Cable protection device for wind generating set

Abstract

The invention discloses a cable protection device for a wind generating set, which comprises a crawling ladder, a first damping assembly, a second damping assembly and a friction assembly, the crawling ladder is arranged in a tower of the wind generating set, and the crawling ladder is fixedly connected with one end of a first support rod and one end of a second support rod; the first damping assembly reduces the vibration force from the wind direction on the cable, the second damping assembly reduces the vibration force from the wind direction and the tangential direction of the wind direction on the cable, and a friction assembly is arranged in the second damping assembly and reduces the friction force on the outer skin when the cable is extended or shortened. The mode of combining the first damping assembly and the second damping assembly is adopted to reduce vibration force borne by the cable in different directions, and the stability of the cable is improved. The friction assembly is adopted at the part in contact with the cable to replace a traditional cable fixing device to be in direct contact with the cable, so that the friction force borne by the surface of the cable is reduced, and the possibility of safety accidents is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of cable protection, in particular to a cable protection device for a wind turbine generator set. Background Art

[0002] With the continuous development of the current power industry, the demand for the use and protection of cables is also increasing. The protection of cables in wind power generation devices is extremely important. The cables connected to the wind turbine in traditional devices will twist and move with the yaw of the wind turbine. The wind turbine will perform yaw control according to the wind force. The cables are installed inside the tower. The wind turbine and the tower are easily affected by wind or other external environments and shake, so the cables are prone to shaking. If the cables shake frequently, it is easy for the interface between the cables and the wind turbine to loosen and fall off.

[0003] When the cable twists and yaws with the wind turbine, the cable surface will rub against the traditional fixing device. Frequent friction may easily cause the cable surface to be damaged. Damage to the cable surface may easily cause damage to the inside of the cable, leading to safety accidents such as fire and leakage.

[0004] Therefore, in response to the above problems, the following solutions are proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a cable protection device for a wind turbine generator set to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: A cable protection device for a wind turbine generator set, comprising a ladder, which is arranged in the tower of the wind turbine generator set, and the ladder is fixedly connected to one end of a first support rod and a second support rod, and the other end of the first support rod is fixedly connected to the other end of the second support rod, and also comprises a first shock-absorbing assembly, a second shock-absorbing assembly, and a friction assembly, the first shock-absorbing assembly is arranged on the first support rod and the second support rod, the second shock-absorbing assembly is arranged in the first shock-absorbing assembly, and the friction assembly is arranged in the second shock-absorbing assembly, and the friction assembly reduces the friction force on the outer skin of the cable when it is extended or shortened.

[0007] Preferably, the first shock-absorbing assembly includes a shock-absorbing slider and a first damper. The interior of the shock-absorbing slider is hollow and a pulley is provided inside. A slide groove is provided on the first support rod. The shock-absorbing slider is sleeved on the end of the first support rod and is slidably connected. The end of the first damper piston rod is fixedly connected inside the shock-absorbing slider. The fixed rod end of the first damper is fixedly connected to the end of the first support rod inserted into the interior of the shock-absorbing slider. The outer side of the end of the first support rod is fixedly connected to one end of the second support rod. The outer surface of the shock-absorbing slider is fixedly connected to the retaining ring. The retaining ring is fixedly connected to the piston rod end of the second damper, the fixed end of the second damper is fixedly connected to one side of the third support rod, the third support rod is fixedly connected to the first support rod, one end of the return spring is fixedly connected to the third support rod, the other end of the return spring is fixedly connected to the retaining ring, and a return rod is sleeved in the middle of the return spring, one end of the return rod is fixedly connected to the retaining ring, and the other end is slidably connected to pass through the other side of the third support rod, and a limit block is set on the other end of the retaining ring, the limit block limits the moving distance of the return rod, and the return rod limits the extension and contraction direction of the return spring.

[0008] Preferably, the second shock-absorbing assembly includes an inner guard ring and a mounting frame. The inner guard ring is arranged inside the guard ring and is rotatably installed inside the guard ring. The inner side of the inner guard ring is fixedly connected to the mounting frame. Multiple cable installation areas are arranged inside the mounting frame. The fixed rod ends of multiple third dampers are fixedly connected inside the mounting frame. The piston rod end of each third damper is fixedly connected to the cable ring frame.

[0009] Preferably, the friction assembly includes a slide rail and a cable guard ring. The slide rail is arranged on the inner side of the cable ring frame in the second shock-absorbing assembly. The movable frame is slidably installed in the slide rail. One side of the movable frame is fixedly connected to the cable guard ring. The movable frame moves up and down in the slide rail to adjust its position. The roller is rotatably installed in the cable guard ring. The surface of the roller is in contact with the cable skin. A protrusion is provided on the surface of the roller. The protrusion increases the friction between the roller and the cable skin.

[0010] Preferably, each cable loop is connected to four third dampers and is installed in a cable installation area. The four third dampers reduce vibration forces from multiple directions.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention combines the first shock-absorbing component and the second shock-absorbing component to reduce the vibration forces in different directions on the cable. Even when the tower and the wind turbine generator set shake, the vibration of the cable is greatly reduced, thereby improving the stability of the cable itself and the stability of the interface.

[0012] 2. The present invention adopts a friction component at the part in contact with the cable to replace the direct contact between the traditional cable fixing device and the cable, thereby reducing the friction force on the cable surface, improving the safety of the cable, and reducing the possibility of safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the top view of the structure of the present invention; Figure 3 This is a schematic diagram of the installation structure of the shock-absorbing slider of the present invention; Figure 4 This is a schematic diagram of the inner retaining ring installation structure of the present invention; Figure 5 It is a schematic diagram of the cable coil structure of the present invention; Figure 6 It is a schematic structural diagram of the friction assembly of the present invention.

[0014] In the figure: 1. Ladder, 101. First support rod, 102. Second support rod, 2. First shock-absorbing assembly, 201. Slider, 202. First damper, 203. Guard ring, 204. Second damper, 205. Third support rod, 206. Return spring, 207. Return rod, 3. Second shock-absorbing assembly, 301. Inner guard ring, 302. Mounting frame, 303. Third damper, 304. Cable ring frame, 4. Friction assembly, 401. Slide rail, 402. Moving frame, 403. Cable guard ring, 404. Roller. DETAILED DESCRIPTION

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] See also Figure 1-6 , the present invention provides a technical solution: In order to realize the multi-directional shock absorption and low friction functions of the present device, a cable protection device for a wind turbine is proposed, including a ladder 1, which is arranged in the tower of the wind turbine. The ladder 1 is fixedly connected to one end of a first support rod 101 and a second support rod 102, and the other end side of the first support rod 101 is fixedly connected to the other end of the second support rod 102. It also includes a first shock-absorbing component 2, a second shock-absorbing component 3, and a friction component 4. The first shock-absorbing component 2 is arranged on the first support rod 101 and the second support rod 102. The first shock-absorbing component 2 reduces the vibration force of the cable in the same direction as the wind direction. The second shock-absorbing component 3 is arranged in the first shock-absorbing component 2. The second shock-absorbing component 3 reduces the vibration force of the cable in the same direction and tangential direction of the wind direction. The friction component 4 is arranged in the second shock-absorbing component 3. The friction component 4 reduces the friction force on the outer skin of the cable when it is extended or shortened.

[0017] The first shock-absorbing assembly 2 includes a shock-absorbing slider 201 and a first damper 202. The interior of the shock-absorbing slider 201 is hollow and a pulley is provided inside. A slide groove is provided on the first support rod 101. The shock-absorbing slider 201 is sleeved on the end of the first support rod 101 and is slidably connected. The piston rod end of the first damper 202 is fixedly connected inside the shock-absorbing slider 201. The fixed rod end of the first damper 202 is fixedly connected to the end of the first support rod 101 that penetrates into the interior of the shock-absorbing slider 201. The outer side of the end of the first support rod 101 is fixedly connected to one end of the second support rod 102. The connection point between the second support rod 102 and the first support rod 101 can limit the moving distance of the shock-absorbing slider 201. The first damper 202 adopts an existing hydraulic damper. The outer surface of the shock-absorbing slider 201 is fixedly connected to the retaining ring 203. The piston rod end of the second damper 204 is fixedly connected to the retaining ring 203, and the fixed end of the second damper 204 is fixedly connected to one side of the third support rod 205. The third support rod 205 is fixedly connected to the first support rod 101. One end of the return spring 206 is fixedly connected to the third support rod 205, and the other end of the return spring 206 is fixedly connected to the retaining ring 203. A return rod 207 is sleeved in the middle of the return spring 206. One end of the return rod 207 is fixedly connected to the retaining ring 203, and the other end is slidably connected to pass through the other side of the third support rod 205. A limit block is set on the other end of the retaining ring 203, and the limit block limits the moving distance of the return rod 207.

[0018] When the wind turbine generator set or tower is subjected to vibration in the same direction as the wind, the cable will vibrate accordingly. When the cable vibrates, the retaining ring 203 moves, and the shock-absorbing slider 201 moves with the retaining ring 203. Since the position and length of the first support rod 101 do not change, the shock-absorbing slider 201 slides on the first support rod 101. The sliding of the shock-absorbing slider 201 will drive the piston rod of the first damper 202 to shorten or lengthen in the fixed rod. The piston rod of the first damper 202 reduces the vibration degree of the retaining ring 203, and at the same time When the retaining ring 203 moves, the piston rod of the second damper 204 will shorten or lengthen in its fixed rod. The second damper 204 cooperates with the first damper 202 to reduce the vibration of the retaining ring 203. When the second damper 204 shortens or lengthens, the return spring 206 shortens or lengthens, and the return rod 207 moves with the retaining ring 203. When the vibration of the retaining ring 203 gradually decreases, the return spring 206 gradually resets, restoring the retaining ring 203 to its normal position, and the return rod 207 also returns to its normal position at the same time.

[0019] In order to improve the shock absorption capability of the present device, a cable protection device for a wind turbine generator set is proposed, wherein the second shock absorption component 3 includes an inner protective ring 301 and a mounting frame 302. The inner protective ring 301 is arranged in the protective ring 203 and is rotatably installed in the protective ring 203. The inner side of the inner protective ring 301 is fixedly connected to the mounting frame 302. Multiple cable installation areas are arranged in the mounting frame 302. The fixed rod ends of multiple third dampers 303 are fixedly connected in the mounting frame 302. The piston rod end of each third damper 303 is fixedly connected to the cable ring frame 304. Each cable ring frame 304 is equidistantly connected to four third dampers 303 and is installed in a cable installation area. The four third dampers 303 reduce vibration forces from multiple directions.

[0020] When the cable twists with the wind turbine generator set, the inner guard ring 301 can rotate on the guard ring 203, thereby adjusting the position of each cable, reducing the torsional force of the cable, and improving the safety of the cable. When the cable is subjected to a vibration force in the same direction as the wind direction or a vibration force close to the same direction as the wind direction, the third damper 303 expands and contracts to cooperate with the first damper 202 and the second damper 204 outside the guard ring 203 to reduce the vibration force of the cable and improve the stability of the cable. When the cable is subjected to a vibration force tangential to the wind direction, the third damper 303 tangential to the wind direction expands and contracts to reduce the vibration of the cable.

[0021] In order to reduce the friction between the cable and the device, a cable protection device for a wind turbine is proposed, wherein the friction component 4 includes a slide rail 401 and a cable retainer 403. The slide rail 401 is arranged on the inner side of the cable retainer frame 304 in the second shock-absorbing component 3. A movable frame 402 is slidably installed in the slide rail 401. One side of the movable frame 402 is fixedly connected to the cable retainer 403. The movable frame 402 moves up and down in the slide rail 401 to adjust its position. A roller 404 is rotatably installed in the cable retainer 403. The surface of the roller 404 is in contact with the cable skin. A protrusion is provided on the surface of the roller 404. The protrusion increases the friction between the roller 404 and the cable skin.

[0022] The cable is installed in the cable retaining ring 403, and the cable surface is in contact with the roller 404. When the torsion distance of the wind turbine generator set is small or the wind turbine generator set has a small displacement due to vibration, the cable is subjected to a small tension, and the cable will drive the cable retaining ring 403 to move up or down in the slide rail 401. When the torsion distance of the wind turbine generator set is large, the cable retaining ring 403 will reach the top of the slide rail 401 on the slide rail 401, the cable continues to extend, and the roller 404 rotates. The roller 404 reduces the friction between the cable surface and the cable retaining ring 403, thereby protecting the cable surface.

[0023] Working principle: The cable is installed in the cable retaining ring 403. When the cable is subjected to vibration force in the wind direction, the first damper 202 and the second damper 204 and the third damper 303 in the same direction expand and contract simultaneously to reduce the vibration of the device, thereby reducing the vibration of the cable. When the cable is subjected to vibration from the tangential direction of the wind, the third damper 303 in the same direction expands and contracts to reduce the vibration of the cable ring frame 304, thereby reducing the vibration of the cable.

[0024] When the torsion distance of the wind turbine generator set is small or the wind turbine generator set has a small displacement due to vibration, the cable will drive the cable retaining ring 403 to move upward or downward in the slide rail 401. When the torsion distance of the wind turbine generator set is large, the cable retaining ring 403 will reach the top of the slide rail 401 on the slide rail 401, the cable continues to extend, and the roller 404 rotates. The roller 404 reduces the friction between the cable skin and the cable retaining ring 403 to protect the cable skin.

[0025] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A cable protection device for a wind turbine generator set, comprising a ladder (1), wherein the ladder (1) is arranged in a tower of the wind turbine generator set, wherein one end of a first support rod (101) and a second support rod (102) are fixedly connected to the ladder (1), and the other end of the first support rod (101) is fixedly connected to the other end of the second support rod (102), and wherein: The cable further comprises a first shock absorbing component (2), a second shock absorbing component (3), and a friction component (4); the first shock absorbing component (2) is arranged on the first support rod (101) and the second support rod (102); the second shock absorbing component (3) is arranged in the first shock absorbing component (2); the friction component (4) is arranged in the second shock absorbing component (3); the friction component (4) reduces the friction force on the outer skin of the cable when the cable is extended or shortened.

2. A cable protection device for a wind turbine generator set according to claim 1, characterized in that: The first shock-absorbing component (2) includes a shock-absorbing slider (201) and a first damper (202). The interior of the shock-absorbing slider (201) is hollow and a pulley is provided therein. A slide groove is provided on the first support rod (101). The shock-absorbing slider (201) is sleeved on the end of the first support rod (101) and is slidably connected. The piston rod end of the first damper (202) is fixedly connected inside the shock-absorbing slider (201). The fixed rod end of the first damper (202) is fixedly connected to the end of the first support rod (101) that is inserted into the interior of the shock-absorbing slider (201). The outer side of the end of the first support rod (101) is fixedly connected to one end of the second support rod (102). The outer surface of the shock-absorbing slider (201) is fixedly connected to the retaining ring (203). The retaining ring (203) is fixedly connected to the piston rod end of the second damper (204), the fixed end of the second damper (204) is fixedly connected to one side of the third support rod (205), the third support rod (205) is fixedly connected to the first support rod (201), one end of the return spring (206) is fixedly connected to the third support rod (205), the other end of the return spring (206) is fixedly connected to the retaining ring (203), and a return rod (207) is sleeved in the middle of the return spring (206), one end of the return rod (207) is fixedly connected to the retaining ring (203), and the other end is slidably connected to pass through the other side of the third support rod (205), and a limit block is provided on the other end of the retaining ring (203), the limit block limits the moving distance of the return rod (207), and the return rod (207) limits the telescopic direction of the return spring (206).

3. The cable protection device for a wind turbine generator set according to claim 1, characterized in that: The second shock-absorbing assembly comprises an inner guard ring (301) and a mounting frame (302). The inner guard ring (301) is arranged in the guard ring (203) and is rotatably mounted in the guard ring (203). The inner side of the inner guard ring (301) is fixedly connected to the mounting frame (302). A plurality of cable installation areas are arranged in the mounting frame (302). The fixed rod ends of a plurality of third dampers (303) are fixedly connected in the mounting frame (302). The piston rod end of each third damper (303) is fixedly connected to the cable ring frame (304).

4. A cable protection device for a wind turbine generator set according to claim 3, characterized in that: The friction assembly (4) comprises a slide rail (401) and a cable retainer (403). The slide rail (401) is arranged inside the cable ring frame (304) in the second shock-absorbing assembly. A movable frame (402) is slidably installed in the slide rail (401). One side of the movable frame (402) is fixedly connected to the cable retainer (403). The movable frame (402) moves up and down in the slide rail (401) to adjust its position. A roller (404) is rotatably installed in the cable retainer (403). The surface of the roller (404) is in contact with the cable skin. A protrusion is provided on the surface of the roller (404). The protrusion increases the friction between the roller (404) and the cable skin.

5. The cable protection device for a wind turbine generator set according to claim 3, characterized in that: Each of the cable loops (304) is correspondingly connected to four third dampers (303) and is installed in a cable installation area. The four third dampers (303) reduce vibration forces from multiple directions.

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