooling assembly includes a first heat dissipation fin, a cooling pipe, a second heat dissipation fin, a sealing plug and a connecting plate, the first heat dissipation fin is fixedly connected to the surface of the shaft body, the cooling pipe is fixedly connected to the inside of the shaft body, the second heat dissipation fin is fixedly connected to the surface of the cooling pipe, the cooling pipe is connected to the inside of the cooling pipe, and the connecting plate is fixedly connected to the surface of the sealing plug.

[0009] Preferably, the first heat dissipation fins are evenly distributed on the surface of the shaft body, and the material of the first heat dissipation fins is aluminum alloy.

[0010] Preferably, the second heat dissipating fins are distributed in a spiral shape on the surface of the cooling pipe, and the second heat dissipating fins and the cooling pipe are connected by welding.

[0011] Preferably, the inner wall size of the positioning hole matches the outer wall size of the positioning pin, and the stopper forms a telescopic structure for the positioning pin through a first spring.

[0012] Preferably, a plurality of groups of bolts are arranged on the surface of the first flange, and the outer wall size of the clamping block is consistent with the inner wall size of the limiting hole.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: for the main shaft of a wind turbine generator, through the setting of the connecting mechanism, when the shaft body is installed, the positioning hole on the surface of the first flange is aligned with the positioning hole on the surface of the second flange, and the positioning pin passes through the two groups of positioning holes. When it is necessary to adjust the angle between the first flange and the second flange, the first spring pulls the positioning pin out of the positioning hole when the stop block is pulled, and the first flange is rotated. After the positioning is completed, the bolt passes through the two groups of threaded holes and the nut is tightened. At the same time, the bolt will loosen due to vibration during the operation of the equipment. The limit block is bounced into the limit hole by the second spring to engage the bolt, so that the bolt will not loosen easily, thereby improving the safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the side view of the appearance structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the second heat dissipation fin and the cooling pipe cooperating with each other in the utility model;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the cooling assembly of the utility model;

[0017] Figure 4 This is a schematic cross-sectional view of the connection mechanism of the utility model;

[0018] Figure 5 For this utility model Figure 4 The enlarged structural diagram at A in the middle;

[0019] Figure 6 For this utility model Figure 4 Enlarged structural diagram at B in the middle.

[0020] In the figure: 1. shaft; 2. protective layer; 3. first flange; 4. anti-slip pattern; 5. cooling component; 501. first heat dissipating fin; 502. cooling pipe; 503. second heat dissipating fin; 504. sealing plug; 505. connecting piece; 6. connecting mechanism; 601. second flange; 602. first flange; 603. positioning hole; 604. first spring; 605. stopper; 606. positioning pin; 607. threaded hole; 608. bolt; 609. nut; 610. clamping hole; 611. second spring; 612. limit block; 613. clamping block; 614. limit hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-6 The utility model provides a technical solution: a main shaft of a wind turbine generator, comprising a shaft body 1, a protective layer 2 is arranged on the surface of the shaft body 1, a first flange 3 is fixedly connected to one end of the shaft body 1, a non-slip texture 4 is arranged on the surface of the first flange 3, a cooling component 5 is arranged inside the shaft body 1, and a connecting mechanism 6 is arranged on the surface of the first flange 3;

[0023] The connecting mechanism 6 includes a second flange 601, a connecting piece 602, a positioning hole 603, a first spring 604, a stopper 605, a positioning pin 606, a threaded hole 607, a bolt 608, a nut 609, a clamping hole 610, a second spring 611, a limiting block 612, a clamping block 613 and a limiting hole 614. One end of the first flange 3 is threadedly connected to the second flange 601, one end of the second flange 601 is fixedly connected to the connecting piece 602, and the surface of the second flange 601 is provided with a A positioning hole 603 is provided, and a first spring 604 is fixedly connected to the inner wall of the positioning hole 603, and a stopper 605 is fixedly connected to one end of the first spring 604, and a positioning pin 606 is fixedly connected to one end of the stopper 605. A threaded hole 607 is provided on the surface of the second flange 601, and a bolt 608 is threadedly connected to the inner wall of the threaded hole 607, and a nut 609 is threadedly connected to the outer wall of the bolt 608, and a clamping hole 610 is provided on the inner wall of the threaded hole 607, and a first spring 604 is fixedly connected to one end of the first spring 604. The second spring 611 has one end fixedly connected to the limiting block 612, and one end of the limiting block 612 is fixedly connected to the clamping block 613. The inner wall of the bolt 608 is provided with a limiting hole 614. Through the setting of the connecting mechanism 6, when the shaft body 1 is installed, the positioning holes 603 on the surface of the first flange 3 are aligned with the positioning holes 603 on the surface of the second flange 601. The positioning pin 606 passes through the two groups of positioning holes 603. When the angle between the first flange 3 and the second flange 601 needs to be adjusted, When the stopper 605 is pulled, the first spring 604 pulls the positioning pin 606 out of the positioning hole 603, and the first flange 3 is rotated. After the positioning is completed, the bolt 608 passes through the two sets of threaded holes 607 and the nut 609 is tightened. At the same time, the bolt 608 will loosen due to vibration during the operation of the equipment. The limit block 612 is rebounded into the limit hole 614 by the second spring 611 to engage the bolt 608, so that the bolt 608 will not loosen easily, thereby improving the safety of the equipment.

[0024] Furthermore, the anti-slip texture 4 is arranged on the surface of the first flange 3 and has a mesh structure. Through the setting of the anti-slip texture 4, when the first flange 3 is connected with other components, the mesh-shaped anti-slip texture 4 can increase the roughness of the surface of the first flange 3. The increase in roughness increases the contact area between the first flange 3 and the mating components, and the friction force also increases accordingly.

[0025] Furthermore, the cooling assembly 5 includes a first heat dissipation fin 501, a cooling pipe 502, a second heat dissipation fin 503, a sealing plug 504 and a connecting piece 505. The surface of the shaft body 1 is fixedly connected with the first heat dissipation fin 501, the interior of the shaft body 1 is fixedly connected with the cooling pipe 502, the surface of the cooling pipe 502 is fixedly connected with the second heat dissipation fin 503, the interior of the cooling pipe 502 is connected with the sealing plug 504, and the surface of the sealing plug 504 is fixedly connected with the connecting piece 505. By setting the cooling assembly 5, when the shaft body 1 starts to operate and generates heat The heat is first conducted to the surface of the shaft body 1. The first heat dissipation fins 501 fixedly connected to the surface of the shaft body 1 increase the contact area with the air, and can quickly dissipate part of the heat on the surface of the shaft body 1 to the surrounding environment, thereby playing a role in preliminary heat dissipation. At this time, the coolant pre-injected into the cooling pipe 502 will absorb a large amount of heat inside the shaft body 1 through heat exchange, and the second heat dissipation fins 503 fixedly connected to the surface of the cooling pipe 502 further increase the contact area with the coolant, thereby accelerating the speed at which heat is transferred from the shaft body 1 to the coolant and improving the cooling efficiency.

[0026] Furthermore, the first heat dissipating fins 501 are evenly distributed on the surface of the shaft body 1, and the material of the first heat dissipating fins 501 is aluminum alloy. The provision of the first heat dissipating fins 501 effectively assists in reducing the temperature of the shaft body 1, thereby ensuring the normal operation of the generator main shaft.

[0027] Furthermore, the second heat dissipation fins 503 are spirally distributed on the surface of the cooling pipe 502, and the second heat dissipation fins 503 are connected to the cooling pipe 502 by welding. Through the setting of the second heat dissipation fins 503, when in use, the second heat dissipation fins 503 spirally distributed and welded on the surface of the cooling pipe 502 effectively enhance the heat dissipation performance.

[0028] Furthermore, the inner wall size of the positioning hole 603 is consistent with the outer wall size of the positioning pin 606, and the block 605 forms a telescopic structure for the positioning pin 606 through the first spring 604. Through the setting of the positioning pin 606, the angle between the first flange 3 and the second flange 601 can be quickly adjusted, thereby increasing the accuracy of the position of the shaft body 1.

[0029] Furthermore, multiple groups of bolts 608 are arranged on the surface of the first flange 3, and the outer wall size of the block 613 is consistent with the inner wall size of the limiting hole 614. Through the arrangement of the bolts 608, the block 613 and the limiting hole 614, the multiple groups of bolts 608 make the connection between the first flange 3 and the second flange 601 more stable. The block 613 can prevent the bolt 608 from falling off due to vibration, thereby increasing the stability of the connection between the bolt 608 and the threaded hole 607.

[0030] Working principle: When the shaft body 1 is installed, the positioning holes 603 on the surface of the first flange 3 are aligned with the positioning holes 603 on the surface of the second flange 601, and the positioning pins 606 pass through the two groups of positioning holes 603. When the angle between the first flange 3 and the second flange 601 needs to be adjusted, the first spring 604 pulls the positioning pins 606 out of the positioning holes 603 when the stopper 605 is pulled, and the first flange 3 is rotated. After the positioning is completed, the bolts 608 pass through the two groups of threaded holes 607 and tighten the nuts 609. At the same time, the bolts 608 will loosen due to vibration during the operation of the equipment, and the limit block 612 will bounce the limit block 612 into the limit hole 614 through the second spring 611 to engage the bolt 608, so that the bolt 608 will not loosen easily, which improves the safety of the equipment. During the operation of the main shaft of the wind turbine, when the shaft 1 starts to run and generates heat, the heat is first conducted to the surface of the shaft 1. The first heat dissipation fins 501 fixedly connected to the surface of the shaft 1 increase the contact area with the air, and can quickly dissipate part of the heat on the surface of the shaft 1 to the surrounding environment, playing a role in preliminary heat dissipation. At this time, the coolant pre-injected into the cooling pipe 502 will absorb a large amount of heat inside the shaft 1 through heat exchange, and the second heat dissipation fins 503 fixedly connected to the surface of the cooling pipe 502 further increase the contact area with the coolant, thereby accelerating the speed at which heat is transferred from the shaft 1 to the coolant and improving the cooling efficiency.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A main shaft of a wind turbine generator, comprising a shaft body (1), characterized in that: The surface of the shaft body (1) is provided with a protective layer (2); one end of the shaft body (1) is fixedly connected to a first flange (3); the surface of the first flange (3) is provided with an anti-slip texture (4); a cooling component (5) is provided inside the shaft body (1); and a connecting mechanism (6) is provided on the surface of the first flange (3); The connecting mechanism (6) comprises a second flange (601), a connecting piece (602), a positioning hole (603), a first spring (604), a stopper (605), a positioning pin (606), a threaded hole (607), a bolt (608), a nut (609), a clamping hole (610), a second spring (611), a limiting block (612), a clamping block (613) and a limiting hole (614); one end of the first flange (3) is threadedly connected to the second flange (601); one end of the second flange (601) is fixedly connected to the connecting piece (602); a positioning hole (603) is provided on the surface of the second flange (601); the inner wall of the positioning hole (603) is fixedly connected to the first spring (604); the first spring (611) is threadedly connected to the second flange (601); One end of the spring (604) is fixedly connected to a stopper (605), one end of the stopper (605) is fixedly connected to a positioning pin (606), a threaded hole (607) is provided on the surface of the second flange (601), the inner wall of the threaded hole (607) is threadedly connected to a bolt (608), the outer wall of the bolt (608) is threadedly connected to a nut (609), a clamping hole (610) is provided on the inner wall of the threaded hole (607), a second spring (611) is fixedly connected to the inner wall of the clamping hole (610), one end of the second spring (611) is fixedly connected to a limiting block (612), one end of the limiting block (612) is fixedly connected to a clamping block (613), and a limiting hole (614) is provided on the inner wall of the bolt (608).

2. A wind turbine main shaft according to claim 1, characterized in that: The anti-slip texture (4) is arranged on the surface of the first flange (3) and has a mesh-shaped structure.

3. A wind turbine main shaft according to claim 1, characterized in that: The cooling assembly (5) comprises a first heat dissipation fin (501), a cooling pipe (502), a second heat dissipation fin (503), a sealing plug (504) and a connecting piece (505); the first heat dissipation fin (501) is fixedly connected to the surface of the shaft body (1); the cooling pipe (502) is fixedly connected to the interior of the shaft body (1); the second heat dissipation fin (503) is fixedly connected to the surface of the cooling pipe (502); the sealing plug (504) is connected to the interior of the cooling pipe (502); and the connecting piece (505) is fixedly connected to the surface of the sealing plug (504).

4. A wind turbine main shaft according to claim 3, characterized in that: The first heat dissipation fins (501) are evenly distributed on the surface of the shaft body (1), and the material of the first heat dissipation fins (501) is aluminum alloy.

5. A wind turbine main shaft according to claim 3, characterized in that: The second heat dissipation fins (503) are distributed in a spiral shape on the surface of the cooling pipe (502), and the second heat dissipation fins (503) and the cooling pipe (502) are connected by welding.

6. A main shaft of a wind turbine generator according to claim 1, characterized in that: The inner wall size of the positioning hole (603) matches the outer wall size of the positioning pin (606), and the stopper (605) forms a telescopic structure for the positioning pin (606) through the first spring (604).

7. A main shaft of a wind turbine generator according to claim 1, characterized in that: A plurality of groups of bolts (608) are arranged on the surface of the first flange (3), and the outer wall size of the clamping block (613) matches the inner wall size of the limiting hole (614).