A cable torsion protection device and method for yaw system of wind turbine generator set

Abstract

This invention relates to the field of wind turbine technology and discloses a torsion cable protection device and method for a wind turbine yaw system. The device includes a tower body and a torsion cable, and further includes: support frames fixed to both sides of the tower body; limit frames fixedly connected between opposite sides of the two support frames; connecting plates respectively provided between opposite sides of the two limit frames; fixing plates fixedly connected to the front and rear sides of one side of each connecting plate; and dampers fixedly connected between opposite sides of each fixing plate. The device extends through a limiting hole on a positioning ring into the interior of an annular protective shell. When the torsion cable shakes slightly, it presses against two protective rings inside the annular protective shell. The force on the protective rings drives the limiting rod, causing the limiting ring to stretch a second spring to protect the torsion cable. This maintains a certain amount of clearance in the limiting space, ensuring that the cable is not forcibly fixed in one position, reducing damage caused by friction and concentrated torque.

Description

Technical Field

[0001] This invention relates to the field of wind turbine technology, specifically to a cable torsion protection device and method for the yaw system of a wind turbine generator set. Background Technology

[0002] Wind turbines convert clean, pollution-free wind energy into electrical energy. The wind turbine is the energy capture device, converting wind energy into rotational mechanical kinetic energy, which is then transmitted to the generator via a transmission chain. The generator converts this rotational kinetic energy into electrical energy. For horizontal-axis wind turbines, the generator or nacelle is located behind the turbine. In doubly-fed induction generators, the generator is installed inside the nacelle and connected to the turbine via a transmission chain. Due to the large diameter of the turbine and the need to capture high-quality wind energy from high altitudes, the turbine, generator, and nacelle are all mounted on a high tower. The electrical energy generated by the generator is transmitted downwards along the tower via cables. Because wind direction is unpredictable, wind turbines must be constantly aligned with the wind direction to capture as much wind energy as possible. Therefore, the turbine and nacelle need to rotate relative to the tower to align with the wind. This inevitably causes the cables descending from the nacelle along the tower to twist. To protect the cables from breakage, engineers have designed twisted cables.

[0003] Due to the complex and variable wind conditions, the wind turbine operates under swaying conditions. The torsion cable inside the wind turbine, suspended within the tower, swings with the turbine's movement. Therefore, without limit protection for the torsion cable, it may collide with other components inside the tower, leading to its breakage. Existing torsion cable protection devices generally limit the cable's movement, but these devices only restrict its vertical movement and do not provide buffering protection or fine-tuning of the cable angle. In environments with significant fluctuations in wind speed and direction, devices lacking buffering and adaptive adjustment may not effectively mitigate sudden pressure fluctuations. This could result in the cable bearing excessive or insufficient loads, affecting the overall system performance. Protection devices without buffering and adaptive adjustment may lead to unpredictable failures. For example, without proper floating and adjustment, the cable may suddenly break or be damaged due to excessive twisting or tension issues. Summary of the Invention

[0004] The summary section of this invention provides a brief overview of the concepts, which will be described in detail in the detailed description section that follows. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0005] The purpose of this invention is to provide a cable torsion protection device and method for the yaw system of a wind turbine generator set, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a torsion cable protection device for a wind turbine generator yaw system, comprising a tower body and a torsion cable, and further comprising:

[0007] Support frames are fixed to both sides of the tower body. Limit frames are fixedly connected between opposite sides of the two support frames. Connecting plates are provided between opposite sides of the two limit frames. Fixing plates are fixedly connected to the front and rear sides of one side of the connecting plate. Dampers are fixedly connected between opposite sides of the two fixing plates. Fixing frames are fixedly connected between opposite sides of the two dampers.

[0008] The positioning blocks are fixed inside the fixed frame. Positioning plates are fixedly connected between opposite sides of the two positioning blocks. Positioning rings are fixedly connected between opposite sides of the two positioning plates. Multiple limiting holes are opened in the annular array inside the positioning rings. An annular protective shell is fixedly connected to the top of the positioning rings. A buffer is provided inside the annular protective shell. The buffer includes a protective ring. A floating component is provided inside the limiting frame. The floating component includes a semi-arc groove and a fixing rod.

[0009] Preferably, the top and bottom of the positioning ring are fixedly connected to extension rods, and the opposite sides of the two extension rods are fixedly connected to retaining rings for auxiliary positioning of the torsion bar.

[0010] Preferably, a reinforcing block is fixedly connected to the top and bottom of one side of the support frame, and one side of the reinforcing block is fixedly connected to the limiting frame.

[0011] Preferably, a slider is fixedly connected to the bottom of the fixed frame, and a slide rail for use with the slider is fixedly connected to the bottom between the two fixed plates on opposite sides.

[0012] Preferably, a first spring is fixedly connected to one side of the fixing plate, and one side of the first spring is fixedly connected to the fixing frame.

[0013] Preferably, a reinforcing rib is fixedly connected to one side of the fixing plate, and one side of the reinforcing rib is fixedly connected to the connecting plate.

[0014] Preferably, the protective ring is disposed on both sides inside the annular protective shell, a limiting rod is fixedly connected to one side of the protective ring, one side of the limiting rod extends to the outside of the annular protective shell and is fixedly connected to a limiting ring, and a second spring is fixedly connected between one side of the limiting ring and the annular protective shell.

[0015] Preferably, the semi-circular groove is formed on both sides inside the limiting frame, the retaining rod is fixed to the front and rear sides of one side of the connecting plate, one end of the retaining rod extends to the outside of the semi-circular groove, the top and bottom of the inner cavity of the semi-circular groove are respectively slidably connected with retaining rings for limiting and retaining the rod, one side of the retaining ring is fixedly connected with a sliding rod, the end of the sliding rod away from the retaining ring extends to the outside of the semi-circular groove, the surface of the sliding rod is fitted with a limiting frame, one side of the limiting frame is fixedly connected to the limiting frame, and one side of the retaining ring is fixedly connected to the limiting frame with a third spring.

[0016] Preferably, the end of the retaining rod away from the connecting plate is fixedly connected to a connecting ring, and the end of the sliding rod away from the retaining ring is fixedly connected to a retaining ring.

[0017] The present invention also provides a method for protecting the torsion cable of the yaw system of a wind turbine generator, comprising the following steps:

[0018] Step a: First, the torsion band passes through the limiting hole on the positioning ring into the interior of the annular protective shell. When the torsion band shakes slightly, it will press against the two protective rings inside the annular protective shell. The force on the protective rings will drive the limiting rod and cause the limiting ring to stretch the second spring to protect the torsion band, so that the limiting space retains a certain amount of frame.

[0019] Step b: If the swing amplitude of the torsion ring is large, the positioning ring will be forced to push the positioning plate, positioning block and fixed frame against the two dampers, and in conjunction with the dampers and the first spring, float back and forth between the fixed plate and the fixed frame to buffer the movement.

[0020] Step c: When the angle of the torsion swing is large, the fixing plate will drive the retaining rod to limit the cable with a certain tilt angle inside the semi-circular groove. In conjunction with the retaining ring and the sliding rod, the third spring will be squeezed and buffered between the limiting frame, so as to better balance the cable force.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] In this invention, the cable first passes through the limiting hole on the positioning ring into the interior of the annular protective shell. When the cable shakes slightly, it will press against the two protective rings inside the annular protective shell. The force on the protective rings will drive the limiting rod and cause the limiting ring to stretch the second spring to protect the cable, thus maintaining a certain amount of space in the limiting area. If the cable shakes more, the positioning ring will be forced to push the positioning plate, positioning block and fixing frame against the two dampers. In conjunction with the dampers and the first spring, the cable will float back and forth between the fixing plate and the fixing frame to buffer the movement, thereby ensuring that the cable is not forcibly fixed in one position and reducing damage caused by friction and torque concentration. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the cable torsion protection device for the yaw system of a wind turbine generator provided by the present invention;

[0025] Figure 2 This is a schematic diagram of the structure from a bottom view provided by the present invention;

[0026] Figure 3 This is a top view structural diagram provided by the present invention;

[0027] Figure 4 Provided by the present invention Figure 3 Enlarged structural diagram at point A in the middle;

[0028] Figure 5 This is a partial structural schematic diagram provided by the present invention;

[0029] Figure 6 This is a schematic diagram of the cross-sectional structure of the slide rail provided by the present invention;

[0030] Figure 7 This is a schematic diagram of the floating component structure provided by the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Tower body; 2. Torsion bracket; 3. Support frame; 4. Limiting frame; 5. Connecting plate; 6. Fixing plate; 7. Damper; 8. Fixing frame; 9. Positioning block; 10. Positioning plate; 11. Positioning ring; 12. Limiting hole; 13. Annular protective shell; 14. Buffer component; 1401. Protective ring; 1402. Limiting rod; 1403. Limiting ring; 1404. Second spring; 15. Floating component; 1501. Semi-arc groove; 1502. Fixing rod; 1503. Snap ring; 1504. Sliding rod; 1505. Limiting frame; 1506. Third spring; 1507. Connecting ring; 1508. Fixing ring; 16. Extension rod; 17. Fixing ring; 18. Reinforcing block; 19. Sliding block; 20. Slide rail; 21. First spring; 22. Reinforcing rib. Detailed Implementation

[0033] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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 limiting this invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] Please see Figures 1-7 As shown, a torsion cable protection device for a wind turbine generator yaw system includes a tower body 1 and a torsion cable 2, and further includes: support frames 3 fixed to both sides of the tower body 1. The Y-shaped support frames 3 can improve the support strength of the limiting frame 4. The limiting frame 4 is fixedly connected between the opposite sides of the two support frames 3, which facilitates the movement of the limiting connecting plate 5. The connecting plate 5 is fixed to the fixing plate 6, which facilitates the fixing of the damper 7. The connecting plate 5 is provided between the opposite sides of the two limiting frames 4. The front and rear sides of one side of the connecting plate 5 are fixedly connected to the fixing plate 6. The damper 7 is fixedly connected between the opposite sides of the two fixing plates 6. The damper 7 can buffer the movement of the fixing frame 8. The fixing frame 8 is fixedly connected between the opposite sides of the two dampers 7.

[0038] The positioning block 9, fixed inside the fixed frame 8, along with the positioning plate 10 and the positioning ring 11, allows the positioning ring 11 to cause the fixed frame 8 to move and, in conjunction with the damper 7, buffer the floating motion when the frame 8 shakes. Positioning plates 10 are fixedly connected between opposite sides of the two positioning blocks 9, and positioning rings 11 are fixedly connected between opposite sides of the two positioning plates 10. Multiple limiting holes 12 are formed in a ring array inside the positioning ring 11. These limiting holes 12, in conjunction with the annular protective shell 13, facilitate the limiting of the torsion beam 2, preventing large-scale swaying of the torsion beam 2 from damaging other internal components of the tower body 1. The top of the positioning ring 11 is fixedly connected to an annular protective shell 13. The annular protective shell 13 is provided with a buffer 14 inside. The buffer 14 includes a protective ring 1401. The limit frame 4 is provided with a floating component 15 inside. By setting the floating component 15, the positioning ring 11 can make a small radius amplitude, which can improve the limit of the torsion band 2, and also ensure that the torsion band 2 floats within a certain frame range. The angle fine adjustment and floating can ensure that the cable is not forcibly fixed in a certain position, thereby reducing the damage caused by friction and torque concentration. The floating component 15 includes a semi-arc groove 1501 and a fixing rod 1502.

[0039] The top and bottom of the positioning ring 11 are fixedly connected to extension rods 16. The extension rods 16, in conjunction with the retaining rings 17, can assist in limiting the torsion band 2. The two extension rods 16 are fixedly connected to retaining rings 17 on opposite sides for assisting in limiting the torsion band 2. The top and bottom of one side of the support frame 3 are fixedly connected to reinforcing blocks 18. The connection strength between the support frame 3 and the fixed frame 8 can be improved by fixing the reinforcing blocks 18 to the limiting frame 4. One side of the reinforcing blocks 18 is fixedly connected to the limiting frame 4. The bottom of the fixed frame 8 is fixedly connected to a slider 19. The bottom of the two fixed plates 6 on opposite sides is fixedly connected to a slide rail 20 for use with the slider 19. By sliding the slider 19 and the slide rail 20, and with the slide rail 20 fixed between the two fixed plates 6, the support strength of the damper 7 can be reduced, and the fixed frame 8 can move against the slider 19 inside the slide rail 20 to improve the strength between the fixed plate 6, the damper 7, and the fixed frame 8.

[0040] A first spring 21 is fixedly connected to one side of the fixed plate 6. One side of the first spring 21 is fixedly connected to the fixed frame 8. By fixing the first spring 21 between the fixed plate 6 and the fixed frame 8, the frame between the fixed plate 6 and the fixed frame 8 can be buffered to prevent floating. A reinforcing rib 22 is fixedly connected to one side of the fixed plate 6. By fixing the reinforcing rib 22 to the connecting plate 5 and the fixed plate 6, the connection strength between the fixed plate 6 and the connecting plate 5 can be improved. One side of the reinforcing rib 22 is fixedly connected to the connecting plate 5.

[0041] The protective rings 1401 are disposed on both sides inside the annular protective shell 13. One side of the protective ring 1401 is fixedly connected to the limiting rod 1402. One side of the limiting rod 1402 extends to the outside of the annular protective shell 13 and is fixedly connected to the limiting ring 1403. With the two protective rings 1401 disposed inside the annular protective shell 13, when the torsion band 2 shakes, it will press against the protective ring 1401. At this time, the protective ring 1401 will be forced to drive the limiting rod 1402 and drive the limiting ring 1403 to stretch the second spring 1404 for buffering and protection of the torsion band 2. One side of the limiting ring 1403 is fixedly connected to the annular protective shell 13 with the second spring 1404.

[0042] A semi-circular slot 1501 is formed on both sides inside the limiting frame 4. A retaining rod 1502 is fixed to the front and rear sides of one side of the connecting plate 5. One end of the retaining rod 1502 extends through to the outside of the semi-circular slot 1501. The top and bottom of the inner cavity of the semi-circular slot 1501 are respectively slidably connected with retaining rings 1503 for limiting the retaining rod 1502. A sliding rod 1504 is fixedly connected to one side of the retaining ring 1503. The end of the sliding rod 1504 away from the retaining ring 1503 extends through to the outside of the semi-circular slot 1501. When the torsion bar 2 swings at a large angle, the fixing plate 6 will drive the retaining rod 1502 inside the semi-circular slot 1501 with a certain tilt angle, and cooperate with the retaining ring 1503 and the sliding rod 1504 to make the third spring Cable 1506 is compressed and buffered between the limiting brackets 1505, thereby better balancing the force on the cable. The limiting brackets 1505 are fitted on the surface of the slide rod 1504. One side of the limiting bracket 1505 is fixedly connected to the limiting frame 4. A third spring 1506 is fixedly connected between one side of the retaining ring 1503 and the limiting bracket 1505. A connecting ring 1507 is fixedly connected to the end of the retaining rod 1502 away from the connecting plate 5. By fixing the retaining rod 1502 with the connecting ring 1507, one end of the retaining rod 1502 can be limited. A fixing ring 1508 is fixedly connected to the end of the slide rod 1504 away from the retaining ring 1503. By fixing the end of the slide rod 1504 with the fixing ring 1508, one end of the slide rod 1504 can be limited.

[0043] The present invention also provides a method for protecting the torsion cable of the yaw system of a wind turbine generator, comprising the following steps:

[0044] Step a: First, the torsion band 2 passes through the limiting hole 12 on the positioning ring 11 into the interior of the annular protective shell 13. When the torsion band 2 shakes slightly, it will press against the two protective rings 1401 inside the annular protective shell 13. The force on the protective rings 1401 will drive the limiting rod 1402 and cause the limiting ring 1403 to stretch the second spring 1404 to protect the torsion band 2, so that the limiting space retains a certain amount of frame.

[0045] Step b: If the swing amplitude of the torsion bar 2 is large, the positioning ring 11 will be forced to push the positioning plate 10, the positioning block 9 and the fixed frame 8 against the two dampers 7, and cooperate with the dampers 7 and the first spring 21 to float back and forth between the fixed plate 6 and the fixed frame 8 for buffering.

[0046] Step c: When the swing angle of the torsion bar 2 is large, the fixing plate 6 will drive the retaining rod 1502 to be limited inside the semi-arc groove 1501 with a certain tilt angle, and cooperate with the retaining ring 1503 and the sliding rod 1504 to make the third spring 1506 squeezed and buffered between the limiting frame 1505, so as to better balance the force on the cable.

[0047] Working principle: First, when the torsion band 2 passes through the limiting hole 12 on the positioning ring 11 into the interior of the annular protective shell 13, and simultaneously passes through the retaining ring 17, when the torsion band 2 shakes, it will first press against the protective ring 1401. At this time, the protective ring 1401 will be forced to drive the limiting rod 1402 and the limiting ring 1403 to stretch the second spring 1404 for buffering and protection of the torsion band 2. If the back-and-forth shaking amplitude is large, the positioning ring 11 will be forced to drive the positioning plate 10, the positioning block 9, and the fixed frame 8 to press against each other between the two dampers 7. When the fixed frame 8 moves, it will drive the slider 19 to move within the slide rail 20 for a limited movement, and cooperate with the damper 7 and the first spring 21 to squeeze between the fixed plate 6 and the fixed frame 8. The pressure buffer, through its buffering effect, can make the cable tension more stable, thereby reducing the risk of cable damage and extending the service life of cables and equipment. If the torsion band 2 swings too much, the fixing plate 6 will drive the fixing rod 1502 to move up and down inside the semi-arc slot 1501 with a certain tilt angle. In conjunction with the retaining ring 1503 and the sliding rod 1504, the third spring 1506 is squeezed between the limiting frame 1505 and squeezes the fixing rod 1502 to buffer, thereby better balancing the cable force and ensuring that the torsion band 2 maintains a certain amplitude within a limited range. Through angle fine adjustment and floating, it can be ensured that the cable is not forcibly fixed in a certain position, thereby reducing the damage caused by friction and torque concentration.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A torsion cable protection device for a wind turbine generator yaw system, comprising a tower body (1) and a torsion cable (2), characterized in that, Also includes: Support frames (3) are fixed on both sides of the tower body (1). Limiting frames (4) are fixedly connected between opposite sides of the two support frames (3). Connecting plates (5) are provided between opposite sides of the two limiting frames (4). Fixing plates (6) are fixedly connected to the front and rear sides of one side of the connecting plate (5). Damperes (7) are fixedly connected between opposite sides of the two fixing plates (6). Fixing frames (8) are fixedly connected between opposite sides of the two dampers (7). Positioning blocks (9) are fixed inside the fixed frame (8). Positioning plates (10) are fixedly connected between opposite sides of the two positioning blocks (9). Positioning rings (11) are fixedly connected between opposite sides of the two positioning plates (10). Multiple limiting holes (12) are opened in the annular array inside the positioning ring (11). An annular protective shell (13) is fixedly connected to the top of the positioning ring (11). A buffer (14) is provided inside the annular protective shell (13). The buffer (14) includes a protective ring (1401). A floating part (15) is provided inside the limiting frame (4). The floating part (15) includes a semi-arc groove (1501) and a fixing rod (1502). The protective ring (1401) is disposed on both sides inside the annular protective shell (13). A limiting rod (1402) is fixedly connected to one side of the protective ring (1401). One side of the limiting rod (1402) extends through to the outside of the annular protective shell (13) and is fixedly connected to a limiting ring (1403). A second spring (1404) is fixedly connected between one side of the limiting ring (1403) and the annular protective shell (13). The semi-circular slot (1501) is opened on both sides inside the limiting frame (4). The retaining rod (1502) is fixed to the front and rear sides of one side of the connecting plate (5). One end of the retaining rod (1502) extends through to the outside of the semi-circular slot (1501). The top and bottom of the inner cavity of the semi-circular slot (1501) are respectively slidably connected with retaining rings (1503) for limiting and retaining the retaining rod (1502). A slide rod (1504) is fixedly connected to one side of the slide rod (1504). The end of the slide rod (1504) away from the retaining ring (1503) extends to the outside of the semi-circular groove (1501). A limiting frame (1505) is fitted on the surface of the slide rod (1504). One side of the limiting frame (1505) is fixedly connected to the limiting frame (4). A third spring (1506) is fixedly connected between one side of the retaining ring (1503) and the limiting frame (1505).

2. The cable torsion protection device for the yaw system of a wind turbine generator set according to claim 1, characterized in that: The top and bottom of the positioning ring (11) are fixedly connected to extension rods (16), and the opposite sides of the two extension rods (16) are fixedly connected to retaining rings (17) used to assist in the limiting torsion bar (2).

3. The cable torsion protection device for the yaw system of a wind turbine generator set according to claim 1, characterized in that: The top and bottom of one side of the support frame (3) are fixedly connected to a reinforcing block (18), and one side of the reinforcing block (18) is fixedly connected to the limiting frame (4).

4. A cable torsion protection device for a wind turbine generator yaw system according to claim 1, characterized in that: The bottom of the fixed frame (8) is fixedly connected to a slider (19), and the bottom of the two fixed plates (6) on opposite sides is fixedly connected to a slide rail (20) that works with the slider (19).

5. A cable torsion protection device for a wind turbine generator yaw system according to claim 1, characterized in that: A first spring (21) is fixedly connected to one side of the fixing plate (6), and one side of the first spring (21) is fixedly connected to the fixing frame (8).

6. A cable torsion protection device for a wind turbine generator yaw system according to claim 1, characterized in that: A reinforcing rib (22) is fixedly connected to one side of the fixing plate (6), and one side of the reinforcing rib (22) is fixedly connected to the connecting plate (5).

7. A cable torsion protection device for a wind turbine generator yaw system according to claim 1, characterized in that: The end of the retaining rod (1502) away from the connecting plate (5) is fixedly connected to a connecting ring (1507), and the end of the sliding rod (1504) away from the retaining ring (1503) is fixedly connected to a retaining ring (1508).

8. A method for using a cable torsion protection device for a wind turbine generator yaw system as described in claim 1 or 7, characterized in that: Includes the following steps: Step a: First, the torsion band (2) passes through the limiting hole (12) on the positioning ring (11) into the interior of the annular protective shell (13). When the torsion band (2) shakes slightly, it will press against the two protective rings (1401) inside the annular protective shell (13). The force on the protective rings (1401) will drive the limiting rod (1402) and cause the limiting ring (1403) to stretch the second spring (1404) to protect the torsion band (2) and keep a certain amount of frame in the limiting space. Step b: If the swing amplitude of the torsion bar (2) is large, the positioning ring (11) will be driven by the force to push the positioning plate (10), the positioning block (9) and the fixed frame (8) against the two dampers (7), and cooperate with the dampers (7) and the first spring (21) to float back and forth between the fixed plate (6) and the fixed frame (8) for buffering; Step c: When the swing angle of the torsion band 2 is large, the fixing plate (6) will drive the retaining rod (1502) to limit the inside of the semi-arc groove (1501) with a certain tilt angle, and cooperate with the retaining ring (1503) and the sliding rod (1504) to make the third spring (1506) squeezed and buffered between the limiting frame (1505), so as to better balance the force on the cable.

Images