Yaw control mechanism for wind power generation

Abstract

The utility model provides a yaw control mechanism for wind power generation, belongs to the technical field of wind power generation, and solves the technical problems that a structure for further limiting the yaw angle does not exist in the prior art, so that a wind turbine possibly deflects excessively under the condition of strong wind, and the structure is damaged or the design load is exceeded. A yaw control mechanism for wind power generation comprises a mounting column and a yaw control frame arranged at the top end of the mounting column, a generator cabin is fixed to the top end of the yaw control frame, a control assembly for correcting the yaw angle is arranged in the yaw control frame, a limiting ring is fixed to the top end of the mounting column, and an annular groove is formed in the bottom face of the yaw control frame. And the annular groove is in sliding fit with the limiting ring. The yaw angle limiting device has the advantages that the yaw angle is further limited, and the situation that the structure is damaged or the design load is exceeded due to the fact that the wind turbine excessively deflects under the strong wind condition is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind power generation and relates to a yaw control mechanism, in particular to a yaw control mechanism for wind power generation. Background Art

[0002] Inaccurate yaw alignment of a wind turbine will significantly impact the turbine's power generation, directly impacting the wind farm's economic benefits. The primary cause of this inaccurate yaw alignment is that the zero direction recorded by the wind direction sensor located on the nacelle is not the actual direction of the turbine's nose. Currently, during maintenance and installation, wind vane zero-position correction is performed using an observational method, relying on the maintenance personnel's intuitive sense to align the zero scale of the wind vane with the direction of the turbine's nose. However, individual differences in perception can easily lead to correction errors, resulting in the zero direction recorded by the sensor being different from the actual direction of the turbine's nose. This results in inaccurate wind alignment, directly reducing the amount of wind energy captured by the turbine and reducing the turbine's power generation, significantly impacting the wind farm's economic benefits.

[0003] A search revealed a Chinese patent document that discloses a continuous yaw control system for a wind turbine [Application Number: 202320527194.5; Publication Number: CN219492462U]. This system, which relates to the technical field of yaw systems, includes: a sensing device for collecting operating parameters of the wind turbine to determine the specified angle at which the cable is to be twisted when the wind turbine yaws; an actuator for causing the cable to twist within a limited angle range; a reset mechanism for causing the actuator to return to its initial position; and a control device. The sensing device, actuator, and reset mechanism are all connected to the control device, which controls the operation of the actuator and reset mechanism based on data from the sensing device. This system enables the wind turbine to yaw continuously, with no restrictions on the yaw angle or direction.

[0004] Although this patent allows the wind turbine to yaw continuously with no restrictions on the yaw angle and direction, the application does not have a structure to further limit the yaw angle, so that the wind turbine may deflect excessively under strong wind conditions, causing structural damage or exceeding the design load. Summary of the Invention

[0005] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose a yaw control mechanism for wind power generation. The technical problem to be solved by the present invention is: how to further limit the yaw angle so as to prevent the wind turbine from excessively deflecting under strong wind conditions, resulting in structural damage or exceeding the design load.

[0006] The purpose of this utility model can be achieved through the following technical solutions:

[0007] A yaw control mechanism for wind power generation comprises a mounting column and a yaw control frame arranged at the top of the mounting column, a generator cabin being fixed to the top of the yaw control frame, a control component for correcting the yaw angle being arranged in the yaw control frame, a limit ring being fixed to the top of the mounting column, an annular groove being provided on the bottom surface of the yaw control frame, the annular groove being slidably engaged with the limit ring, and two pairs of tensioning blocks being slidably connected in the limit ring, the two pairs of tensioning blocks being tensioned and limitedly engaged with the groove wall of the annular groove, and a limit component for controlling the tensioning degree of the two pairs of tensioning blocks being arranged at the top of the mounting column.

[0008] The working principle of the utility model is that the yaw angle can be corrected by the control component, thereby controlling the main shaft and blade angles of the wind turbine generator set so that the unit always faces the wind direction, thereby maximizing the collection and utilization of wind energy, ensuring the safe operation of the wind turbine set, and avoiding accidents caused by sudden changes in wind direction, etc., and further fixing the adjusted yaw angle through the limit component, thereby improving the structural strength, reducing the structural strain of the yaw system, and improving the service life of the yaw system.

[0009] The control assembly includes a control cavity opened in the yaw control frame and a yaw gear fixed on the top surface of the mounting column. Multiple drive motors are fixed in the control cavity, and multiple torque multipliers are fixed in the control cavity. The output shaft of each drive motor is coaxially fixedly connected to the input shaft of the corresponding torque multiplier, and the output shaft of each torque multiplier is coaxially fixed with a drive gear, and each drive gear is engaged with the yaw gear.

[0010] With the above structure, the torque multipliers can be driven by multiple drive motors, so that the multiple torque multipliers further drive the corresponding drive gears to rotate. The drive gears then engage with the yaw gears to drive the yaw control frame and the generator cabin to rotate synchronously, thereby achieving yaw control.

[0011] The limiting assembly includes a worm rotatably connected to the mounting post, and a driving rotating rod rotatably connected to the mounting post. The middle part of the driving rotating rod is coaxially fixedly connected to a worm gear, the worm gear is meshed with the worm, and both ends of the driving rotating rod are coaxially fixedly connected to a transmission gear 1. A pair of toothed rods are slidably connected in the mounting post, and the bottoms of the two toothed rods are meshed with the corresponding transmission gear 1. A pair of transmission gears 2 are rotatably connected in the limiting ring, and the tops of the two toothed rods are meshed with the corresponding transmission gear 2. A pair of driving screws are coaxially fixed on the two transmission gears 2, and each driving screw is threadedly connected to the corresponding tensioning block.

[0012] By adopting the above structure, the worm gear can be driven to rotate by the worm, and the worm gear will drive the driving rod to rotate after the rotation. The driving rod will drive the two transmission gears to rotate after the rotation. The two transmission gears will drive the corresponding racks to move. During the movement of the racks, the corresponding transmission gear 2 will be driven to rotate. When the transmission gear 2 rotates, the corresponding driving screw will be driven to rotate. After the driving screw rotates, it will drive the tensioning block to adjust the tensioning degree through the threaded connection with the corresponding tensioning block.

[0013] A non-slip pad is fixed on each tensioning block.

[0014] With the above structure, the anti-slip pad layer can be used to improve the stability of the tensioning block when it is tightened and limited with the groove wall of the annular groove.

[0015] A servo motor is fixed in the mounting column, and an output shaft of the servo motor is coaxially fixedly connected to the worm.

[0016] With the above structure, the worm can be controlled to rotate by the servo motor, thereby realizing the ability to automatically control the tightening degree of the tightening block.

[0017] Compared with the existing technology, the yaw control mechanism for wind power generation has the following advantages:

[0018] 1. Correct the yaw angle through the control component to control the main shaft and blade angle of the wind turbine so that the unit always faces the wind direction, thereby maximizing the collection and utilization of wind energy, ensuring the safe operation of the wind turbine, and avoiding accidents caused by sudden changes in wind direction.

[0019] 2. The adjusted yaw angle is further fixed and limited by the limit assembly, thereby improving the structural strength, reducing the structural wear of the yaw system, and extending the service life of the yaw system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the present utility model.

[0021] Figure 2 It is a structural diagram of the control component in the utility model.

[0022] Figure 3 It is a structural diagram of the drive component in the utility model.

[0023] Figure 4 It is a schematic diagram of the structure inside the limiting ring of the utility model.

[0024] In the figure, 1. Mounting column; 2. Yaw control frame; 3. Generator compartment; 4. Limiting ring; 5. Annular groove; 6. Tensioner; 7. Control chamber; 8. Yaw gear; 9. Drive motor; 10. Torque multiplier; 11. Drive gear; 12. Worm; 13. Drive shaft; 14. Worm gear; 15. Transmission gear 1; 16. Rack; 17. Transmission gear 2; 18. Drive screw; 19. Anti-skid pad; 20. Servo motor. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] like Figures 1-4 As shown, a yaw control mechanism for wind power generation includes a mounting column 1 and a yaw control frame 2 arranged at the top of the mounting column 1, a generator cabin 3 is fixed to the top of the yaw control frame 2, and a control component for correcting the yaw angle is arranged in the yaw control frame 2, and a limit ring 4 is fixed to the top of the mounting column 1, and an annular groove 5 is opened on the bottom surface of the yaw control frame 2, the annular groove 5 is slidably matched with the limit ring 4, and two pairs of tightening blocks 6 are slidably connected in the limit ring 4, and the two pairs of tightening blocks 6 are tightened and limited with the groove wall of the annular groove 5, and a limit component for controlling the tightening degree of the two pairs of tightening blocks 6 is arranged on the top of the mounting column 1.

[0027] The yaw angle can be corrected through the control component to control the main shaft and blade angle of the wind turbine so that the unit always faces the wind direction, thereby maximizing the collection and utilization of wind energy, ensuring the safe operation of the wind turbine, and avoiding accidents caused by sudden changes in wind direction. The adjusted yaw angle can be further fixed and limited by the limit component to improve the structural strength, reduce the structural strain of the yaw system, and increase the service life of the yaw system.

[0028] The control assembly includes a control chamber 7 opened in the yaw control frame 2 and a yaw gear 8 fixed to the top surface of the mounting column 1. Multiple drive motors 9 are fixed in the control chamber 7, and multiple torque multipliers 10 are fixed in the control chamber 7. The output shaft of each drive motor 9 is coaxially fixedly connected to the input shaft of the corresponding torque multiplier 10, and the output shaft of each torque multiplier 10 is coaxially fixed with a drive gear 11, and each drive gear 11 is meshed with the yaw gear 8.

[0029] With the above structure, the torque multiplier 10 can be driven by multiple drive motors 9, so that the multiple torque multipliers 10 further drive the corresponding drive gears 11 to rotate. The drive gears 11 then engage with the yaw gear 8 to drive the yaw control frame 2 and the generator cabin 3 to rotate synchronously, thereby realizing yaw control.

[0030] The limiting assembly includes a worm 12 rotatably connected to the mounting column 1, and a driving rotating rod 13 rotatably connected to the mounting column 1. The middle part of the driving rotating rod 13 is coaxially fixedly connected with a worm wheel 14, which is engaged with the worm 12, and both ends of the driving rotating rod 13 are coaxially fixedly connected with a transmission gear 15. A pair of gear rods 16 are slidably connected in the mounting column 1, and the bottoms of the two gear rods 16 are engaged with the corresponding transmission gear 15. A pair of transmission gears 2 17 are rotatably connected in the limiting ring 4, and the tops of the two gear rods 16 are engaged with the corresponding transmission gear 2 17, and a pair of driving screws 18 are coaxially fixed on the two transmission gears 2 17, and each driving screw 18 is threadedly connected to the corresponding tensioning block 6.

[0031] By adopting the above structure, the worm gear 14 can be driven to rotate by the worm 12. When the worm gear 14 rotates, it will drive the driving rod 13 to rotate. When the driving rod 13 rotates, it will drive the two transmission gears 15 to rotate. The two transmission gears 15 then drive the corresponding rack rod 16 to move. During the movement of the rack rod 16, the corresponding transmission gear 2 17 will be driven to rotate. When the transmission gear 2 17 rotates, it will drive the corresponding driving screw 18 to rotate. After the driving screw 18 rotates, it will drive the tensioning block 6 to adjust the tensioning degree through the threaded connection with the corresponding tensioning block 6.

[0032] An anti-slip pad 19 is fixed on each tensioning block 6 .

[0033] With the above structure, the anti-slip pad layer 19 can be used to improve the stability of the tensioning block 6 when performing tensioning and limiting cooperation with the groove wall of the annular groove 5 .

[0034] A servo motor 20 is fixed in the mounting column 1 , and an output shaft of the servo motor 20 is coaxially fixedly connected to the worm 12 .

[0035] With the above structure, the worm 12 can be controlled to rotate by the servo motor 20, thereby realizing the ability to automatically control the tightening degree of the tightening block 6.

[0036] The working principle of the present invention is as follows: a plurality of drive motors 9 drive the torque multiplier 10 to operate, so that the plurality of torque multipliers 10 further drive the corresponding drive gears 11 to rotate, and the drive gear 11 then drives the yaw control frame 2 and the generator cabin 3 to rotate synchronously through engagement with the yaw gear 8, thereby realizing yaw control, thereby controlling the main shaft and blade angle of the wind turbine generator set, so that the unit always faces the wind direction, thereby maximizing the collection and utilization of wind energy, and ensuring the safe operation of the wind turbine set, and controlling the worm 12 to rotate through the servo motor 20, and driving the worm wheel 14 to rotate through the worm 12, and the worm wheel 14 will drive the rotation of the worm wheel 14. The driving rod 13 rotates, and after the driving rod 13 rotates, it drives the two transmission gears 15 to rotate, and the two transmission gears 15 then drive the corresponding rack rods 16 to move. During the movement of the rack rods 16, the corresponding transmission gear 2 17 is driven to rotate. After the transmission gear 2 17 rotates, it drives the corresponding driving screw 18 to rotate. After the driving screw 18 rotates, it drives the tensioning block 6 to adjust the tensioning degree through the threaded connection with the corresponding tensioning block 6, thereby achieving further fixed limit of the adjusted yaw angle, improving the structural strength, reducing the structural strain of the yaw system, and improving the service life of the yaw system.

[0037] In summary, the yaw angle is corrected by the control component, thereby controlling the main shaft and blade angles of the wind turbine generator set so that the unit always faces the wind direction, thereby maximizing the collection and utilization of wind energy, ensuring the safe operation of the wind turbine, and avoiding accidents caused by sudden changes in wind direction. In addition, the adjusted yaw angle is further fixed and limited by the limit component, thereby improving the structural strength, reducing the structural strain of the yaw system, and increasing the service life of the yaw system.

[0038] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A yaw control mechanism for wind power generation, comprising a mounting column (1) and a yaw control frame (2) arranged at the top of the mounting column (1), characterized in that: A generator cabin (3) is fixed to the top of the yaw control frame (2), and a control component for correcting the yaw angle is provided in the yaw control frame (2), and a limit ring (4) is fixed to the top of the mounting column (1), and an annular groove (5) is provided on the bottom surface of the yaw control frame (2), the annular groove (5) and the limit ring (4) are slidably matched, and two pairs of tightening blocks (6) are slidably connected in the limit ring (4), and the two pairs of tightening blocks (6) are tightened and limited with the groove wall of the annular groove (5), and a limit component for controlling the tightening degree of the two pairs of tightening blocks (6) is provided on the top of the mounting column (1).

2. A yaw control mechanism for wind power generation according to claim 1, characterized in that: The control assembly comprises a control chamber (7) provided in a yaw control frame (2), a yaw gear (8) fixed on the top surface of a mounting column (1), a plurality of drive motors (9) fixed in the control chamber (7), and a plurality of torque multipliers (10) fixed in the control chamber (7), and an output shaft of each drive motor (9) is coaxially fixedly connected to an input shaft of a corresponding torque multiplier (10), and a drive gear (11) is coaxially fixed to the output shaft of each torque multiplier (10), and each drive gear (11) is meshed with the yaw gear (8).

3. The yaw control mechanism for wind power generation according to claim 1, characterized in that: The limiting assembly includes a worm (12) rotatably connected to the mounting column (1) and a driving rod (13) rotatably connected to the mounting column (1), a worm wheel (14) is coaxially fixedly connected to the middle of the driving rod (13), the worm wheel (14) is meshed with the worm (12), and both ends of the driving rod (13) are coaxially fixedly connected to a transmission gear 1 (15), a pair of toothed rods (16) are slidably connected to the mounting column (1), and the bottoms of the two toothed rods (16) are meshed with the corresponding transmission gear 1 (15), a pair of transmission gears 2 (17) are rotatably connected to the limiting ring (4), the tops of the two toothed rods (16) are meshed with the corresponding transmission gear 2 (17), and a pair of driving screws (18) are coaxially fixed on the two transmission gears 2 (17), and each driving screw (18) is threadedly connected to the corresponding tensioning block (6).

4. The yaw control mechanism for wind power generation according to claim 1, characterized in that: An anti-skid pad (19) is fixed on each tensioning block (6).

5. The yaw control mechanism for wind power generation according to claim 3, characterized in that: A servo motor (20) is fixed in the mounting column (1), and an output shaft of the servo motor (20) is coaxially fixedly connected to the worm (12).

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