A wind turbine yaw encoder fixture having relative elasticity

Abstract

The utility model relates to wind power equipment technical field, specific for a kind of wind turbine yaw encoder fixing device with relative elasticity, including fixed frame, fixed frame is vertically connected horizontal plate and vertical plate, horizontal plate and vertical plate are made using steel spring leaf;Vertical plate is provided with mounting plate, mounting plate is fixedly provided with clamp;Horizontal plate is fixedly connected with rack through fixed structure, hydraulic damping device is provided on fixed structure;Mounting plate and fixing device are respectively slidingly connected with vertical plate and horizontal plate;The utility model adopts steel spring leaf and hydraulic damping device to buffer and absorb vibration, corresponding speed is fast, can make vibration caused by sudden change of wind or start-stop machine during the operation of wind turbine to be fully buffered, and vibration mechanical energy can also be converted into heat energy and dissipated by hydraulic damping device, thereby avoid yaw encoder to be damaged or influence reading accuracy by vibration, thereby ensure the stable operation of wind turbine.

Description

Technical Field

[0001] This utility model relates to the field of wind power equipment technology, specifically a wind turbine yaw encoder fixing device with relative elasticity. Background Technology

[0002] During wind turbine operation, it is necessary to measure the wind direction in real time and align the blades with the wind direction to maintain maximum power generation. Adjusting the direction of the turbine head is achieved through the yaw system. The yaw encoder is a crucial component of the wind turbine's yaw system. It measures the yaw angle of the wind turbine by meshing with a yaw gear. When the yaw encoder detects excessive rotation of the turbine head in one direction, it prevents the yaw motor from further rotating the turbine head in that direction and instead rotates it in another direction to the target angle. This avoids problems such as cable tangling caused by excessive rotation of the wind turbine head in one direction. Currently, yaw encoders are typically installed using rigid connection fixing devices, such as bolts or clips directly fixing the encoder to the yaw system. Common connection methods include rigid mounting brackets or simple spring washers, designed to reduce loosening. However, current research indicates that these connection methods have the following drawbacks: Insufficient buffering: Existing fixed devices mostly use rigid materials and lack effective elastic compensation mechanisms. As a result, during wind turbine operation, vibrations and shocks from the yaw system (such as gear meshing vibrations caused by wind speed changes) are directly transmitted to the encoder, causing encoder reading errors or damage. For example, rigid fixing is prone to stress concentration, which shortens the encoder's lifespan.

[0003] Poor adjustability: Existing technology is inconvenient to adjust, often relying on manual adjustment screws, lacking fine-tuning function, resulting in inaccurate engagement between the encoder and yaw gear, affecting the accuracy of yaw angle measurement.

[0004] Low reliability: Due to the harsh environment of wind farms (such as temperature fluctuations and dust), existing fixed devices are prone to loosening, which in turn leads to encoder displacement and affects the stability of the entire yaw control system. Utility Model Content

[0005] The purpose of this invention is to provide a wind turbine yaw encoder fixing device with relative elasticity to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A wind turbine yaw encoder fixing device with relative elasticity includes a fixing frame, the fixing frame including a horizontal plate, and a vertical plate fixedly connected to one end of the horizontal plate; a mounting plate is provided on the vertical plate, and a clamp is fixedly provided on the mounting plate; a fixing structure is provided on the horizontal plate, and a hydraulic damping device is provided on the fixing structure; both the horizontal plate and the vertical plate are made of steel spring sheets, the mounting plate and the vertical plate are slidably connected, and the fixing device and the horizontal plate are slidably connected.

[0007] Preferably, the fixing structure includes a vertically arranged screw, a horizontal adjustment groove is provided on the horizontal plate, and the screw passes through the horizontal adjustment groove; a pair of nuts are fitted on the screw, and the pair of nuts are respectively provided on the upper and lower sides of the horizontal plate.

[0008] Preferably, the hydraulic damping device includes a hydraulic cylinder, the movable end of which is connected to a piston baffle; the hydraulic damping device is disposed between a pair of nuts.

[0009] Preferably, the screw passes through the mounting hole reserved on the bracket of the machine base, and the bracket of the machine base is located between a pair of nuts; the hydraulic damping device is sleeved on the outside of the screw, the hydraulic cylinder of the hydraulic damping device is in contact with the horizontal plate, and the piston baffle and the nut are clamped on both sides of the bracket of the machine base.

[0010] Preferably, a screw is vertically arranged on the mounting plate, and a vertical adjustment groove that cooperates with the screw is provided on the vertical plate; the screw passes through the vertical adjustment groove, and a nut is sleeved on the screw, with the nut and the mounting plate clamped on both sides of the vertical plate.

[0011] Preferably, the clamp is one or more combinations of jaws, latches, suction cups, clamping pliers, or clamping plates.

[0012] The beneficial effects of this utility model are: The main body of this utility model is made of steel spring sheet, which can provide relative elasticity and form a flexible connection between the active and driven parts. Compared with the rigid connection method used in the prior art, this connection method can absorb the vibration energy generated in the yaw system, reduce the impact damage of the yaw encoder, extend the service life of the encoder, and improve the stability of the reading.

[0013] This invention incorporates a hydraulic damping device, which forms a buffer damping between the frame and the fixed frame through a hydraulic cylinder, thereby preventing resonance. When the yaw system experiences a momentary impact (such as a sudden change in wind speed), the hydraulic damping device can quickly lock in within a very short response time, converting vibration energy into heat dissipation, thus preventing resonance from being transmitted to the yaw encoder. Furthermore, by adjusting the pressure of the hydraulic cylinder and hydraulic valve, it can be adapted to different wind farm conditions (such as high wind speed areas or areas with high turbulence intensity), exhibiting better environmental adaptability and universality.

[0014] This invention features an adjustable structure. Through vertical and horizontal adjustment slots and screw nuts, the position of the clamp can be precisely fine-tuned, ensuring the meshing accuracy between the yaw encoder and the yaw gear, thereby reducing measurement errors. It can also cope with the thermal expansion and contraction of materials caused by large environmental temperature differences. Combined with elastic linkage, it avoids hard impacts and remains firmly fixed during wind turbine start-up and shutdown, effectively improving system reliability, reducing turbine failure rate, and ensuring smooth and stable operation of the wind turbine. Testing shows that using this invention as a fixing device for the yaw encoder can extend the yaw encoder's lifespan by approximately 20% and improve reading stability; system reliability is improved, and the overall failure rate is reduced by more than 15%. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the fixing frame structure of this utility model; Figure 3 This is a schematic diagram of the fixing structure of this utility model; Figure 4 This is a schematic diagram of the fitting structure of the fixing frame and clamp of this utility model; Figure 5 This is a diagram showing the usage state of this utility model.

[0016] In the diagram: 1. Horizontal plate; 2. Vertical plate; 3. Horizontal adjustment groove; 4. Vertical adjustment groove; 5. Mounting plate; 6. Clamp; 7. Screw; 8. Nut; 9. Hydraulic damping device; 10. Hydraulic cylinder; 11. Piston baffle; 12. Frame; 13. Yaw gear; 14. Yaw motor; 15. Yaw encoder. Detailed Implementation

[0017] The following is a further explanation of the present invention in conjunction with specific embodiments, such as... Figure 1 As shown, it includes an L-shaped fixing frame, which is composed of a horizontal plate 1 and a vertical plate 2 fixedly connected together. Both the horizontal plate 1 and the fixing plate 2 are made of steel spring sheets and have good elasticity.

[0018] like Figure 2 As shown, a horizontal adjustment groove 3 is provided on the horizontal plate 1, and a vertical adjustment groove 4 is provided on the vertical plate 2; both the horizontal adjustment groove 3 and the vertical adjustment groove 4 are through groove structures. A fixing structure for connecting the fixing frame and the frame 12 is provided on the horizontal adjustment groove 3, and a clamp 6 for clamping the yaw encoder 15 is provided on the vertical adjustment groove 4.

[0019] like Figure 3As shown, the fixing structure includes a vertically arranged screw 7, on which a pair of nuts 8 are screwed. A hydraulic damping device 9 is sandwiched between the pair of nuts 8. The hydraulic damping device 9 has a threaded through hole in its middle, which can be screwed onto the screw 7. The hydraulic damping device 9 includes a hydraulic cylinder 10 and a piston baffle 11. The hydraulic cylinder 10 has a hydraulic chamber filled with liquid. When the piston baffle 11 is subjected to impact force, the mechanical energy transmitted can be converted into heat energy and dissipated by compressing the liquid inside the hydraulic chamber, thereby preventing the fixing frame from being impacted. Vibration; the hydraulic cylinder 10 controls its internal pressure through a hydraulic valve (not shown in the figure). The pressure of the hydraulic cylinder 10 can be adjusted by the hydraulic valve (ranging from 20-160 bar), thereby changing the response performance and buffering capacity of the hydraulic cylinder 10 to adapt to the working conditions of different wind farms; the bottom of the hydraulic cylinder 10 and the nut 8 below it are clamped on the upper and lower sides of the horizontal plate 1 to achieve the fixed clamping of the horizontal plate 1; while the top of the piston baffle 11 and the nut 8 above it are clamped on both sides of the frame 12, realizing the fixed connection between the fixed frame and the frame 12.

[0020] like Figure 4 As shown, the clamp 6 is fixedly installed on a mounting plate 5. The mounting plate 5 has vertical protrusions at both ends, which can clamp the two sides of the vertical plate 2, allowing the mounting plate 5 to slide in the vertical direction of the vertical plate 2 without rotating. A screw 7 is fixedly installed on the inner side of the mounting plate 5, and a nut 8 is screwed onto the screw 7. The screw 7 passes through the vertical adjustment groove 4, and the nut 8 cooperates with the mounting plate 5 to clamp the vertical plate 2 therein, thereby fixing the mounting plate 5.

[0021] The clamp 6 can be of different types depending on the shape of the yaw encoder 15 to be clamped. In this embodiment, a flat yaw encoder 12 with a cylindrical shape is used, so a flexible ring-shaped clamp is adopted. In actual use, it can be replaced with a vacuum suction cup, clamping pliers, clamping plate or other types of clamps as needed to ensure that the yaw encoder 12 is firmly fixed.

[0022] In actual use, this embodiment, such as Figure 5 As shown, the mounting bracket needs to be fixedly installed on the frame 12 using a fixing structure. First, a nut 8 and a hydraulic cylinder 10 are used to fix the horizontal plate 1 onto the screw 7, so that the screw 7 passes through the horizontal adjustment groove 3. Then, a second nut 8 is used to cooperate with the piston baffle 11 to fix the screw 7 onto the connecting plate set on the frame 12. Next, the mounting plate 5 is slidably fitted onto the vertical plate 2, and the screw 7 connected to it passes through the vertical adjustment groove 4, and the mounting plate 5 is fixed with a nut. Finally, the yaw encoder 15 is fixed by the clamp 6.

[0023] After completing the mounting bracket setup and installing the yaw encoder 15, the position of the yaw encoder 15 needs to be adjusted. By loosening the nut 8 located at the bottom of the fixing structure, the horizontal plate 1 can rotate horizontally around the position of the screw 7, and the screw 7 can also slide within the horizontal adjustment groove 3. Loosening the nut 8 on the screw 7 of the mounting plate 5 allows the mounting plate 5 to move up and down along the vertical adjustment groove 4. After these adjustments, when the gear of the yaw encoder 15 meshes with the yaw gear 13, the loosened nut 8 can be tightened again to complete the position adjustment and fixing of the yaw encoder 15. During wind turbine operation... When the direction of the turbine needs to be adjusted according to changes in wind direction, the yaw motor 14 drives the frame 12 to rotate on the yaw gear 13. At this time, the yaw encoder 15 can synchronously measure the angle of the turbine's yaw, thereby avoiding problems such as excessive rotation of the turbine in the same direction, which could lead to cable entanglement. During the operation of the yaw system of the wind turbine, when sudden changes in wind speed occur or large vibrations occur during start-up and shutdown, the yaw encoder fixing device in this embodiment can absorb the mechanical energy generated by the vibration through the fixing frame made of steel spring plates and the hydraulic damping device 9, thereby preventing the yaw encoder 15 from being damaged by vibration or affecting the accuracy and stability of the reading.

[0024] The above description is merely a further explanation of the present utility model in conjunction with specific embodiments. All descriptions made do not imply any limitation on the protection scope of the present utility model. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be determined by the protection scope of the claims.

Claims

1. A wind turbine yaw encoder fixing device with relative elasticity, comprising a fixing frame, characterized in that: The fixing frame includes a horizontal plate, one end of which is fixedly and vertically connected to a vertical plate; a mounting plate is provided on the vertical plate, and a clamp is fixedly provided on the mounting plate; a fixing structure is provided on the horizontal plate, and a hydraulic damping device is provided on the fixing structure; both the horizontal plate and the vertical plate are made of steel spring sheets, the mounting plate and the vertical plate are slidably connected, and the fixing device and the horizontal plate are slidably connected.

2. The wind turbine yaw encoder fixing device with relative elasticity according to claim 1, characterized in that: The fixing structure includes a vertically arranged screw rod, and a horizontal adjustment groove is provided on the horizontal plate. The screw rod passes through the horizontal adjustment groove. A pair of nuts are fitted on the screw rod, and the pair of nuts are respectively located on the upper and lower sides of the horizontal plate.

3. The wind turbine yaw encoder fixing device with relative elasticity according to claim 2, characterized in that: The hydraulic damping device includes a hydraulic cylinder, and the movable end of the hydraulic cylinder is connected to a piston baffle; the hydraulic damping device is disposed between a pair of nuts.

4. The wind turbine yaw encoder fixing device with relative elasticity according to claim 2, characterized in that: The screw passes through the mounting hole reserved on the bracket of the machine base, and the bracket of the machine base is located between a pair of nuts; the hydraulic damping device is sleeved on the outside of the screw, the hydraulic cylinder of the hydraulic damping device is in contact with the horizontal plate, and the piston baffle and the nut are clamped on both sides of the bracket of the machine base.

5. The wind turbine yaw encoder fixing device with relative elasticity according to claim 4, characterized in that: A screw is vertically mounted on the mounting plate, and a vertical adjustment groove is provided on the vertical plate to cooperate with the screw. The screw passes through the vertical adjustment groove, and a nut is fitted on the screw. The nut and the mounting plate are clamped on both sides of the vertical plate.

6. The wind turbine yaw encoder fixing device with relative elasticity according to claim 1, characterized in that: The clamp is one or more combinations of jaws, latches, suction cups, clamping pliers, or clamping plates.

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