A yaw system for a wind turbine generator set

Abstract

The present invention provides a yaw system for a wind turbine generator set, belonging to the technical field of wind power generation; it includes a main frame, a tower connected to the main frame, and blades; a yaw ring gear is fixedly mounted on the upper end of the tower; a plurality of yaw reducers are connected to the inner bottom wall of the main frame; the output end of the yaw reducer passes through the main frame and is fixedly connected to a pinion gear meshing with the yaw ring gear. The present invention provides a hydraulic rod and a steel cable; the hydraulic rod rotates within a movable frame and is connected to a guide wheel that guides two steel cables; the guide frame supports the steel cables when they are pulled; the yaw reducer is driven to rotate eccentrically by pulling at both ends of the steel cable and reversing the guide mechanism, thereby adjusting the side clearance between the yaw ring gear and the pinion gear due to excessive side clearance; the guide mechanism reduces the wear on one end of the steel cable when it is pulled, so that the wear degree of the pinion gears installed on the yaw reducers on different sides can be read.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a yaw system of a wind generator set. Background Art

[0002] In a wind turbine, there is an important component whose quality will affect the operation of the entire turbine. This important component is the yaw system. The wind direction will often change, and the angle between the wind and the horizontal direction will change. The swept surface of the impeller will no longer be perpendicular to the wind direction. At this time, the efficiency of wind power generation will be reduced, and it is likely to aggravate the load state.

[0003] The yaw system's function is to capture wind direction and ensure the nacelle faces the wind smoothly, accurately, and reliably. For example, suppose the wind is blowing from the southeast and the turbine is operating normally, with the nacelle impeller facing the wind, that is, facing the southeast. However, over time, the wind direction gradually changes to the south, and the turbine cannot operate in its original position. The anemometer measures the wind direction change and transmits it to the control system for storage. The control system then controls the yaw motor in the yaw drive unit to rotate synchronously in the direction of the changing wind speed. The yaw motor drives the pinion gear through the reduction gearbox, which meshes with the large ring gear. Together, the yaw motor and yaw gearbox are collectively referred to as the yaw drive unit. The yaw drive unit is bolted to the mainframe, while the large ring gear is fastened to the tower flange. Therefore, the pinion gear rotates around the large ring gear, driving the mainframe until the nacelle aligns with the wind direction measured by the wind vane, while preventing the cables from twisting. At this point, the yaw system must rotate the nacelle in the opposite direction, completing the cable undoing and allowing the turbine to maintain normal operation.

[0004] In the prior art, the four pinions in the yaw system are each connected to the yaw reduction gearbox and mesh with the same yaw ring gear. To ensure accurate and noiseless yaw positioning, the backlash of the meshing gear pairs should be regularly checked with a feeler gauge to ensure that the backlash is between 0.7 and 1.3 mm. If the requirements are not met, remove the connecting bolts between the main frame and the drive device, slowly rotate the yaw reduction gearbox until the appropriate gap is obtained, and then tighten the bolts with the specified torque. During the above operation, the bolts on the outside of the yaw reduction gearbox and the bolt holes around the main frame are used for adjustment, and the accuracy range is low. If the side clearance between the pinion and the yaw gear exceeds 1.3mm, and the angle after the yaw reduction gearbox is rotated after the bolts are removed is not enough to adjust the side clearance between the pinion and the yaw gear to between 0.7-1.3mm, the pinion is subjected to a large load, the impact is increased due to excessive side clearance, and the pinion is worn and makes noise. If the meshing clearance between the pinion and the yaw gear ring is not adjusted in time, the wear will be aggravated, the transmission accuracy will be reduced, and inaccurate transmission will be caused, which will reduce the service life of the gear and may even cause tooth knocking. Therefore, the present application provides a yaw system for a wind turbine to meet the needs. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a wind turbine yaw system to solve the problem that the angle after rotating the yaw reduction box after the existing bolts are removed is not enough to adjust the side clearance between the pinion and the yaw gear to a specified range.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A yaw system of a wind turbine generator set includes a main frame, a tower connected to the main frame and blades, a yaw gear ring is fixedly installed on the upper end of the tower, a plurality of yaw reducers are connected to the inner bottom wall of the main frame, the output end of the yaw reducer passes through the main frame and is fixedly connected to a pinion meshing with the yaw gear ring, the inner bottom wall of the main frame is provided with a mounting hole for fixing the yaw reducer, and the yaw reducer can be eccentrically rotated through one end of the mounting hole, a center column is fixedly connected to the middle of the tower, and the top end of the center column is fixed A hydraulic rod is fixedly connected, and two steel cables of equal length are provided at the output end of the hydraulic rod. The two ends of the steel cables are respectively fixed to the hanging ears of the two diagonal yaw reducers. The hydraulic rod drives the middle parts of a pair of steel cables to move downward. The inner bottom wall of the main frame is connected to a guide mechanism that guides the steel cables. The yaw reducer is driven to rotate eccentrically by pulling the two ends of the steel cables and reversing the guide mechanism. The mounting hole includes a positioning hole and a plurality of waist-shaped holes, and the plurality of waist-shaped holes are opened in a circle along the axis of the positioning hole.

[0008] Preferably, the waist-shaped hole includes a measuring hole, and the arc length of the measuring hole is greater than the arc length of the waist-shaped hole.

[0009] Preferably, the guide mechanism comprises a guide block in a bridge shape, and an inner side wall of the guide block is slidably connected to a guide plate.

[0010] Preferably, an anti-sliding block is fixedly connected to the inner side wall of the guide plate, and both ends of the anti-sliding block are protruding outwards and are distributed in multiple sections.

[0011] Preferably, a guide hole is formed on the outer side wall of the guide block, and an elastic sheet is fixedly connected to the outer side wall of the guide block. The other end of the elastic sheet passes through the guide hole and is fixed to the guide plate.

[0012] Preferably, the outer wall of the guide block is fixedly connected to a reinforcing plate with an arc-shaped cross-section, the guide hole passes through the reinforcing plate, the guide block is fixedly connected to a U-shaped frame on the side facing the middle of the tower, and the upper end of the guide block is fixedly connected to a hanging frame welded to the U-shaped frame.

[0013] Preferably, the inner top wall of the main frame is fixedly connected to a guide frame, and four evenly distributed guide rods extend downward from the lower end of the guide frame. The lower end of each guide rod is provided with a through hole for guiding the steel cable, and the lower end of the guide frame is fixedly connected to a connecting frame.

[0014] Preferably, the through hole includes an upper side hole inclined upward and a lower side hole inclined downward, and the upper side hole and the lower side hole are respectively opened on two guide rods opposite to each other at the lower end of the guide frame.

[0015] Preferably, the output end of the hydraulic rod is fixedly connected to a moving frame, a guide wheel for guiding the two steel cables is rotatably connected to the moving frame, and a bottom plate is fixedly connected to the inner side wall of the moving frame and located under each guide wheel.

[0016] Preferably, a generator is fixedly mounted on the inner bottom wall of the main frame, a main shaft passing through the guide frame is connected between the generator and the blades, and a wind measuring device is fixedly mounted on the inner side wall of the main frame.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] In the above scheme, a hydraulic rod and a steel cable are set. The hydraulic rod is connected to a guide wheel that guides the two steel cables through rotation in a mobile frame, thereby reducing friction when the steel cables are pulled. At the same time, the two ends of the steel cables are in an adaptive state, and the guide frame supports the steel cables when they are pulled. By pulling the two ends of the steel cables and reversing the direction of the guide mechanism, the yaw reducer is driven to rotate eccentrically, so that the yaw reducers on different sides can be rotated eccentrically, and the side clearance between the yaw gear ring and the pinion is adjusted due to excessive side clearance, thereby reducing the wear of the pinion. After each contraction of the hydraulic rod, the staff measures the side clearance between the yaw gear ring and the pinion through a feeler gauge and a measuring hole. There is no need to tighten the yaw reducer through different bolt holes after rotating the angle, which increases the accuracy of the entire adjustment and avoids the angle after the yaw reducer box being insufficient to bring the pinion gear into the side clearance range, resulting in increased wear of the pinion and reduced transmission accuracy.

[0019] By setting a guide mechanism, a bridge-shaped guide block and an arc-shaped reinforcement plate, the strength of the overall structure is strengthened. Both ends of the multi-section anti-sliding block are protruding outward, which increases the contact area with the steel cable, thereby increasing the friction. When the steel cable is pulled, the steel cable is close to the anti-sliding block and drives the guide plate to slide slowly, thereby reducing the wear on one end of the steel cable when it is pulled. When the steel cable is no longer pulled, one end of the elastic sheet applies pressure to the guide plate, so that the guide plate returns to its initial position. At the same time, the staff can mark the side of the guide plate through the guide hole, which is convenient for the staff to see the length of the stretch of the ends of different steel cables, so that the wear degree of the small gears installed on the yaw reducers on different sides can be read. The U-shaped frame is used to increase the stability of the lifting frame when hoisting. At the same time, the U-shaped frame increases the stability of the guide block when using the steel cable, and does not affect the user reading the scale on the guide plate through the guide hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable one skilled in the relevant art to make and use the present disclosure.

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of a yaw system of a wind turbine generator set;

[0022] Figure 2 This is a schematic diagram of the cross-sectional three-dimensional structure of a yaw system of a wind turbine generator set;

[0023] Figure 3 A schematic diagram of a three-dimensional structure of a main frame of a yaw system of a wind turbine generator set cut away from the first perspective;

[0024] Figure 4 for Figure 3 Schematic diagram of the three-dimensional structure at A in the middle;

[0025] Figure 5 for Figure 3 Schematic diagram of the three-dimensional structure at B in the middle;

[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of a guide frame of a yaw system of a wind turbine generator set;

[0027] Figure 7 A partially cutaway perspective schematic diagram of a wind turbine yaw system main frame with the hoisting frame removed from the second perspective;

[0028] Figure 8 This is a schematic diagram of the first-person perspective structure of a yaw system guide mechanism of a wind turbine generator set;

[0029] Figure 9 A schematic diagram of the second perspective three-dimensional structure of a yaw system guide mechanism of a wind turbine generator set;

[0030] Figure 10 A schematic diagram of a three-dimensional structure of a main frame of a yaw system of a wind turbine generator set cut away from a third perspective;

[0031] Figure 11 A schematic diagram of a partially cutaway three-dimensional structure of a main frame of a yaw system of a wind turbine generator set from a fourth perspective;

[0032] Figure 12 for Figure 11 Schematic diagram of the three-dimensional structure at C in the middle;

[0033] Figure 13 A schematic diagram of a three-dimensional structure of a main frame of a yaw system of a wind turbine generator set cut away from the fifth perspective;

[0034] Figure 14 for Figure 13 Schematic diagram of the three-dimensional structure at point D in the middle.

[0035] [reference numerals]

[0036] 1. Tower; 2. Main frame; 3. Blade; 4. Main shaft; 5. Generator; 6. Positioning hole; 7. Waist-shaped hole; 8. Measuring hole; 9. Yaw reducer; 10. Mounting ear; 11. Guide mechanism; 12. Steel cable; 13. Guide frame; 14. Upper side hole; 15. Lower side hole; 16. Connecting frame; 17. Wind measuring device; 18. Yaw gear ring; 19. Pinion; 20. Guide hole; 21. Elastic sheet; 22. Guide plate; 23. Anti-sliding block; 24. Reinforcement plate; 25. Hydraulic rod; 26. Moving frame; 27. Guide wheel; 28. Bottom plate; 29. ​​Center column; 30. Guide block; 31. U-shaped frame; 32. Lifting frame.

[0037] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the appended claims. DETAILED DESCRIPTION

[0038] The following describes in detail a wind turbine yaw system provided by the present invention, with reference to the accompanying drawings and specific embodiments. It is also noted that, for the sake of completeness, the following embodiments are optimal and preferred embodiments, and those skilled in the art may employ alternative implementations for known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0039] It should be noted that references in the specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes such specific features, structures, or characteristics. In addition, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0040] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0041] It will be understood that the meanings of “on,” “over,” and “above” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes being “on” something with intervening features or layers, and “on” or “over” means not only “on” or “above” something, but also includes being “on” or “above” something with no intervening features or layers.

[0042] Additionally, spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as illustrated in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein should be similarly interpreted accordingly.

[0043] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a yaw system of a wind turbine generator set, including a main frame 2, and also including a tower 1 and blades 3 connected to the main frame 2. A yaw gear ring 18 is fixedly installed on the upper end of the tower 1, and a plurality of yaw reducers 9 are connected to the inner bottom wall of the main frame 2. The output end of the yaw reducer 9 passes through the main frame 2 and is fixedly connected to a pinion 19 meshing with the yaw gear ring 18. There are four yaw reducers 9 to ensure that the requirements for normal operation of the equipment are met and in line with on-site operating conditions. A generator 5 is fixedly installed on the inner bottom wall of the main frame 2, and a main shaft 4 passing through the guide frame 13 is connected between the generator 5 and the blades 3. A wind measuring device 17 is fixedly installed on the inner side wall of the main frame 2. The wind drives the blades 3 to rotate, and then the rotation speed is increased by the speed increaser, and electricity is generated through the main shaft 4 and the generator 5. The wind measuring device 17 is used to detect the wind direction and transmit the detected signal to the controller in the main frame 2.

[0044] As an implementation method in this embodiment, Figure 4 and Figure 5As shown, the inner bottom wall of the main frame 2 is provided with a mounting hole for fixing the yaw reducer 9, and the mounting hole includes a positioning hole 6 and a plurality of waist-shaped holes 7. The plurality of waist-shaped holes 7 are circumferentially opened along the axis of the positioning hole 6. The yaw reducer 9 can be rotated eccentrically through one end of the mounting hole. When the pinion 19 is worn, the side clearance between the yaw gear ring 18 and the pinion 19 increases, and does not meet the range of 0.7-1.3 mm. When the side clearance between the yaw gear ring 18 and the pinion 19 needs to be adjusted, the bolts on the yaw reducer 9 are loosened by a hydraulic torque wrench to facilitate the eccentric rotation of the yaw reducer 9 through the mounting hole, and the clearance between the yaw gear ring 18 and the pinion 19 is adjusted. Side clearance, the positioning hole 6 is used to fix one end of the yaw reducer 9, and multiple waist-shaped holes 7 provide space for eccentric rotation of the yaw reducer 9. The waist-shaped hole 7 includes a measuring hole 8. The arc length of the measuring hole 8 is greater than the arc length of the waist-shaped hole 7. After the side clearance between the yaw ring gear 18 and the pinion 19 is adjusted, the feeler gauge can be inserted into the side clearance between the yaw ring gear 18 and the pinion 19 through the measuring hole 8 for measurement. When the yaw reducer 9 rotates eccentrically so that the side clearance between the yaw ring gear 18 and the pinion 19 meets the range, the bolts on the yaw reducer 9 can be tightened by the hydraulic torque wrench to firmly fix the yaw reducer 9 to the main frame 2.

[0045] As an implementation method in this embodiment, Figure 7 and Figure 10-12 As shown, a center column 29 is fixedly connected to the middle of the tower 1, and a plurality of ladders for maintenance personnel are fixedly connected to the outer wall of the center column 29, which is convenient for maintenance personnel to enter the main frame 2 for inspection and maintenance. A hydraulic rod 25 is fixedly connected to the top of the center column 29, and two steel cables 12 of equal length are provided at the output end of the hydraulic rod 25. The two ends of the steel cables 12 are respectively fixed to the hanging ears 10 of the diagonal yaw reducer 9. The output end of the hydraulic rod 25 is fixedly connected to a moving frame 26, and a guide wheel 27 for guiding the two steel cables 12 is rotatably connected in the moving frame 26. The guide wheel 27 is used to reduce the friction when the steel cables 12 are pulled. At the same time, the two ends of the steel cables 12 play an adaptive role, and the moving frame 2 6 and is fixedly connected to the inner side wall of each guide wheel 27 with a bottom plate 28. The bottom plate 28 and the corresponding steel cable 12 play a limiting role to prevent the upper steel cable 12 from interfering with the lower guide wheel 27. The hydraulic rod 25 drives the middle part of a pair of steel cables 12 to move downward, thereby driving the two ends of the steel cables 12 to pull. The inner bottom wall of the main frame 2 is connected to a guide mechanism 11 that guides the steel cables 12. By pulling the two ends of the steel cables 12 and reversing the guide mechanism 11, the yaw reducer 9 is driven to rotate eccentrically, so that the yaw reducers 9 on different sides can rotate eccentrically, and the side clearance between the yaw gear ring 18 and the pinion 19 is adjusted due to excessive side clearance, thereby reducing the wear of the pinion 19.

[0046] As an implementation method in this embodiment, Figure 6 、 Figure 7 、 Figure 10 and Figure 11 As shown, the inner top wall of the main frame 2 is fixedly connected with a guide frame 13, and four evenly distributed guide rods are extended downward from the lower end of the guide frame 13. The lower end of each guide rod is provided with a through hole that guides the steel cable 12. The through hole is used to pass the steel cable 12 and support the steel cable 12 along the vertical direction. The lower end of the guide frame 13 is fixedly connected with a connecting frame 16. The connecting frame 16 is cross-shaped, and a rib is welded at the connection with the guide rod. The multiple guide rods at the lower end of the guide frame 13 are added to the horizontal The stability of the direction, the upper end of the guide frame 13 is four rods inclined outward, and the middle parts of the four rods are fixedly connected to the same vertical rod. The four rods and one vertical rod are fixed to the inner top wall of the main frame 2, which increases the stability of the guide frame 13 when it is subjected to forces in different directions. The through holes include an upper side hole 14 inclined upward and a lower side hole 15 inclined downward. The upper side hole 14 and the lower side hole 15 are respectively opened on the two guide rods opposite to the lower end of the guide frame 13. A pair of upper side holes 14 and a pair of lower side holes 15 are fixed to the inner top wall of the main frame 2. The two gears 12 are connected by a guide wheel 27, and the piston rod of the hydraulic rod 25 pulls the two gears 12 downward at the same time through the guide wheel 27, thereby achieving equal pulling force on the two gears 12, and also plays an adaptive effect. When the pinion 19 installed on one of the yaw reducers 9 is less worn, and the pinion 19 installed on the diagonal yaw reducer 9 is more worn, at this time, the hydraulic rod 25 pulls the middle part of the steel cable 12 downward through the guide wheel 27. When the steel cable 12 is pulled, the pinion 19 with greater wear rotates a larger range, while the pinion 19 with less wear rotates a smaller range when pulled. One steel cable 12 realizes adaptive adjustment of the rotation angle of the two diagonal yaw reducers 9. The input signal of the hydraulic rod 25 is controlled by the controller, so that the piston rod contracts 0.5 mm each time the switch is turned on. After the hydraulic rod 25 is working, the staff uses a feeler gauge to measure the side clearance between the yaw gear ring 18 and the pinion 19.

[0047] By setting a hydraulic rod 25 and a steel cable 12, the hydraulic rod 25 is connected to a guide wheel 27 that guides the two steel cables 12 through rotation in a mobile frame 26, thereby reducing friction when the steel cables 12 are pulled. At the same time, both ends of the steel cables 12 play an adaptive state, and the guide frame 13 plays a supporting role when the steel cables 12 are pulled. By pulling the two ends of the steel cables 12 and reversing the guide mechanism 11, the yaw reducer 9 is driven to rotate eccentrically, so that the yaw reducers 9 on different sides can rotate eccentrically, and the side clearance between the yaw gear ring 18 and the pinion 19 can be reduced. The hydraulic rod 25 is retracted by 0.5 mm each time to reduce the wear of the pinion 19. The staff measures the side clearance between the yaw gear ring 18 and the pinion 19 through the feeler gauge and the measuring hole 8 after the hydraulic rod 25 is retracted. There is no need to rotate the yaw reducer 9 and tighten it through different bolt holes, which increases the accuracy of the entire adjustment and avoids the angle after the yaw reducer is not enough to put the side clearance between the pinion 19 and the yaw gear ring 18 into the range, resulting in increased wear of the pinion 19 and reduced transmission accuracy.

[0048] As an implementation method in this embodiment, Figure 8 、 Figure 9 and Figure 13As shown, the guide mechanism 11 includes a bridge-shaped guide block 30, both ends of which are welded to the main frame 2. The bridge-shaped guide block 30 increases the stability of the steel cable 12 when it is under pressure. The inner wall of the guide block 30 is slidably connected to the guide plate 22, and the inner wall of the guide plate 22 is fixedly connected to the anti-sliding block 23. Both ends of the anti-sliding block 23 are protruding outward and are distributed in multiple sections. When the steel cable 12 is pulled, the steel cable 12 is tightly attached to the anti-sliding block 23 and drives the guide plate 22 to slide slowly, thereby reducing the steel cable 12. 2 is pulled, the multi-stage anti-sliding block 23 increases the contact area when contacting the steel cable 12, thereby increasing the friction force. A guide hole 20 is opened on the outer wall of the guide block 30, and an elastic piece 21 is fixedly connected to the outer wall of the guide block 30. The other end of the elastic piece 21 passes through the guide hole 20 and is fixed to the guide plate 22. When the steel cable 12 is no longer pulled, one end of the elastic piece 21 applies pressure to the guide plate 22, causing the guide plate 22 to return to its initial position. At the same time, the staff can adjust the guide plate 22 through the guide hole 20. Mark the side of the plate 22 to facilitate the staff to see the length of the end of the different steel cables 12 stretched, so that the wear degree of the pinion 19 installed on the yaw reducer 9 on different sides can be read. The outer wall of the guide block 30 is fixedly connected with a reinforcing plate 24 with an arc-shaped cross section. The guide hole 20 passes through the reinforcing plate 24. The reinforcing plate 24 is also welded to the main frame 2 to increase the stability of the reinforcing plate 24. The guide block 30 is fixedly connected to the side of the tower 1 toward the middle with a U-shaped frame 31. The upper end of the guide block 30 is fixed. A hoisting frame 32 is connected and welded to the U-shaped frame 31. The hoisting frame 32 makes it convenient for the staff to pass one end of the steel cable 12 through the hole at the upper end of the hoisting frame 32. When the movable frame 26 is replaced with a clamp for clamping the steel cable 12, it is convenient to hoist the motor in the yaw reducer 9. The U-shaped frame 31 is used to increase the stability of the hoisting frame 32 when hoisting. At the same time, the U-shaped frame 31 increases the stability of the guide block 30 when using the steel cable 12, and does not affect the user's reading of the scale on the guide plate 22 through the guide hole 20.

[0049] By setting the guide mechanism 11, the bridge-shaped guide block 30 and the arc-shaped reinforcing plate 24, the strength of the overall structure is enhanced. Both ends of the multi-stage anti-sliding block 23 are convex outward, which increases the contact area with the steel cable 12, thereby increasing the friction. When the steel cable 12 is pulled, the steel cable 12 is tightly attached to the anti-sliding block 23 and drives the guide plate 22 to slide slowly, thereby reducing the wear on one end of the steel cable 12 when it is pulled. When the steel cable 12 is no longer pulled, one end of the elastic sheet 21 applies pressure to the guide plate 22, so that The guide plate 22 returns to its initial position. At the same time, the staff can mark the side of the guide plate 22 through the guide hole 20, so that the staff can see the length of the stretch of the ends of different steel cables 12, and then read the degree of wear of the pinion 19 installed on the yaw reducer 9 on different sides. The U-shaped frame 31 is used to increase the stability of the hoisting frame 32 when hoisting. At the same time, the U-shaped frame 31 increases the stability of the guide block 30 when using the steel cable 12, and does not affect the user's reading of the scale on the guide plate 22 through the guide hole 20.

[0050] The technical solution provided by the present invention is to set a hydraulic rod and a steel cable. The hydraulic rod is connected to a guide wheel that guides the two steel cables through rotation in a mobile frame, thereby reducing friction when the steel cables are pulled. At the same time, the two ends of the steel cables are in an adaptive state, and the guide frame plays a supporting role when the steel cables are pulled. By pulling the two ends of the steel cables and reversing the guide mechanism, the yaw reducer is driven to rotate eccentrically, so that the yaw reducers on different sides can be rotated eccentrically, and the side clearance between the yaw gear ring and the pinion is adjusted due to excessive side clearance, thereby reducing the wear of the pinion. After each contraction of the hydraulic rod, the staff measures the side clearance between the yaw gear ring and the pinion through a feeler gauge and a measuring hole. There is no need to tighten the yaw reducer through different bolt holes after rotating the angle, thereby increasing the accuracy of the entire adjustment and avoiding the angle after the yaw reducer is not enough to bring the pinion gear and the yaw gear into the side clearance range, resulting in increased wear of the pinion and reduced transmission accuracy.

[0051] By setting a guide mechanism, a bridge-shaped guide block and an arc-shaped reinforcement plate, the strength of the overall structure is strengthened. Both ends of the multi-section anti-sliding block are protruding outward, which increases the contact area with the steel cable, thereby increasing the friction. When the steel cable is pulled, the steel cable is close to the anti-sliding block and drives the guide plate to slide slowly, thereby reducing the wear on one end of the steel cable when it is pulled. When the steel cable is no longer pulled, one end of the elastic sheet applies pressure to the guide plate, so that the guide plate returns to its initial position. At the same time, the staff can mark the side of the guide plate through the guide hole, which is convenient for the staff to see the length of the stretch of the ends of different steel cables, so that the wear degree of the small gears installed on the yaw reducers on different sides can be read. The U-shaped frame is used to increase the stability of the lifting frame when hoisting. At the same time, the U-shaped frame increases the stability of the guide block when using the steel cable, and does not affect the user reading the scale on the guide plate through the guide hole.

[0052] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. To provide a thorough understanding of the present invention, specific details are described in detail below in connection with the preferred embodiments of the present invention, but those skilled in the art will be able to fully understand the present invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0053] Those skilled in the art will understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A yaw system for a wind turbine generator, comprising a main frame, a tower connected to the main frame, and blades; characterized in that: The upper end of the tower is fixedly mounted with a yaw gear ring, the inner bottom wall of the main frame is connected with a plurality of yaw reducers, the output end of the yaw reducer passes through the main frame and is fixedly connected with a small gear meshing with the yaw gear ring, the inner bottom wall of the main frame is provided with a mounting hole for fixing the yaw reducer, and the yaw reducer can eccentrically rotate through one end of the mounting hole; the middle of the tower is fixedly connected with a center column, the top of the center column is fixedly connected with a hydraulic rod, and the output end of the hydraulic rod is provided with two steel cables of equal length, the two ends of the steel cables are respectively fixed to the hanging ears of two diagonal yaw reducers, the hydraulic rod drives the middle parts of a pair of steel cables to move downward, and the inner bottom wall of the main frame is connected with a guide mechanism that guides the steel cables, and the yaw reducer is driven to rotate eccentrically by pulling the two ends of the steel cables and reversing the guide mechanism; The mounting hole includes a positioning hole and a plurality of waist-shaped holes, and the plurality of waist-shaped holes are circumferentially opened along the axis of the positioning hole.

2. The yaw system of a wind turbine generator set according to claim 1, characterized in that: The waist-shaped hole includes a measuring hole, and the arc length of the measuring hole is greater than the arc length of the waist-shaped hole.

3. The yaw system of a wind turbine generator set according to claim 1, characterized in that: The guide mechanism comprises a guide block in a bridge shape, and the inner side wall of the guide block is slidably connected with a guide plate.

4. The yaw system of a wind turbine generator set according to claim 3, characterized in that: The inner side wall of the guide plate is fixedly connected with an anti-sliding block, and both ends of the anti-sliding block are protruded outwards and are distributed in multiple sections.

5. The yaw system of a wind turbine generator set according to claim 4, characterized in that: A guide hole is formed on the outer side wall of the guide block, and an elastic sheet is fixedly connected to the outer side wall of the guide block. The other end of the elastic sheet passes through the guide hole and is fixed to the guide plate.

6. The yaw system of a wind turbine generator set according to claim 5, characterized in that: A reinforcing plate with an arc-shaped cross section is fixedly connected to the outer side wall of the guide block, and the guide hole passes through the reinforcing plate.

7. The yaw system of a wind turbine generator set according to claim 3, characterized in that: A U-shaped frame is fixedly connected to one side of the guide block facing the middle of the tower, and a hanging frame welded to the U-shaped frame is fixedly connected to the upper end of the guide block.

8. The yaw system of a wind turbine generator set according to claim 1, characterized in that: The inner top wall of the main frame is fixedly connected to a guide frame, and four evenly distributed guide rods extend downward from the lower end of the guide frame. The lower end of each guide rod is provided with a through hole for guiding the steel cable. The lower end of the guide frame is fixedly connected to a connecting frame, and the through hole includes an upper side hole inclined upward and a lower side hole inclined downward. The upper side hole and the lower side hole are respectively provided on two guide rods opposite to each other at the lower end of the guide frame.

9. The yaw system of a wind turbine generator set according to claim 1, characterized in that: The output end of the hydraulic rod is fixedly connected to a moving frame, and a guide wheel for guiding the two steel cables is rotatably connected inside the moving frame. A bottom plate is fixedly connected to the inner side wall of the moving frame and located under each guide wheel.

10. The yaw system of a wind turbine generator set according to claim 8, characterized in that: A generator is fixedly mounted on the inner bottom wall of the main frame, a main shaft penetrating the guide frame is connected between the generator and the blades, and a wind measuring device is fixedly mounted on the inner side wall of the main frame.

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