Wind generating set and power cable torsion resistance device thereof

Abstract

The invention discloses a wind generating set and a power cable anti-torsion device thereof, and the power cable anti-torsion device comprises two fixing frames, two arc-shaped transition plates arranged between the two fixing frames, two first supports arranged on the outer side of one fixing frame, and two second supports arranged on the outer side of the other fixing frame. A plurality of third brackets are arranged between the first brackets and the second brackets and between the two second brackets, a ladder stand is arranged between the two first brackets, a cable twist stopper is arranged between one end of each first bracket and the corresponding second bracket, the cable twist stopper is provided with a plurality of retainers, and a cable hanging point is arranged between the cable twist stopper and the arc-shaped transition plate; cable clamps are arranged at the tops of the two arc-shaped transition plates; according to the invention, the damage to the cable hanging point and the power cable caused by the fact that the power cable starts to twist from the cable hanging point in the yaw process of the cabin is prevented, and the defect that in the prior art, personnel can enter the cabin from the tower drum only after turning around or transitioning is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of anti-torsion of cables for wind turbines, and particularly relates to a wind turbine and an anti-torsion device for its power cable. Background Art

[0002] A wind turbine is a power device that converts wind energy into mechanical work, the mechanical work drives the rotor to rotate, and finally outputs alternating current. A wind turbine generally consists of components such as a wind wheel, a main shaft, a gearbox, a generator, a yaw mechanism, a tower, a nacelle cover, and a brake. Among them, to ensure that the wind turbine can obtain the maximum wind-catching ability and thus obtain the optimal power generation, the yaw mechanism will rotate the nacelle to align the wind turbine with the wind, while the tower barrel, as a fixed support structure, cannot rotate.

[0003] During the rotation of the nacelle, the power cable entering the tower barrel from the nacelle will also undergo large-angle torsion along with the yaw of the wind turbine. In the prior art, the power cable is limited by a hanging point bracket. The power cable support structure inside the tower barrel has the following problems: the rotation of the nacelle often causes the power cable to start twisting from the hanging point bracket, resulting in damage to the hanging point bracket or the power cable. Moreover, since the structure for personnel to enter the nacelle is divided into two parts, when personnel enter and exit the nacelle, they need to transfer from the tower barrel ladder to the nacelle ladder to enter the inner platform of the nacelle, which is not convenient for the maintenance and repair of the equipment on the inner platform of the nacelle. In summary, there is an urgent need for a wind turbine and an anti-torsion device for its power cable. Summary of the Invention

[0004] To solve some or all of the above technical problems existing in the prior art, the present invention provides a wind turbine and an anti-torsion device for its power cable.

[0005] On the one hand, the present invention provides a torsion-resistant device for the power cable of a wind turbine generator. The torsion-resistant device for the power cable is arranged inside the nacelle base. There is an inner platform inside the tower below the nacelle base, and there is an inner platform inside the nacelle on the nacelle base. The torsion-resistant device for the power cable is arranged between the inner platform inside the nacelle and the inner platform inside the tower. It is characterized in that the torsion-resistant device for the power cable includes two symmetrically arranged fixing frames and two arc-shaped transition plates symmetrically arranged between the two fixing frames. The fixing frames are arranged on one side of the inner platform inside the nacelle. The two arc-shaped transition plates are symmetrically arranged along the direction perpendicular to the axis of the fixing frame. There are two parallel first brackets arranged outside one of the fixing frames, and there are two parallel second brackets arranged outside the other fixing frame. A plurality of third brackets are arranged between the first bracket and the second bracket and between the two second brackets. There is a ladder between the two first brackets. A cable anti-twist device is arranged between the end of the first bracket far from the arc-shaped transition plate and the second bracket. A plurality of cages are evenly arranged circumferentially on the cable anti-twist device. A cable hanging point is arranged between the cable anti-twist device and the arc-shaped transition plate;

[0006] At the top of the ends of the two arc-shaped transition plates, there are symmetrically arranged cable clips. The cable clips are inclined at a preset angle with respect to the fixing frames. The cable clip includes two clamping plates oppositely arranged through fasteners. A cable fixing hole is arranged between the two clamping plates. The number of the cable fixing holes matches the number of the cages. One end of the arc-shaped transition plate is flush with the fixing frame, and the other end extends in a transitional manner towards the cable anti-twist device.

[0007] Furthermore, in the above-mentioned torsion-resistant device for the power cable of a wind turbine generator, the first bracket is perpendicular to the fixing frame, the second bracket is perpendicular to the fixing frame, the first bracket and the second bracket are parallel to each other, and the third bracket is perpendicular to the first bracket and the second bracket.

[0008] As a specific implementation manner, in the above-mentioned torsion-resistant device for the power cable of a wind turbine generator, the ladder includes a plurality of mutually parallel pedals. The pedals are perpendicular to the first bracket, and an anti-slip structure is arranged on the top of the pedals.

[0009] As a specific implementation manner, in the above-mentioned torsion-resistant device for the power cable of a wind turbine generator, symmetric guard plates are arranged on both sides of the arc-shaped transition plate.

[0010] As a specific implementation manner, in the above-mentioned torsion-resistant device for the power cable of a wind turbine generator, the fixing frame is made of I-beam.

[0011] As a specific embodiment, in the above-mentioned anti-torsion device for the power cable of a wind turbine generator, the first bracket, the second bracket, and the third bracket are all made of angle steel.

[0012] As a specific embodiment, in the above-mentioned anti-torsion device for the power cable of a wind turbine generator, the number of the cable fixing holes is 6 to 10.

[0013] On the other hand, the present invention also provides a wind turbine generator, which includes the above-mentioned anti-torsion device for the power cable.

[0014] The wind turbine generator and its anti-torsion device for the power cable of the present invention have the following advantages and positive effects:

[0015] In the present invention, the power cable is limited by the cable clamp, the cable hanging point, and the cable anti-torsion device in sequence, preventing the power cable from twisting starting from the cable hanging point during the yawing process of the nacelle, resulting in damage to the cable hanging point or the power cable, effectively improving the service life of the power cable, having good practicability, and moreover, a ladder is provided between the platform inside the tower barrel and the platform inside the nacelle of the present invention, avoiding the drawback that in the prior art, personnel need to turn around or make a transition to enter the nacelle from the tower barrel, making it more convenient for personnel to enter and exit the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts. In the drawings:

[0017] Figure 1 is a schematic structural diagram of the anti-torsion device for the power cable of a wind turbine generator of the present invention;

[0018] Figure 2 is a schematic structural diagram of the cable clamp in the anti-torsion device for the power cable of a wind turbine generator of the present invention;

[0019] Figure 3 is a front view of the anti-torsion device for the power cable of a wind turbine generator of the present invention;

[0020] Figure 4 is a top view of the anti-torsion device for the power cable of a wind turbine generator of the present invention.

[0021] Description of the reference numerals:

[0022] 1 - Fixed frame, 2 - Arc transition plate, 21 - Guard plate, 3 - First bracket, 4 - Second bracket, 5 - Third bracket, 6 - Ladder, 7 - Cable anti-twist device, 71 - Cage, 8 - Cable hanging point, 9 - Cable clamp, 91 - Splint, 92 - Cable fixing hole, 100 - Cabin base, 200 - Inner cabin platform. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

[0024] As Figures 1 to 4 shown, the present invention provides a wind turbine generator set and its power cable anti-twist device.

[0025] On the one hand, the present invention discloses a torsional resistance device for power cables of a wind turbine generator. The torsional resistance device for power cables is arranged inside the nacelle base 100. There is a platform inside the tower barrel (not shown in the figure) below the nacelle base 100. There is an inner nacelle platform 200 inside the nacelle base 100. The torsional resistance device for power cables is arranged between the inner nacelle platform 200 and the platform inside the tower barrel. The torsional resistance device for power cables includes two symmetrically arranged fixing frames 1 and two arc-shaped transition plates 2 symmetrically arranged between the two fixing frames 1. The fixing frame 1 is arranged on one side of the inner nacelle platform 200. The two arc-shaped transition plates 2 are symmetrically arranged along the direction perpendicular to the axis of the fixing frame 1. There is a preset angle between the arc-shaped transition plate 2 and the fixing frame 1. On the outside of one fixing frame 1, there are two parallel first brackets 3. On the outside of the other fixing frame 1, there are two parallel second brackets 4. A plurality of third brackets 5 are arranged between the first bracket 3 and the second bracket 4 and between the two second brackets 4. A ladder 6 is arranged between the two first brackets 3. The ladder 6 is connected between the platform inside the tower barrel and the inner nacelle platform 200. A cable anti-torsion device 7 is arranged between the end of the first bracket 3 away from the arc-shaped transition plate 2 and the second bracket 4. A plurality of cages 71 are evenly arranged circumferentially on the cable anti-torsion device 7. The inner diameter of the cage 71 matches the outer diameter of the power cable (not shown in the figure). The position of the power cable can be limited by the cage 71. A cable hanging point 8 is arranged between the cable anti-torsion device 7 and the arc-shaped transition plate 2. The cable hanging point 8 is arranged between the first bracket 3 and the second bracket 4. At the top of the ends of the two arc-shaped transition plates 2, there are symmetrically arranged cable clamps 9. There is a preset angle between the cable clamp 9 and the fixing frame 1. The cable clamp 9 includes two clamping plates 91 arranged oppositely by fasteners. A cable fixing hole 92 is arranged between the two clamping plates 91. The diameter of the cable fixing hole 92 matches the outer diameter of the power cable. By tightening the fasteners, the fixing of the power cable in the cable fixing hole 92 can be achieved. The number of the cable fixing holes 92 matches the number of the cages 71. One end of the arc-shaped transition plate 2 is flush with the fixing frame 1, and the other end extends in a transitional manner towards the cable anti-torsion device 7. The two ends of the arc-shaped transition plate 2 are perpendicular to each other, and the middle part is an arc-shaped transition.

[0026] Further, in the torsional resistance device for power cables of a wind turbine generator of the present invention, the first bracket 3 is perpendicular to the fixing frame 1, the second bracket 4 is perpendicular to the fixing frame 1, the first bracket 3 and the second bracket 4 are parallel to each other, and the third bracket 5 is perpendicular to the first bracket 3 and the second bracket 4.

[0027] As a specific embodiment, in the anti-torsion device for the power cable of the wind turbine generator of the present invention, the ladder 6 includes a plurality of pedals parallel to each other, and the pedals are perpendicular to the first bracket 3. To ensure the stability of the pedals, reinforcing ribs can also be provided between the pedals and the first bracket 3. The top of the pedals is provided with an anti-slip structure. More specifically, the anti-slip structure is an anti-slip rubber layer. The pedals are made of square steel pipes. During the use of this device, the staff can directly enter the nacelle inner platform 200 from the tower inner platform through the ladder 6.

[0028] As a specific embodiment, in the anti-torsion device for the power cable of the wind turbine generator of the present invention, symmetric guard plates 21 are provided on both sides of the arc-shaped transition plate 2. With this setting, it is possible to prevent the power cable located on the arc-shaped transition plate 2 from slipping during use, and to prevent the power cable from coming into contact with the fixing frame 1 during the yawing of the nacelle, causing damage to the fixing frame 1 or the power cable.

[0029] As a specific embodiment, in the anti-torsion device for the power cable of the wind turbine generator of the present invention, the fixing frame 1 is made of I-beam. With this setting, it is because the I-beam is relatively easy to obtain materials, and it reduces the overall manufacturing cycle and manufacturing cost of this device.

[0030] As a specific embodiment, in the anti-torsion device for the power cable of the wind turbine generator of the present invention, the first bracket 3, the second bracket 4, and the third bracket 5 are all made of angle steel. With this setting, it is because the angle steel is relatively easy to obtain materials, and it reduces the overall manufacturing cycle and manufacturing cost of this device.

[0031] As a specific embodiment, in the anti-torsion device for the power cable of the wind turbine generator of the present invention, the number of cable fixing holes 92 is 6 to 10. More specifically, the number of cable fixing holes 92 is 8. Each cable clamp 9 is provided with 4 cable fixing holes 92. Correspondingly, the number of the cage 71 is also 8. Of course, the number of the cable fixing holes 92 and the cage 71 needs to be set according to the size specifications of the power cable during actual use.

[0032] As a specific embodiment, in the anti-torsion device for the power cable of the wind turbine generator of the present invention, the cable hanging point 8 includes but is not limited to a cable clamping plate and a wire mesh sleeve.

[0033] On the other hand, the present invention also provides a wind turbine generator, and the wind turbine generator includes the above-mentioned anti-torsion device for the power cable.

[0034] The working principle of the anti-torsion device for the power cable of a wind turbine in the present invention is as follows: During the use of this device, the power cable in the nacelle passes through the cable fixing holes 92 on the clamping plate 91 in an orderly manner, then extends vertically downward through the arc-shaped transition plate 2 and passes through the cable hanging point 8, and finally penetrates into the cage 71 on the cable anti-torsion device 7 to complete the fixation. When the nacelle yaws and rotates, due to the position limitation of the power cable by the cable clamp 9, the power cable at the cable hanging point 8 does not twist, playing an anti-torsion role for the power cable.

[0035] In summary, compared with the prior art, the wind turbine and its anti-torsion device for the power cable in the present invention have the following advantages and positive effects:

[0036] In the present invention, the power cable is limited in position by the cable clamp 9, the cable hanging point 8, and the cable anti-torsion device 7 in sequence, preventing the power cable from twisting starting from the cable hanging point 8 during the yawing process of the nacelle, resulting in damage to the cable hanging point 8 or the power cable, effectively improving the service life of the power cable, and having good practicability. Moreover, a ladder 6 is provided between the platform in the tower barrel and the platform 200 in the nacelle in the present invention, avoiding the drawback in the prior art that personnel need to turn around or make a transition to enter the nacelle from the tower barrel, making it more convenient for personnel to enter and exit the machine.

[0037] It should be noted that in this article, unless otherwise clearly specified and limited, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood according to specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to this process, method, article or device. In addition, in this article, "front", "rear", "left", "right", "up" and "down" are all referenced with the placement state shown in the drawings.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A power cable anti-torsion device for a wind turbine generator set, wherein the power cable anti-torsion device is arranged in a nacelle base, an inner tower platform is arranged below the nacelle base, the nacelle base is provided with an inner nacelle platform, and the power cable anti-torsion device is arranged between the inner nacelle platform and the inner tower platform, characterized in that: The power cable anti-torsion device comprises two symmetrically arranged fixing frames and two arc-shaped transition plates symmetrically arranged between the two fixing frames, the fixing frames are arranged on one side of the platform in the cabin, the two arc-shaped transition plates are symmetrically arranged along the direction perpendicular to the axis of the fixing frames, two first brackets parallel to each other are arranged on the outer side of one fixing frame, two second brackets parallel to each other are arranged on the outer side of the other fixing frame, a plurality of third brackets are arranged between the first bracket and the second bracket and between the two second brackets, a ladder is arranged between the two first brackets, a cable torque stopper is arranged between one end of the first bracket away from the arc-shaped transition plate and the second bracket, a plurality of retaining frames are evenly arranged on the circumference of the cable torque stopper, and a cable hanging point is arranged between the cable torque stopper and the arc-shaped transition plate; The top ends of the two arc-shaped transition plates are provided with symmetrical cable clamps, and the cable clamps are inclined at a preset angle to the fixing frame. The cable clamps include two clamping plates arranged relative to each other through fasteners, and a cable fixing hole is provided between the two clamping plates. The number of the cable fixing holes matches the number of the retaining frames. One end of the arc-shaped transition plate is flush with the fixing frame, and the other end extends in a transitional manner toward the cable torque stopper.

2. The power cable anti-torsion device for a wind turbine generator set according to claim 1, characterized in that: The first bracket is perpendicular to the fixing bracket, the second bracket is perpendicular to the fixing bracket, the first bracket and the second bracket are parallel to each other, and the third bracket is perpendicular to the first bracket and the second bracket.

3. The power cable anti-torsion device for a wind turbine generator set according to claim 1, characterized in that: The ladder comprises a plurality of pedals which are parallel to each other, the pedals are perpendicular to the first bracket, and an anti-slip structure is arranged on the top of the pedals.

4. The power cable anti-torsion device for a wind turbine generator set according to claim 1, characterized in that: Symmetrical guard plates are arranged on both sides of the arc-shaped transition plate.

5. The power cable anti-torsion device for a wind turbine generator set according to claim 1, characterized in that: The fixing frame is made of I-beam.

6. The power cable anti-torsion device for a wind turbine generator set according to claim 1, characterized in that: The first bracket, the second bracket and the third bracket are all made of angle steel.

7. The power cable anti-torsion device for a wind turbine generator set according to claim 1, characterized in that: The number of the cable fixing holes is 6 to 10.

8. A wind turbine generator set, characterized in that: The wind turbine generator set comprises the power cable anti-torsion device according to any one of claims 1-7.

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