Clutch type carbon brush slip ring device for cable twisting prevention of wind generating set

Abstract

The utility model relates to the technical field of wind power generation equipment, in particular to a clutch type carbon brush slip ring device for cable twisting prevention of a wind generating set, which comprises an upper turntable assembly, a lower turntable assembly, a clutch mechanism, a slip ring structure and a carbon brush assembly, the clutch mechanism comprises a guide assembly and a shaft sleeve capable of moving axially, when the upper rotating shaft rotates by a certain angle, the upper rotating shaft is meshed with the shaft sleeve through the guide assembly, the shaft sleeve is meshed with the lower rotating shaft through the guide assembly, and a complete torque transmission path can be formed between the upper rotating shaft and the lower rotating shaft. The binding post is electrically connected with the carbon brush assembly through a flexible wire, the arrangement mode of the flexible wire allows relative rotation of the upper rotating disc assembly and the lower rotating disc assembly, and under the condition that a torque transmission path is not formed between the upper rotating shaft and the lower rotating shaft, the upper rotating shaft does not drive the lower rotating shaft to rotate when rotating. The carbon brush assembly and the slip ring structure are kept relatively static, so that rotation friction between the carbon brush assembly and the slip ring structure can be reduced, and maintenance frequency and cost are reduced.

Description

A clutch-type carbon brush slip ring device for anti-twist cables of wind turbine generator sets Technical Field

[0001] This utility model belongs to the technical field of wind power generation equipment, specifically relating to a clutch-type carbon brush slip ring device for anti-twist cables of wind turbine generator sets. Background Technology

[0002] The nacelle of a wind turbine is typically mounted on top of the tower and rotates around the tower's axis to capture maximum wind energy, changing with wind direction. During this rotation, the equipment inside the nacelle rotates synchronously, causing cable twisting in the power cables and control circuitry connecting the generator and tower. To prevent cable breakage, after two rotations in the same direction, the nacelle needs to be reversed to its original position before the twisting, i.e., the cables are untied. This twisting and untiing process causes wear and tear on the cables.

[0003] Therefore, some solutions employ a contact-type conductive structure using slip rings and carbon brushes. Electrical energy is transferred through the sliding contact between the slip ring and the carbon brush, which can solve the problems of cable breakage and wear. However, any wind-induced movement in this solution will cause wear on the carbon brushes, and the wear and the resulting debris will increase the workload of equipment maintenance. Especially during high-power electrical transmission, the debris generated by carbon brush wear can even pose a fire risk.

[0004] Based on real-time wind direction statistics, the wind direction changes within 30° most of the time. Controlling the frequency and distance of the relative movement between the slip ring and carbon brush structure within this wind direction variation range will improve the safety of applying the slip ring and carbon brush structure and reduce the maintenance workload of the structure. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention proposes a clutch-type carbon brush slip ring device for anti-twist cables in wind turbine generator sets, which can reduce rotational friction between the carbon brush assembly and the slip ring structure, thereby reducing the frequency and cost of maintenance and repair.

[0006] To solve the above-mentioned technical problems, this utility model provides a clutch-type carbon brush slip ring device for anti-twist cables of wind turbine generator sets, comprising:

[0007] The upper turntable assembly includes an upper base plate, an upper rotating shaft, and a terminal block, wherein the upper rotating shaft is fixed to the upper base plate, and the terminal block is disposed on the upper base plate;

[0008] The lower turntable assembly includes a lower base plate and a lower rotating shaft, wherein the lower rotating shaft is fixed to the lower base plate and is coaxially arranged with the upper rotating shaft;

[0009] A clutch mechanism includes a guide assembly and an axially movable bushing. The guide assembly is respectively disposed between the bushing and the upper rotating shaft, and between the bushing and the lower rotating shaft. When the upper rotating shaft rotates by a first preset angle, the upper rotating shaft engages with the bushing through the guide assembly and drives the bushing to move axially. When it continues to rotate by a second preset angle, the bushing engages with the lower rotating shaft through the guide assembly to form a complete torque transmission path.

[0010] A slip ring structure is located below the lower turntable assembly and is rotatably connected to the lower rotating shaft;

[0011] The carbon brush assembly is fixed to the lower rotary disk assembly and slides in contact with the slip ring structure. The terminal is electrically connected to the carbon brush assembly via a flexible wire. The arrangement of the flexible wire allows relative rotation between the upper rotary disk assembly and the lower rotary disk assembly.

[0012] Preferably, in the above solution, the guide assembly includes a first pawl fixed to the periphery of the upper rotating shaft, a second pawl fixed to the periphery of the lower rotating shaft, and a third pawl fixed to the periphery of the bushing. When the upper rotating shaft rotates to the point where the first pawl engages with the third pawl, it can drive the bushing to rotate synchronously. When the third pawl continues to rotate to the point where it engages with the second pawl, it can drive the lower rotating shaft to rotate synchronously, so that the upper rotating shaft and the lower rotating shaft form a complete torque transmission path.

[0013] Preferably, in the above scheme, the number of the first claw, the second claw, and the third claw are the same, and the multiple third claws are arranged in a circumferential array around the bushing. The multiple bushings are sequentially sleeved and coaxially arranged between the upper rotating shaft and the lower rotating shaft, and the third claws on adjacent bushings are staggered.

[0014] Preferably, in the above scheme, the bushing includes a first concave inclined surface, a convex inclined surface, and a sliding member. The first concave inclined surface and the convex inclined surface are adapted to each other. The first concave inclined surface is disposed on the upper part of the bushing, the convex inclined surface is disposed on the lower part of the bushing, and a plurality of sliding members are arranged in a circumferential array on the first concave inclined surface.

[0015] Preferably, in the above scheme, the uppermost bushing is fitted onto the lower part of the upper rotating shaft, the lowermost bushing is fitted onto the upper part of the lower rotating shaft, the upper part of the lower rotating shaft is provided with a second concave inclined surface adapted to the convex inclined surface, and a plurality of sliding members are arranged in a circumferential array on the second concave inclined surface.

[0016] Preferably, in the above scheme, the clutch mechanism further includes fixing clips, which are arranged in a circumferential array on the outer side wall of the bushing. The number of fixing clips is the same as the number of terminals, and they are used to fix the flexible wire on the bushing.

[0017] Preferably, in the above scheme, the three terminals are fixed in a circumferential array to the upper seat plate outside the upper rotating shaft, the three carbon brush assemblies are fixed at intervals to the bottom of the lower seat plate, the slip ring structure includes three slip rings with different radii, the three slip rings are arranged at intervals from the inside to the outside directly below the lower seat plate, and the bottom of the carbon brush assembly slides in contact with the upper surface of the slip ring.

[0018] Preferably, in the above scheme, the lower seat plate is configured as a circular plate, the radius of the lower seat plate is larger than the radius of the slip ring, the carbon brush assembly includes a carbon brush holder and a mounting component, the carbon brush holder is fixed to the bottom of the lower seat plate by the mounting component, the bottom of the carbon brush holder slides in contact with the upper surface of the slip ring, and the upper surface of the slip ring is configured as an annular inclined surface.

[0019] Preferably, in the above solution, the lower seat plate includes an insulating baffle, and the insulating baffle is provided between two adjacent slip rings. The upper end of the insulating baffle is connected to the lower seat plate, and the lower end extends to the bottom of the slip ring.

[0020] Preferably, in the above scheme, the slip ring structure further includes an insulating support, the bottom of the slip ring is fixed on the insulating support, and the lower part of the lower rotating shaft passes through the lower seat plate and is rotatably connected to the insulating support.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. A clutch-type carbon brush slip ring device for anti-twist cables of wind turbine generator sets, comprising an upper rotary disk assembly, a lower rotary disk assembly, a clutch mechanism, a slip ring structure, and a carbon brush assembly. The clutch mechanism includes a guide assembly and an axially movable bushing. When the upper rotary disk rotates at a certain angle, the upper rotary disk engages with the bushing through the guide assembly, and the bushing engages with the lower rotary disk through the guide assembly. A complete torque transmission path can be formed between the upper and lower rotary disks. When no torque transmission path is formed between the upper and lower rotary disks, the rotation of the upper rotary disk will not drive the rotation of the lower rotary disk. The carbon brush assembly and the slip ring structure remain relatively stationary, which can reduce the rotational friction between the two, thereby reducing the frequency and cost of maintenance and repair.

[0023] 2. The guide assembly of this utility model includes a first pawl fixed to the periphery of the upper rotating shaft, a second pawl fixed to the periphery of the lower rotating shaft, and a third pawl fixed to the periphery of the bushing. When the upper rotating shaft rotates to the point where the first pawl and the third pawl engage, it can drive the bushing to rotate synchronously. When the third pawl continues to rotate to the point where it engages with the second pawl, it can drive the lower rotating shaft to rotate synchronously, so that a complete torque transmission path is formed between the upper rotating shaft and the lower rotating shaft.

[0024] 3. In this utility model, multiple bushings are sequentially sleeved and coaxially arranged between the upper and lower rotating shafts, which can obtain a torque transmission path with a larger rotation angle. The bushing includes a first concave inclined surface, a convex inclined surface, and sliding parts. The first concave inclined surface and the convex inclined surface are adapted to each other. Multiple sliding parts are arranged in a circumferential array on the first concave inclined surface, which can disperse the stress in the torque transmission process, enhance the torque transmission stability, reduce mechanical impact, and improve the structural life. It is suitable for the high torque requirements of high-power wind turbines.

[0025] 4. The fixing clips in this utility model are arranged in a circumferential array on the outer wall of the bushing. The number of fixing clips is the same as the number of terminals. They are used to fix the flexible wires on the bushing, which helps to arrange the flexible wires evenly and can prevent the flexible wires from getting tangled or broken during rotation.

[0026] 5. In this utility model, three slip rings with different radii are arranged at intervals from the inside to the outside directly below the lower base plate. The upper surface of the slip ring is set as an annular inclined surface. The bottom of the carbon brush assembly slides in contact with the upper surface of the slip ring. The carbon powder generated by the carbon brush assembly can fall from the gap between two adjacent slip rings. An insulating baffle is provided between two adjacent slip rings to physically isolate the adjacent slip rings and prevent carbon powder accumulation from causing circuit failure between adjacent slip rings. Attached Figure Description

[0027] Figure 1 is a schematic diagram of the structure of a clutch-type carbon brush slip ring device for anti-twist cable of wind turbine generator set according to the present invention.

[0028] Figure 2 is a front view of a clutch-type carbon brush slip ring device for anti-twist cable of wind turbine generator set according to the present invention.

[0029] Figure 3 is a schematic diagram of the structure of the bushing of this utility model.

[0030] Figure 4 is a structural schematic diagram of the upper turntable assembly of this utility model.

[0031] Figure 5 is a first-view structural schematic diagram of the lower turntable assembly of this utility model.

[0032] Figure 6 is a second-view structural schematic diagram of the lower turntable assembly of this utility model.

[0033] Figure 7 is a schematic diagram of the slip ring structure of this utility model.

[0034] Among them, 1-upper turntable assembly, 11-upper base plate, 12-upper rotating shaft, 13-terminal, 2-lower turntable assembly, 21-lower base plate, 211-inlet hole, 212-insulating baffle, 22-lower rotating shaft, 221-second concave inclined surface, 3-clutch mechanism, 31-guide assembly, 311-first claw, 312-second claw, 313-third claw, 32-shaft sleeve, 321-first concave inclined surface, 322-convex inclined surface, 323-sliding component, 33-fixed clamp, 4-slip ring structure, 41-slip ring, 42-insulating bracket, 5-carbon brush assembly, 51-carbon brush holder, 52-mounting component, 6-flexible wire. Detailed Implementation

[0035] 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.

[0036] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first," "second," and "third" are used in the description, they are for descriptive purposes and to distinguish technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure.

[0039] As shown in Figures 1 to 7, this utility model discloses a clutch-type carbon brush slip ring device for anti-twist cables of wind turbine generator sets, including an upper turntable assembly 1, a lower turntable assembly 2, a clutch mechanism 3, a slip ring structure 4, and a carbon brush assembly 5. The upper turntable assembly 1 includes an upper base plate 11, an upper rotating shaft 12, and a terminal block 13. The upper rotating shaft 12 is fixed to the upper base plate 11, and the terminal block 13 is disposed on the upper base plate 11. The lower turntable assembly 2 includes a lower base plate 21 and a lower rotating shaft 22. The lower rotating shaft 22 is fixed to the lower base plate 21 and coaxially arranged with the upper rotating shaft 12. The clutch mechanism 3 includes a guide assembly 31 and an axially movable bushing 32. The guide assembly 31 is respectively disposed on... Between the bushing 32 and the upper rotating shaft 12, and between the bushing 32 and the lower rotating shaft 22, when the upper rotating shaft 12 rotates by a first preset angle, the upper rotating shaft 12 engages with the bushing 32 through the guide component 31 and drives the bushing 32 to move axially. When it continues to rotate by a second preset angle, the bushing 32 engages with the lower rotating shaft 22 through the guide component 31 to form a complete torque transmission path. The slip ring structure 4 is fixed below the lower rotating disk assembly 2 and is coaxially arranged with the lower rotating shaft 22. The carbon brush assembly 5 is fixed to the lower rotating disk assembly 2 and slides in contact with the slip ring structure 4. The terminal 13 is electrically connected to the carbon brush assembly 5 through the flexible wire 6. The arrangement of the flexible wire 6 allows for relative rotation between the upper rotating disk assembly 1 and the lower rotating disk assembly 2.

[0040] In this embodiment, the upper mounting plate 11 is installed at the bottom of the wind turbine nacelle, the terminal block 13 is connected to the internal power transmission lines of the nacelle, and the slip ring structure 4 is fixedly installed inside the wind turbine tower. When the yaw system of the wind turbine drives the nacelle to rotate, it can drive the upper rotating shaft 12 to rotate synchronously. When the upper rotating shaft 12 rotates at a certain angle, the upper rotating shaft 12 engages with the bushing 32 through the guide assembly 31, and the bushing 32 engages with the lower rotating shaft 22 through the guide assembly 31. The upper rotating shaft 12 and the lower rotating shaft 22... A complete torque transmission path can be formed between the upper shaft 12 and the lower base plate 21, allowing the lower shaft 22 and the lower base plate 21 to rotate synchronously with the upper shaft 12, thereby driving the carbon brush assembly 5 to slide on the slip ring structure 4. When no torque transmission path is formed between the upper shaft 12 and the lower shaft 22, the upper shaft 12 will not drive the lower shaft to rotate when it rotates, and the carbon brush assembly 5 and the slip ring structure 4 will remain relatively stationary, which can reduce the rotational friction between the two, thereby reducing the frequency and cost of maintenance and repair.

[0041] Understandably, the flexible wires 6 can be arranged in an S-shape or a spiral shape, allowing the upper rotating shaft 12 to rotate to form a complete torque transmission path with the lower rotating shaft 22, and the lower base plate 21 can serve to support the redundant flexible wires 6.

[0042] Referring again to Figures 3 to 5, the guide assembly 31 in this embodiment includes a first pawl 311 fixed to the periphery of the upper rotating shaft 12, a second pawl 312 fixed to the periphery of the lower rotating shaft 22, and a third pawl 313 fixed to the periphery of the bushing 32. When the upper rotating shaft 12 rotates to the point where the first pawl 311 engages with the third pawl 313, it can drive the bushing 32 to rotate synchronously. When the third pawl 313 continues to rotate to the point where it engages with the second pawl 312, it can drive the lower rotating shaft 22 to rotate synchronously, so that the upper rotating shaft 12 and the lower rotating shaft 22 form a complete torque transmission path. Specifically, the number of first jaws 311, second jaws 312, and third jaws 313 is the same. Multiple third jaws 313 are arranged in a circumferential array around the bushing 32. The first preset angle is related to the number of jaws. Multiple bushings 32 are sequentially fitted and coaxially arranged between the upper rotating shaft 12 and the lower rotating shaft 22. The second preset angle is related to the number of bushings 32. The third jaws 313 on adjacent bushings 32 are staggered. By setting multiple sequentially fitted bushings 32, a torque transmission path with a larger rotation angle can be obtained.

[0043] In this embodiment, three bushings 32 are provided, and two third claws 313 are symmetrically arranged around the periphery of each bushing 32. Initially, the first claw 311 of the upper rotating shaft 12 and the third claw 313 of the uppermost bushing 32 are equally spaced. The four third claws 313 at the connection between two adjacent bushings 32 are equally spaced. The second claw 312 of the lower rotating shaft 22 and the third claw 313 of the lowermost bushing 32 are equally spaced. The first preset angle can be set to 90° and the second preset angle can be set to 270°. That is, when the upper rotating shaft 12 rotates 90° clockwise / counterclockwise, the first claw 311 and the third claw 313 can abut and mesh with each other. Continuing to rotate 270°, a clockwise / counterclockwise torque transmission path is formed between the upper rotating shaft 12, the three bushings 32 and the lower rotating shaft 22.

[0044] Furthermore, in this embodiment, the bushing 32 includes a first concave inclined surface 321, a convex inclined surface 322, and a sliding member 323. The first concave inclined surface 321 and the convex inclined surface 322 are adapted to each other. The first concave inclined surface 321 is located on the upper part of the bushing 32, and the convex inclined surface 322 is located on the lower part of the bushing 32. A plurality of sliding members 323 are arranged in a circumferential array on the first concave inclined surface 321. Preferably, the sliding member 323 can be configured as a sliding column or a ball structure to reduce the sliding friction between the contact surfaces of two adjacent bushings 32. Furthermore, the uppermost bushing 32 is fitted onto the lower part of the upper rotating shaft 12, and the lowermost bushing 32 is fitted onto the upper part of the lower rotating shaft 22. The upper part of the lower rotating shaft 22 is provided with a second concave inclined surface 221 that matches the convex inclined surface 322. Multiple sliding members 323 are arranged in a circumferential array on the second concave inclined surface 221. The bearing structure formed by the fitting of multiple bushings 32 can disperse the stress in the torque transmission process, enhance the torque transmission stability, reduce mechanical shock, and improve the structural life, making it suitable for the high torque requirements of high-power wind turbines.

[0045] In addition, the clutch mechanism 3 also includes a fixing clip 33, which is rotatably mounted on the bushing 32 and can adjust the clamping angle of the flexible wire 6. Multiple fixing clips 33 are arranged in a circumferential array on the outer wall of the bushing 32. The number of fixing clips 33 is the same as the number of terminals 13. They are used to fix the flexible wire 6 on the bushing 32, which helps to evenly distribute the flexible wire 6 and can prevent the flexible wire 6 from tangling or breaking during rotation.

[0046] Specifically, in this embodiment, three terminals 13 are fixed in a circumferential array to the upper base plate 11 outside the upper rotating shaft 12, which can meet the three-phase power transmission requirements of the wind turbine. Three carbon brush assemblies 5 are fixed at intervals to the bottom of the lower base plate 21. Referring to Figure 7, the slip ring structure 4 includes three slip rings 41 with different radii. The three slip rings 41 are arranged at intervals from the inside to the outside directly below the lower base plate 21. The bottom of the carbon brush assembly 5 slides in contact with the upper surface of the slip ring 41, and the carbon powder generated by the carbon brush assembly 5 can fall from the gap between two adjacent slip rings 41.

[0047] Referring again to Figures 5 and 6, the lower plate 21 is a circular plate with a radius larger than that of the slip ring 41. The lower plate 21 above the carbon brush assembly 5 has an inlet hole 211 to facilitate electrical connection between the flexible wire 6 and the carbon brush assembly 5. The carbon brush assembly 5 includes a carbon brush holder 51 and a mounting piece 52. The carbon brush holder 51 is fixed to the bottom of the lower plate 21 by the mounting piece 52, and the bottom of the carbon brush holder 51 slides in contact with the upper surface of the slip ring 41. Specifically, a spring is usually loaded above the carbon brush holder 51 so that the carbon brush holder 51 is in close contact with the slip ring 41 under the action of elasticity. The upper surface of the slip ring 41 is set as an annular inclined surface, so that the carbon powder generated by the friction between the carbon brush holder 51 and the slip ring 41 can more easily slide off the upper surface of the slip ring 41. Furthermore, the lower base plate 21 includes an insulating baffle 212. An insulating baffle 212 is provided between two adjacent slip rings 41. The upper end of the insulating baffle 212 is connected to the lower base plate 21, and the lower end extends to the bottom of the slip ring 41. This can isolate and insulate the three slip rings 41, preventing carbon powder accumulation from causing circuit faults between adjacent slip rings 41.

[0048] Referring again to Figure 7, in this embodiment, the slip ring structure 4 also includes an insulating bracket 42. The insulating bracket 42 is fixedly installed inside the tower of the wind turbine. The bottom of the slip ring 41 is fixed on the insulating bracket 42. The lower part of the lower rotating shaft 22 passes through the lower base plate 21 and is rotatably connected to the insulating bracket 42. The insulating bracket 42 serves to support the lower rotating shaft 22. The slip ring 41 is electrically connected to the external power transmission line.

[0049] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A clutch-type carbon brush slip ring device for anti-twist cables of wind turbine generator sets, characterized in that, include: The upper turntable assembly includes an upper base plate, an upper rotating shaft, and a terminal block, wherein the upper rotating shaft is fixed to the upper base plate, and the terminal block is disposed on the upper base plate; The lower turntable assembly includes a lower base plate and a lower rotating shaft, the lower rotating shaft being fixed to the lower base plate and coaxially arranged with the upper rotating shaft; the clutch mechanism includes a guide assembly and an axially movable bushing, the guide assembly being respectively disposed between the bushing and the upper rotating shaft, and between the bushing and the lower rotating shaft; when the upper rotating shaft rotates by a first preset angle, the upper rotating shaft engages with the bushing through the guide assembly and drives the bushing to move axially; when it continues to rotate by a second preset angle, the bushing engages with the lower rotating shaft through the guide assembly to form a complete torque transmission path; a slip ring structure is disposed below the lower turntable assembly and is rotatably connected to the lower rotating shaft; a carbon brush assembly is fixed to the lower turntable assembly and slides in contact with the slip ring structure; the terminal is electrically connected to the carbon brush assembly through a flexible wire, the arrangement of the flexible wire allowing relative rotation between the upper and lower turntable assemblies.

2. The clutch-type carbon brush slip ring device for anti-twist cable of wind turbine generator set according to claim 1, characterized in that, The guide assembly includes a first pawl fixed to the periphery of the upper rotating shaft, a second pawl fixed to the periphery of the lower rotating shaft, and a third pawl fixed to the periphery of the bushing. When the upper rotating shaft rotates to the point where the first pawl engages with the third pawl, it can drive the bushing to rotate synchronously. When the third pawl continues to rotate to the point where it engages with the second pawl, it can drive the lower rotating shaft to rotate synchronously, so that the upper rotating shaft and the lower rotating shaft form a complete torque transmission path.

3. A clutch-type carbon brush slip ring device for anti-twist cables of wind turbine generator sets according to claim 2, characterized in that, The first, second, and third claws are provided in the same number. Multiple third claws are arranged in a circumferential array around the bushing. Multiple bushings are sequentially sleeved and coaxially arranged between the upper rotating shaft and the lower rotating shaft. The third claws on adjacent bushings are staggered.

4. A clutch-type carbon brush slip ring device for anti-twist cables of wind turbine generator sets according to claim 3, characterized in that, The bushing includes a first concave inclined surface, a convex inclined surface, and sliding members. The first concave inclined surface and the convex inclined surface are adapted to each other. The first concave inclined surface is located on the upper part of the bushing, and the convex inclined surface is located on the lower part of the bushing. A plurality of sliding members are arranged in a circumferential array on the first concave inclined surface.

5. A clutch-type carbon brush slip ring device for anti-twist cables of wind turbine generator sets according to claim 4, characterized in that, The uppermost bushing is fitted onto the lower part of the upper rotating shaft, and the lowermost bushing is fitted onto the upper part of the lower rotating shaft. The upper part of the lower rotating shaft is provided with a second concave inclined surface that matches the convex inclined surface. A plurality of sliding members are arranged in a circumferential array on the second concave inclined surface.

6. A clutch-type carbon brush slip ring device for anti-twist cables of wind turbine generator sets according to claim 1, characterized in that, The clutch mechanism also includes fixing clips arranged in a circumferential array on the outer side wall of the bushing. The number of fixing clips is the same as the number of terminals, and they are used to fix the flexible wire on the bushing.

7. A clutch-type carbon brush slip ring device for anti-twist cables of wind turbine generator sets according to claim 6, characterized in that, The three terminals are fixed in a circumferential array to the upper seat plate outside the upper rotating shaft, and the three carbon brush assemblies are fixed at intervals to the bottom of the lower seat plate. The slip ring structure includes three slip rings with different radii, which are spaced apart from the inside to the outside and located directly below the lower seat plate. The bottom of the carbon brush assembly slides in contact with the upper surface of the slip ring.

8. A clutch-type carbon brush slip ring device for anti-twist cables of wind turbine generator sets according to claim 7, characterized in that, The lower plate is a circular plate with a radius larger than that of the slip ring. The carbon brush assembly includes a carbon brush holder and a mounting component. The carbon brush holder is fixed to the bottom of the lower plate by the mounting component. The bottom of the carbon brush holder slides in contact with the upper surface of the slip ring. The upper surface of the slip ring is a ring-shaped inclined surface.

9. A clutch-type carbon brush slip ring device for anti-twist cables of wind turbine generator sets according to claim 7, characterized in that, The lower base plate includes an insulating baffle. The insulating baffle is provided between two adjacent slip rings. The upper end of the insulating baffle is connected to the lower base plate, and the lower end extends to the bottom of the slip ring.

10. A clutch-type carbon brush slip ring device for anti-twist cables of wind turbine generator sets according to claim 7, characterized in that, The slip ring structure also includes an insulating support, the bottom of the slip ring is fixed to the insulating support, and the lower part of the lower rotating shaft passes through the lower seat plate and is rotatably connected to the insulating support.

Images