Low-interference wind turbine generator yaw correction device

Abstract

The invention discloses a low interference type wind turbine generator yaw correction device, and particularly relates to the technical field of wind turbine generator yaw correction, the low interference type wind turbine generator yaw correction device comprises an oil tank, a yaw positioning assembly is arranged in the oil tank, the yaw positioning assembly comprises a sealing bottom plate arranged in the oil tank, and a first gear is arranged at the top of the sealing bottom plate; limiting clamping teeth are arranged on the outer side of the first gear. High-precision positioning is achieved through a double-limiting structure, on one hand, the limiting clamping teeth are clamped with the first gear all the time under the action of the elastic force of the spring, and passive limiting is formed; on the other hand, the hydraulic rod drives the limiting bolt to be inserted into the positioning opening to form active limiting. The problem that in the prior art, after the gear loses power, the limiting function fails is solved through double guarantee, the yaw phenomenon is greatly reduced, the wind turbine generator set is more accurate in wind alignment, and power generation loss caused by inaccurate wind alignment is reduced.

Description

Technical Field

[0001] This invention relates to the field of wind turbine yaw correction technology, and more specifically, to a low-interference wind turbine yaw correction device. Background Technology

[0002] Inaccurate yaw alignment of wind turbines significantly impacts power generation, directly affecting the economic benefits of wind farms. The primary cause of this misalignment is that the zero-direction reading from the wind direction sensor located on the nacelle does not correspond to the actual direction of the turbine's nose. Currently, wind vane zero-point calibration during maintenance and installation relies on observation, with maintenance personnel visually aligning the zero mark of the vane with the turbine's direction. However, individual differences in perception can lead to calibration errors, causing the sensor's zero-direction reading to deviate from the turbine's actual direction. This misalignment results in reduced wind energy capture and power generation, severely impacting the economic efficiency of the wind farm.

[0003] Among them, the patent with announcement number CN217354591U discloses a yaw correction device for a wind turbine, including a mounting column, a nacelle rotatably connected to the top of the mounting column, a protective cylinder fixedly connected to the bottom of the nacelle and outside the mounting column, a wind direction sensor installed on the top of the nacelle, a correction mechanism installed inside the nacelle and the protective cylinder, and a limiting mechanism adapted to the correction mechanism installed inside the protective cylinder. The limiting mechanism includes a mounting block, and a movable cavity is opened on the side of the mounting block near the correction mechanism. When in use, the correction mechanism of this structure includes an external gear ring and a drive motor. The external gear ring is fixedly connected to the top of the mounting base surface to form a constraint. Although the gear ring forms a wrap-around protection to achieve the centering function, it also loses the limiting function when the gear loses power. This leads to inaccurate positioning of the gear ring, which in turn causes yaw. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a low-interference wind turbine yaw correction device, which aims to solve the problems mentioned in the background art.

[0005] The present invention provides the following technical solution: a low-interference wind turbine yaw correction device, including an oil tank, wherein a yaw positioning component is provided inside the oil tank; The yaw positioning assembly includes a sealed base plate disposed inside the fuel tank. A first gear is disposed on the top of the sealed base plate. A limiting tooth is disposed on the outer side of the first gear. One end of the limiting tooth extends to the outer side of the first gear and engages with the first gear. A spring is embedded on one side of the limiting tooth. A second gear is provided on the side of the first gear away from the limiting tooth. The second gear meshes with the first gear, and both the first gear and the second gear are provided with inner lining plates on their tops. A motor for driving the second gear to rotate is provided at the bottom of the sealing base plate. The sealing base plate has an elongated hole, and the inner wall of the elongated hole has a transverse groove. A sliding plate is slidably connected in the transverse groove. A coupling is rotatably connected to the middle of the sliding plate. Elastic abutment members are respectively provided on both sides of the sliding plate, which abut against the inner wall of the elongated hole. The motor is installed at the bottom of the sliding plate through a connecting cover, and the connecting cover abuts against the bottom of the sealing base plate and is slidably connected to the sealing base plate. The second gear, the coupling, and the output end of the motor are coaxially fixedly connected. One end of the sealing base plate is rotatably connected to a first threaded sleeve. The middle of the first threaded sleeve is threadedly connected to an adjusting rod, and one end of the adjusting rod extends to one end of the sliding plate and is rotatably connected to the sliding plate. Several limiting slots are opened on the outer side of the adjusting rod, and a slanted abutment is engaged in the limiting slot. One end of the slanted abutment is fixed to one end of the sealing base plate, and a second threaded sleeve is threadedly connected to the outer side of the slanted abutment.

[0006] Optionally, in a possible implementation, a limiting side plate is provided on one side of both the inner liner and the sealing base plate. One end of the spring extends to the limiting side plate. An extension sleeve is fixedly provided at the top and bottom of the first gear, and each extension sleeve is rotatably connected to the inner liner and the sealing base plate respectively. A plurality of positioning holes are provided at the bottom of the first gear, and each positioning hole is circumferentially distributed along the axis of the extension sleeve. A reinforcing L-plate is provided at the bottom of the sealing base plate. The vertical cross-sectional shape of the reinforcing L-plate is set to L-shape, and one end of the reinforcing L-plate extends to one end of the extension sleeve. A spring is installed on the reinforcing L-plate by bolts. A hydraulic rod is provided with a limit pin at its output end. One end of the limit pin passes through the sealing base plate and extends into the positioning port. The cross-sectional shape of the limit tooth is arc-shaped, and the end of the limit tooth away from the first gear is rotatably connected to a limit shaft. The limit shaft is inserted between the sealing base plate and the inner liner plate. A gasket is provided at the top of the oil tank, and a wind turbine mounting plate is rotatably connected to the gasket. A generator shaft is provided in the middle of the extension sleeve. The top of the generator shaft passes through the inner liner plate, the oil tank, and the gasket and extends to the bottom of the wind turbine mounting plate. A column is installed at one end of both the sealing base plate and the inner liner plate by bolts. The technical effects and advantages of this invention are as follows: 1. This invention achieves high-precision positioning through a dual-limiting structure: on one hand, the limiting teeth are always engaged with the first gear under the action of spring force, forming a passive limit; on the other hand, the hydraulic rod drives the limiting pin to insert into the positioning port, forming an active limit. This dual protection solves the problem of the limiting function failing after the gear loses power in the prior art, significantly reducing yaw phenomenon, making the wind turbine more accurately aligned with the wind, and reducing power generation loss caused by inaccurate wind alignment.

[0007] 2. The engagement between the limiting tooth and the first gear is achieved by the elastic force of the spring, which is an elastic contact. When the first gear rotates, the limiting tooth can overcome the spring force and rotate slightly under the action of the tooth surface thrust, avoiding wear caused by rigid friction on the gear and tooth, and reducing interference and energy loss in the transmission process. 3. The sealing base plate and inner lining plate of the present invention are connected by columns to form a stable frame structure, providing solid support for each component and improving the overall stability of the device during operation. On this basis, one end of the L plate is extended to one end of the extension sleeve to realize the function of lateral positioning of the first gear, and also to ensure that the limit pin can stably realize the positioning function during operation, avoiding the impact of positioning effect due to structural loosening. 4. The elongated hole and transverse groove on the sealing base plate of this invention cooperate with the sliding plate. Combined with the elastic abutment parts on both sides of the sliding plate, when there is a coaxiality deviation between the second gear and the first gear due to installation error, the meshing gap can be adaptively adjusted by the buffer sliding of the sliding plate. This achieves the function of adaptive structure to compensate for installation error. In addition, the meshing gap between the second gear and the first gear can be manually adjusted as needed. The end of the inclined abutment rod is pressed into the limiting slot to lock the position of the adjusting rod, ensuring smooth gear transmission, reducing energy loss during transmission, and reducing motor operating energy consumption. In summary, the high-precision positioning achieved through the dual-limiting structure provides dual protection, solving the problem of limit function failure after gear power loss in existing technologies. This significantly reduces yaw, making the wind turbine more accurately aligned with the wind, reducing power generation loss due to inaccurate alignment. Furthermore, the limit teeth can overcome the spring force and rotate slightly under the thrust of the tooth surface, avoiding wear caused by rigid friction on the gears and teeth, reducing interference and energy loss during transmission. At the same time, the extension of one end of the L-plate to one end of the extension sleeve enables lateral positioning of the first gear and ensures that the limit pin can stably perform the positioning function during operation, preventing the positioning effect from being affected by structural loosening. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0009] Figure 1 This is a front view of the overall structure of the present invention.

[0010] Figure 2 This is a schematic diagram of the yaw positioning component of the present invention.

[0011] Figure 3 This is a schematic diagram of the oil tank, gasket ring, and impeller mounting plate of the present invention.

[0012] Figure 4 This is a side view of the yaw positioning component of the present invention.

[0013] Figure 5 This is a schematic diagram of the sealing base plate, the first gear, the second gear, and the limiting tooth of the present invention.

[0014] Figure 6 This is a schematic diagram of the second gear, motor, limiting tooth, spring, reinforcing L-plate, and limiting shaft of the present invention.

[0015] Figure 7 This is a schematic diagram of the sealing base plate, elongated hole, transverse groove, sliding plate, and coupling of the present invention.

[0016] Figure 8 This is a side view of the first threaded sleeve, the adjusting rod, the second threaded sleeve, and the inclined abutment rod of the present invention.

[0017] The attached diagram is labeled as follows: 1. Oil tank; 2. Sealing base plate; 3. First gear; 4. Limiting tooth; 5. Spring; 6. Limiting side plate; 7. Second gear; 8. Motor; 9. Reinforcing L-plate; 10. Hydraulic rod; 11. Limiting pin; 12. Positioning port; 13. Limiting shaft; 14. Extension sleeve; 15. Generator shaft; 16. Washer ring; 17. Wind turbine mounting plate; 18. Column; 19. Inner liner plate; 20. Long slot; 21. Horizontal groove; 22. Slide plate; 23. Coupling; 24. Elastic contact element; 25. First threaded sleeve; 26. Adjusting rod; 27. Limiting groove; 28. Angled abutment rod; 29. ​​Second threaded sleeve; 30. Connecting cover. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0019] Example 1 This embodiment aims to solve the problems of low positioning accuracy and easy deviation after power cut-off in existing yaw correction devices, and achieves low interference and high precision yaw correction through a double limiting structure.

[0020] like Figure 1 As shown, the low-interference wind turbine yaw correction device includes an oil tank 1, which houses the yaw positioning component and provides protection. The yaw positioning component is the core of the device, and its structure is as follows: Figure 2 As shown, it specifically includes: Sealing base plate 2: Horizontally fixed to the bottom of oil tank 1, used to support various transmission components. One side is bolted to a limiting side plate 6, which is a steel plate used to constrain the extension and retraction direction of spring 5. Simultaneously, the sealing base plate 2 has an elongated hole 20, as shown in the attached... Figure 7 and attached Figure 8 As shown, transverse grooves 21 are symmetrically opened on the inner walls of both sides of the elongated hole 20. The slide plate 22 is slidably connected in the transverse grooves 21. In order to ensure that the motor 8 and the second gear 7 can be adjusted laterally in sync, a connecting cover 30 for mounting the motor 8 is bolted to the bottom of the slide plate 22 to ensure the stability of the motor 8 mounted on the bottom of the slide plate 22. The connecting cover 30 abuts against the bottom of the sealing base plate 2 and is slidably connected to the sealing base plate 2 to ensure the stability of the motor 8 and the second gear 7 during lateral adjustment, so as to both eliminate installation errors and ensure transmission stability.

[0021] Slide plate 22 is a rectangular wear-resistant cast iron plate with a circular hole in the center for rotating connection of coupling 23; elastic abutment members 24 are symmetrically embedded on both ends of slide plate 22, as shown in the attached figure. Figure 7 As shown, the elastic contact 24 is a spiral body made of polyurethane. One end of it is press-fitted with the slide plate 22, and the other end abuts against the inner wall of the transverse groove 21. Through elastic deformation, the slide plate 22 is buffered and slids in the transverse groove 21, avoiding rigid impact caused by installation error when the second gear 7 meshes with the first gear 3.

[0022] One end of the sealing base plate 2 is rotatably connected to the first threaded sleeve 25 via a bearing. The middle of the first threaded sleeve 25 is threadedly connected to the adjusting rod 26. One end of the adjusting rod 26 extends to one end of the slide plate 22 via a bearing and is rotatably connected to the slide plate 22. Rotating the first threaded sleeve 25 can drive the adjusting rod 26 to push the slide plate 22 to slide along the elongated hole 20, which is used to manually adjust the meshing clearance between the second gear 7 and the first gear 3. Several limiting slots 27 are evenly opened on the outer side of the adjusting rod 26 along the axial direction. An inclined abutment rod 28 is engaged in the limiting slot 27. One end of the inclined abutment rod 28 is welded to the sealing base plate 2, and its outer side is threadedly connected to the second threaded sleeve 29. Tightening the second threaded sleeve 29 can press the end of the inclined abutment rod 28 into the limiting slot 27, locking the position of the adjusting rod 26 and preventing the slide plate 22 from shifting during operation.

[0023] First gear 3: Parallel to the top of the sealing base plate 2. For example... Figure 5 As shown, the top and bottom of the first gear 3 are welded with extension sleeves 14, which are rotatably connected to the inner liner plate 19 and the sealing base plate 2 respectively through bearings, ensuring that the first gear 3 can rotate flexibly.

[0024] Limiting tooth 4: such as Figure 5 As shown, its cross-section is arc-shaped, and the curvature matches the outer circle of the first gear 3. One end of the limiting tooth 4 engages with the tooth groove of the first gear 3, and the other end is rotatably connected between the sealing base plate 2 and the inner liner plate 19 via the limiting shaft 13. A spring 5 is embedded on the side of the limiting tooth 4 away from the first gear 3. The spring 5 is a cylindrical helical compression spring, and its other end is fixed to the limiting side plate 6. Through the elastic force, the limiting tooth 4 is always pressed against the first gear 3 to achieve passive limiting.

[0025] The second gear 7 and the motor 8: The second gear 7 is the driving gear and meshes with the first gear 3. For example... Figure 6 As shown, the bottom of the second gear 7 is connected to the output shaft of the motor 8 via a key. The motor 8 can be a servo motor with forward and reverse rotation functions, used to drive the second gear 7 to rotate, thereby driving the first gear 3 to rotate.

[0026] like Figure 6 As shown, the bottom of the first gear 3 has several positioning holes 12 distributed around the circumference of the extension sleeve 14. The positioning holes 12 are round holes used for precise positioning. A reinforcing L-plate 9 is welded to the bottom of the sealing base plate 2, one end of which extends to the bottom of the extension sleeve 14, and a hydraulic rod 10 is installed thereon by bolts. The output end of the hydraulic rod 10 is connected to a limiting pin 11. One end of the limiting pin 11 passes through the sealing base plate 2 and can be inserted into the positioning hole 12 under the drive of the hydraulic rod 10 to achieve active positioning.

[0027] like Figure 3As shown, a washer 16 is bolted to the top of the oil tank 1, and a wind turbine mounting plate 17 is rotatably connected to the washer 16 for mounting the wind turbine. The generator shaft 15 passes through the middle of the extension sleeve 14 of the first gear 3, and its top end passes through the inner liner 19, the oil tank 1, and the washer 16 in sequence, and finally connects to the bottom of the wind turbine mounting plate 17 through a spline, ensuring that the first gear 3 can synchronously drive the wind turbine mounting plate 17 to deflect when it rotates.

[0028] Liner plate 19 and column 18: Liner plate 19 is a stainless steel plate parallel to sealing base plate 2. The two ends of column 18 are bolted to sealing base plate 2 and liner plate 19 respectively to form a frame structure and enhance overall stability.

[0029] Example 2 like Figure 4 As shown, the inner lining plate 19 and the sealing base plate 2 are arranged in parallel and are fixed together by the column 18. The first gear 3 is suspended between the two by the extension sleeve 14 and can rotate freely.

[0030] When the motor 8 drives the second gear 7 to rotate, the second gear 7 meshes with the first gear 3, driving the first gear 3 and the generator shaft 15 to rotate synchronously. Finally, the generator shaft 15 drives the wind turbine mounting plate 17 to deflect, thus realizing the yaw action.

[0031] Furthermore, if there is a slight coaxiality deviation between the second gear 7 and the first gear 3 due to installation errors, the slide plate 22 can be adaptively adjusted within the transverse groove 21 of the elongated hole 20 by the buffer sliding of the elastic contact member 24 to ensure stable gear meshing clearance. On this basis, rotating the first thread sleeve 25 can drive the adjusting rod 26 to push the slide plate 22 along the elongated hole 20 for manually adjusting the meshing clearance between the second gear 7 and the first gear 3. In addition, tightening the second thread sleeve 29 can press the end of the inclined abutment rod 28 into the limiting slot 27, locking the position of the adjusting rod 26 and preventing the slide plate 22 from shifting during operation.

[0032] Under the elastic force of the spring 5, the limiting tooth 4 is always engaged with the first gear 3, forming the first limiting; the hydraulic rod 10 drives the limiting pin 11 to insert into the positioning port 12, forming the second limiting. The double limiting ensures accurate positioning. The specific working principle is as follows: When the wind turbine needs to adjust its wind direction, the wind turbine control system sends a command to motor 8. Motor 8 starts and drives the second gear 7 to rotate, which in turn drives the first gear 3 to rotate through gear meshing. At this time, the limiting tooth 4, under the thrust of the tooth surface of the first gear 3, overcomes the elastic force of the spring 5 and rotates slightly around the limiting shaft 13, disengaging from the tooth groove without rigid interference, ensuring smooth rotation of the first gear 3. The first gear 3 drives the generator shaft 15 to rotate synchronously through the extension sleeve 14, ultimately causing the wind turbine mounting plate 17 and the wind turbine to deflect to the target angle. This process can be controlled by the feedback signal from the wind direction sensor of the wind turbine.

[0033] Once the wind turbine has deflected to the target angle, motor 8 stops operating. At this point: Spring 5 resets, pushing the limiting tooth 4 to re-engage in the tooth groove of the first gear 3, forming the first mechanical limit to prevent the first gear 3 from rotating slightly due to wind load; At the same time, the control system triggers the hydraulic rod 10 to start, and its output end pushes the limit pin 11 to move upward, penetrates the sealing base plate 2 and inserts into the positioning port 12 at the corresponding position, forming a second rigid limit and completely locking the first gear 3.

[0034] When yaw is required again, the hydraulic rod 10 retracts first, causing the limit pin 11 to disengage from the positioning port 12. Then the motor 8 starts, and when the first gear 3 rotates, it pushes open the limit locking tooth 4, repeating the correction process to achieve low-interference switching.

[0035] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A low-interference wind turbine yaw correction device, comprising an oil tank (1), characterized in that: The fuel tank (1) is equipped with a yaw positioning component; The yaw positioning assembly includes a sealing base plate (2) disposed in the fuel tank (1), a first gear (3) is disposed on the top of the sealing base plate (2), a limiting tooth (4) is disposed on the outside of the first gear (3), one end of the limiting tooth (4) extends to the outside of the first gear (3) and engages with the first gear (3), and a spring (5) is embedded on one side of the limiting tooth (4). A second gear (7) is provided on the side of the first gear (3) away from the limiting tooth (4). The second gear (7) meshes with the first gear (3). Both the top of the first gear (3) and the second gear (7) are provided with inner liner plates (19). The bottom of the sealing base plate (2) is provided with a motor (8) for driving the second gear (7) to rotate. The sealing base plate (2) has an elongated hole (20) and a transverse groove (21) on the inner wall of the elongated hole (20). A sliding plate (22) is slidably connected in the transverse groove (21). A coupling (23) is rotatably connected to the middle of the sliding plate (22). Elastic abutting elements (24) that abut against the inner wall of the elongated hole (20) are respectively provided on both sides of the sliding plate (22). The motor (8) is installed at the bottom of the sliding plate (22) through a connecting cover (30). The connecting cover (30) abuts against the bottom of the sealing base plate (2) and is slidably connected to the sealing base plate (2). The second gear (7), the coupling (23) and the output end of the motor (8) are coaxially fixedly connected.

2. The low-interference wind turbine yaw correction device according to claim 1, characterized in that: Both the inner lining plate (19) and the sealing base plate (2) are provided with a limiting side plate (6) on one side, and one end of the spring (5) extends to the limiting side plate (6).

3. The low-interference wind turbine yaw correction device according to claim 1, characterized in that: The first gear (3) is fixedly provided with an extension sleeve (14) at the top and bottom, and each of the extension sleeves (14) is rotatably connected to the inner liner plate (19) and the sealing base plate (2).

4. The low-interference wind turbine yaw correction device according to claim 3, characterized in that: The bottom of the first gear (3) is provided with several positioning ports (12), and each positioning port (12) is distributed around the circumference of the axis of the extension sleeve (14).

5. The low-interference wind turbine yaw correction device according to claim 4, characterized in that: The bottom of the sealing base plate (2) is provided with a reinforcing L plate (9), the vertical cross-sectional shape of the reinforcing L plate (9) is set to L-shaped, and one end of the reinforcing L plate (9) extends to one end of the extension sleeve (14).

6. The low-interference wind turbine yaw correction device according to claim 5, characterized in that: A hydraulic rod (10) is bolted to the reinforcing L plate (9). The output end of the hydraulic rod (10) is provided with a limit pin (11). One end of the limit pin (11) passes through the sealing base plate (2) and extends into the positioning port (12).

7. The low-interference wind turbine yaw correction device according to claim 1, characterized in that: The cross-sectional shape of the limiting tooth (4) is set to arc shape, and the end of the limiting tooth (4) away from the first gear (3) is rotatably connected to the limiting shaft (13), which is inserted between the sealing base plate (2) and the inner liner plate (19).

8. The low-interference wind turbine yaw correction device according to claim 3, characterized in that: A gasket (16) is provided at the top of the oil tank (1), and a wind turbine mounting plate (17) is rotatably connected to the gasket (16). A generator shaft (15) is provided in the middle of the extension sleeve (14). The top of the generator shaft (15) passes through the inner liner plate (19), the oil tank (1) and the gasket (16) and extends to the bottom of the wind turbine mounting plate (17). A column (18) is bolted to one end of the sealing base plate (2) and the inner liner plate (19).

9. The low-interference wind turbine yaw correction device according to claim 1, characterized in that: One end of the sealing base plate (2) is rotatably connected to a first threaded sleeve (25), and the middle part of the first threaded sleeve (25) is threadedly connected to an adjusting rod (26), and one end of the adjusting rod (26) extends to one end of the slide plate (22) and is rotatably connected to the slide plate (22).

10. The low-interference wind turbine yaw correction device according to claim 9, characterized in that: The adjusting rod (26) has several limiting slots (27) on its outer side, and a slanted abutment rod (28) is engaged in the limiting slots (27). One end of the slanted abutment rod (28) is fixed to one end of the sealing base plate (2), and a second threaded sleeve (29) is threaded to the outer side of the slanted abutment rod (28).

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