A wind turbine slip friction yaw mechanism

Abstract

This invention discloses a sliding friction yaw mechanism for a wind turbine, relating to the field of wind turbine applications. It includes a tower and a nacelle, which are rotatably connected. An anti-detachment frame is fixedly installed on the inner wall of the tower. An annular groove is formed at the top of the anti-detachment frame, and a locking toothed ring is disposed within the groove. A locking mechanism for locking the nacelle and tower is installed on the side of the nacelle. The locking mechanism uses a mechanical expansion method to engage and lock with the anti-detachment frame. This invention, by setting up a locking mechanism and an anti-detachment frame, can improve the braking effect between the nacelle and the tower. When the wind turbine is under directional locking for a long time, the locking mechanism engages with the anti-detachment frame, using mechanical locking to temporarily replace the friction locking of the brake disc and brake caliper, reducing the continuous working time of the brake caliper and thus extending the service life of the brake disc and brake caliper.

Description

Technical Field

[0001] This invention relates to the field of wind turbine applications, specifically to a sliding friction yaw mechanism for a wind turbine. Background Technology

[0002] A wind turbine is a clean energy device that converts wind energy into electrical energy. Its core principle is to capture the kinetic energy of the airflow through the wind turbine and drive the generator to generate electricity through the transmission system. The yaw system is the "steering rudder" of the wind turbine. Its core function is to drive the nacelle to rotate around the tower so that the wind turbine is always aligned with the wind direction, thereby maximizing the capture of wind energy, while also taking into account the prevention of cable entanglement and safety protection.

[0003] The yaw system mainly includes:

[0004] Mechanical structure: Yaw bearing, connecting the nacelle and the tower, bearing vertical load (unit weight) and horizontal load (wind load), while realizing the rotation of the nacelle; Yaw drive device, consisting of motor, reducer and pinion, the pinion meshes with the outer gear ring of the yaw bearing to provide rotation power for the nacelle; Braking system, hydraulic brake calipers are used to lock the brake disc to ensure that the nacelle is locked in position when stopped, preventing it from rotating with the wind.

[0005] Control system: Wind vane sensor, installed on the top of the nacelle, collects wind direction and speed data in real time with an accuracy of ±0.5°; Yaw controller, receives sensor signals, calculates the required rotation angle and speed, controls the start and stop of the drive device, and monitors the mooring status; Angle encoder, records the nacelle rotation angle, providing position feedback for the mooring procedure and wind alignment accuracy.

[0006] The core of the yaw braking system is to achieve nacelle stability through "friction locking," rather than emergency braking. Its braking process revolves around three stages: "normal locking, dynamic release, and precise positioning." The braking effect of the yaw system is closely related to the maintenance of the brake discs and calipers, especially for offshore wind turbines. Due to the long duration of gusts at sea, typically 4-6 hours, the yaw system usually does not need to steer during this period; the brake calipers and discs simply need to remain continuously locked. In practice, when the brake calipers operate under high load for extended periods, the internal hydraulic oil can easily leak and adhere to the surface of the brake disc, causing corrosion and wear. Furthermore, the friction pads of the brake calipers, in prolonged contact with the brake disc, further accelerate wear. Therefore, for wind turbines, when the yaw system is not adjusted for extended periods or when the nacelle is locked in emergency conditions due to strong winds, using a combination of mechanical locking and traditional friction braking is more beneficial for the maintenance and use of the wind turbine. Summary of the Invention

[0007] Therefore, the purpose of this invention is to provide a sliding friction yaw mechanism for a wind turbine generator to solve the technical problems mentioned in the background.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a sliding friction yaw mechanism for a wind turbine, comprising a tower and a nacelle, wherein the tower and the nacelle are rotatably connected by a yaw bearing, the yaw bearing comprising an inner ring and an outer gear ring, wherein sliding friction occurs between the inner ring and the outer gear ring, and an anti-detachment frame is fixedly installed on the inner wall of the tower, the top of the anti-detachment frame having an annular groove, and a locking gear ring being provided in the annular groove; a locking mechanism for locking the nacelle and the tower is installed on the side of the nacelle, the locking mechanism comprising a support frame, a drive shaft rotatably connected to the top of the support frame, the drive shaft being connected to a drive assembly, and an mounting plate movably mounted on the bottom of the support frame via guide columns, the top of the mounting plate being rotatably connected to a square drive shaft, the square drive shaft and the drive shaft being connected by a [missing information - likely a typo]. A square hole is used for movable connection, allowing the square drive shaft to slide inside and rotate. The mounting plate has a threaded post internally connected to the square drive shaft, which is also movably connected to the post through a square hole, allowing the square drive shaft to slide inside and rotate. Two sets of threaded rods are rotatably connected inside the mounting plate, and these rods are connected to the square drive shaft via a bevel gear set. Two sets of movable plates are movably mounted inside the mounting plate, each threadedly connected to one of the two sets of threaded rods. Multiple guide rods are movably mounted on the sides of the movable plates, each with a locking tooth block at its end and a spring sleeved on its exterior. Multiple circular holes are provided on the sides of the movable plates to accommodate the springs.

[0009] By adopting the above technical solution and setting a locking mechanism and an anti-detachment frame, the braking effect between the nacelle and the tower can be improved. When the wind turbine is directionally locked for a long time, the locking mechanism and the anti-detachment frame are engaged to mechanically lock and temporarily replace the friction locking of the brake disc and brake caliper, reducing the continuous working time of the brake caliper and thus extending the service life of the brake disc and brake caliper.

[0010] The invention is further configured such that a brake disc is fixedly installed on the top of the tower body, a yaw bearing inner ring is fixedly installed on the top of the brake disc, a yaw bearing outer gear ring is rotatably connected inside the yaw bearing inner ring, a nacelle is fixedly installed on the top of the yaw bearing outer gear ring, and multiple yaw motors are installed on the top of the nacelle, with the multiple yaw motors and the yaw bearing inner ring being drivenly connected.

[0011] Preferably, by setting a yaw bearing to connect the tower body and the nacelle, the nacelle is rotated and installed on the top of the tower body, allowing for yaw angle adjustment.

[0012] The present invention is further configured such that multiple sets of hydraulic brake calipers are fixedly installed inside the cabin, the multiple sets of hydraulic brake calipers engage with the brake disc, and a braking relationship is formed between the multiple sets of hydraulic brake calipers and the brake disc.

[0013] Preferably, by setting up multiple sets of hydraulic brake calipers to work in coordination with the brake disc, the nacelle and the tower body can be locked together by braking friction.

[0014] The present invention is further configured such that the locking mechanism is provided in multiple sets, the support frame of each set of locking mechanisms is fixedly installed with the engine compartment, and the multiple sets of locking mechanisms and multiple sets of hydraulic brake calipers work together.

[0015] Preferably, by setting multiple locking mechanisms, mechanical locking and friction locking work together to reduce the continuous working time of the hydraulic brake caliper and extend the service life of the hydraulic brake caliper and brake disc.

[0016] The present invention is further configured such that the movable plate and the mounting plate of the locking mechanism are movably mounted together by a first limiting guide rail, and the multiple sets of engaging teeth of the locking mechanism are movably mounted together by a second limiting guide rail and the movable plate.

[0017] Preferably, by setting a first limiting guide rail and a second limiting guide rail, the movement and installation of the movable plate and the engaging tooth block are made more stable.

[0018] The present invention is further configured such that the length of the guide post is greater than the height of the mounting plate, so that the mounting plate is mounted to the outside of the guide post by gravity.

[0019] Preferably, the mounting plate is installed by setting guide columns so that the height of the mounting plate can be adjusted.

[0020] The present invention is further configured such that two sets of engaging toothed rings are provided on the inner side of the anti-detachment frame, and the two sets of engaging toothed rings correspond to the engaging toothed blocks on both sides of the locking mechanism.

[0021] Preferably, by setting two sets of engaging toothed rings and locking mechanisms to fit together, the locking effect of the anti-detachment frame and locking mechanism is improved.

[0022] The present invention is further configured such that the size of the engaging tooth block is smaller than the size of the tooth block of the engaging tooth ring.

[0023] Preferably, by setting the size of the engaging tooth block to be smaller than the size of the engaging tooth ring tooth block, regardless of which tooth block of the engaging tooth block of the locking mechanism engages with the tooth block of the engaging tooth ring, several sets of engaging tooth blocks will engage with the gap of the tooth block of the engaging tooth ring among the multiple sets of engaging tooth blocks.

[0024] The present invention is further configured such that a top pressure block is provided at the bottom of the threaded column, and both the top pressure block and the top of the movable plate are provided with an anti-slip layer.

[0025] Preferably, the locking effect of the locking mechanism and the anti-slip frame is improved by providing an anti-slip layer on the top pressure block and the movable plate.

[0026] In summary, the present invention has the following main beneficial effects:

[0027] 1. By setting a locking mechanism and an anti-detachment frame, the present invention can improve the braking effect between the nacelle and the tower. When the wind turbine is directionally locked for a long time, the locking mechanism and the anti-detachment frame are engaged to mechanically lock and temporarily replace the friction locking of the brake disc and brake caliper, thereby reducing the continuous working time of the brake caliper and extending the service life of the brake disc and brake caliper.

[0028] 2. This invention improves the stability of the tower and nacelle installation by setting a locking mechanism and an anti-detachment frame. In the prior art, the tower is fixed to the outer gear ring of the yaw bearing, and the nacelle is fixed to the inner ring of the yaw bearing. The yaw motor is located inside the nacelle. Therefore, the yaw motor operates by meshing with the outer gear ring of the yaw bearing, thereby pulling the nacelle and the inner ring of the yaw bearing to rotate within the outer gear ring of the yaw bearing. Thus, the inner and outer rings of the yaw bearing and the internal rolling elements play the role of bearing the weight of the nacelle. The load strength of the yaw bearing is directly related to the stability of the nacelle installation. If the wind turbine is used for a long time, the yaw bearing wears and the clearance increases, which will cause the nacelle to vibrate during operation. If the wind turbine encounters strong winds, the rotor will be subjected to a very large external force, which may cause the nacelle to detach from the tower in severe cases. In this application, an anti-detachment frame is fixedly installed on the inner wall of the tower, and multiple sets of locking mechanisms are fixedly installed on the inner side of the nacelle. The locking mechanism can expand and engage with the anti-detachment frame to form mechanical protection and enhance the connection strength between the nacelle and the tower. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a schematic diagram showing the distribution of the brake disc and hydraulic brake caliper of the present invention;

[0031] Figure 3 This is a schematic diagram showing the distribution of the yaw motor and the outer gear ring of the yaw bearing of the present invention;

[0032] Figure 4 For the present invention Figure 3 Enlarged view of point A in the image;

[0033] Figure 5 This is a schematic diagram of the locking mechanism structure of the present invention;

[0034] Figure 6This is a schematic diagram of the internal structure of the mounting plate of the present invention;

[0035] Figure 7 This is a schematic diagram showing the distribution of the movable plate and multiple sets of engaging teeth blocks according to the present invention;

[0036] Figure 8 This is a schematic diagram of the circular hole distribution of the present invention;

[0037] Figure 9 This is a schematic diagram showing the retracted state of the locking mechanism and the distribution of the anti-detachment frame of the present invention;

[0038] Figure 10 This is a plan view of the locking mechanism in its retracted state and the distribution of the anti-slip frame according to the present invention;

[0039] Figure 11 This is a preliminary expansion diagram of the locking mechanism of the present invention, showing the interlacing of the movable plate and the inner wall of the anti-detachment frame;

[0040] Figure 12 This is a schematic diagram showing the movement plate and the inner wall of the anti-detachment frame fitting together, further expanding the locking mechanism of the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Tower body; 2. Brake disc; 3. Yaw bearing inner ring; 4. Yaw bearing outer gear ring; 5. Nacelle; 6. Yaw motor; 7. Hydraulic brake caliper; 8. Anti-detachment frame; 9. Locking mechanism; 901. Bearing frame; 902. Drive shaft; 903. Drive assembly; 904. Guide column; 905. Mounting plate; 906. Square drive shaft; 907. Threaded column; 908. Top pressure block; 909. Threaded rod; 910. Bevel gear set; 911. Movable plate; 912. First limit guide rail; 913. Circular hole; 914. Guide rod; 915. Engaging gear block; 916. Spring; 917. Second limit guide rail; 10. Engaging gear ring. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0044] The embodiments of the present invention will now be described.

[0045] Please see Figures 1-12A sliding friction yaw mechanism for a wind turbine includes a tower body 1 and a nacelle 5. The tower body 1 and the nacelle 5 are rotatably connected by a yaw bearing. The yaw bearing includes an inner ring 3 and an outer gear ring 4, which are subjected to sliding friction. An anti-detachment frame 8 is fixedly installed on the inner wall of the tower body 1. An annular groove is formed at the top of the anti-detachment frame 8, and a locking gear ring 10 is provided in the annular groove. A locking mechanism 9 for locking the nacelle 5 and the tower body 1 is installed on the side of the nacelle 5. The locking mechanism 9 includes a support frame 901. 1. The inner wall of the cabin 5 is fixedly connected to the support frame 901. A drive shaft 902 is rotatably connected to the top of the support frame 901. The drive shaft 902 is connected to a drive assembly 903, which can drive a motor and a gear set. A mounting plate 905 is movably mounted on the bottom of the support frame 901 via a guide post 904. A square drive shaft 906 is rotatably connected to the top of the mounting plate 905. The square drive shaft 906 and the drive shaft 902 are movably fitted together by a square hole, allowing the square drive shaft 906 to slide inside the drive shaft 902, and the drive shaft 902 can... The square drive shaft 906 rotates. A threaded post 907 is internally threaded onto the mounting plate 905. The square drive shaft 906 and the threaded post 907 are also movably connected via a square hole, allowing the square drive shaft 906 to slide within the threaded post 907. The square drive shaft 902 can drive the threaded post 907 to rotate. Two sets of threaded rods 909 are rotatably connected internally to the mounting plate 905. These two sets of threaded rods 909 are connected to the square drive shaft 906 via a bevel gear set 910. Two sets of movable plates 902 are movably mounted internally on the mounting plate 905. 11. Two sets of movable plates 911 are threadedly connected to two sets of threaded rods 909 respectively. Rotating the threaded rods 909 allows the movable plates 911 to extend out from the inside of the mounting plate 905. Multiple sets of guide rods 914 are movably installed on the side of the movable plates 911, and each set of guide rods 914 has a locking tooth block 915 at its end. Springs 916 are sleeved on the outside of each set of guide rods 914. Multiple sets of circular holes 913 are opened on the side of the movable plates 911 to accommodate the springs 916. The tower body 1 and the nacelle 5 can be locked by mechanical locking using the locking mechanism 9.

[0046] Please refer to the above embodiments for further details. Figure 2 , Figure 3 and Figure 4 A brake disc 2 is fixedly installed on the top of the tower body 1. A yaw bearing inner ring 3 is fixedly installed on the top of the brake disc 2. A yaw bearing outer gear ring 4 is rotatably connected inside the yaw bearing inner ring 3. A nacelle 5 is fixedly installed on the top of the yaw bearing outer gear ring 4. Multiple yaw motors 6 are installed on the top of the nacelle 5. The multiple yaw motors 6 and the yaw bearing inner ring 3 are drivenly connected. By setting the yaw bearing to connect the tower body 1 and the nacelle 5, the nacelle 5 can be rotatably installed on the top of the tower body 1, and the yaw angle can be adjusted.

[0047] Please refer to the above embodiments for further details. Figure 2 Multiple sets of hydraulic brake calipers 7 are fixedly installed inside the nacelle 5. The multiple sets of hydraulic brake calipers 7 engage with the brake disc 2, and a braking relationship is formed between the multiple sets of hydraulic brake calipers 7 and the brake disc 2. By setting multiple sets of hydraulic brake calipers 7 to work together with the brake disc 2, the nacelle 5 and the tower body 1 can be locked together by braking friction. The multiple sets of hydraulic brake calipers 7 are connected to the hydraulic system, which is located inside the nacelle 5.

[0048] Please refer to the above embodiments for further details. Figure 1 The locking mechanism 9 is provided in multiple sets, and the support frame 901 of the multiple sets of locking mechanisms 9 is fixedly installed with the engine compartment 5. The multiple sets of locking mechanisms 9 and multiple sets of hydraulic brake calipers 7 work together. By setting multiple sets of locking mechanisms 9, the mechanical locking method and the friction locking method work together to reduce the continuous working time of the hydraulic brake calipers 7 and extend the service life of the hydraulic brake calipers 7 and the brake disc 2.

[0049] Please refer to the above embodiments for further details. Figure 7 and Figure 8 The movable plate 911 and the mounting plate 905 of the locking mechanism 9 are movably installed together by a first limiting guide rail 912, and the multiple sets of engaging teeth 915 of the locking mechanism 9 are movably installed together with the movable plate 911 by a second limiting guide rail 917. By setting the first limiting guide rail 912 and the second limiting guide rail 917, the movement and installation of the movable plate 911 and the engaging teeth 915 are more stable.

[0050] Please refer to the above embodiments for further details. Figure 5 The length of the guide post 904 is greater than the height of the mounting plate 905, so that the mounting plate 905 is movablely mounted on the outside of the guide post 904 by gravity. By setting the guide post 904 to movably mount the mounting plate 905, the height of the mounting plate 905 can be adjusted.

[0051] Please refer to the above embodiments for further details. Figure 2 The inner side of the anti-slip frame 8 is provided with two sets of engaging toothed rings 10. The two sets of engaging toothed rings 10 correspond to the engaging toothed blocks 915 on both sides of the locking mechanism 9. By setting the two sets of engaging toothed rings 10 to engage with the locking mechanism 9, the locking effect of the anti-slip frame 8 and the locking mechanism 9 is improved.

[0052] Please refer to the above embodiments for further details. Figure 9 and Figure 10The size of the engaging tooth block 915 is smaller than the size of the tooth block of the engaging tooth ring 10. By setting the size of the engaging tooth block 915 to be smaller than the size of the tooth block of the engaging tooth ring 10, no matter which tooth block of the engaging tooth block 915 of the locking mechanism 9 engages with the tooth block of the engaging tooth ring 10, there will be several sets of engaging tooth blocks 915 that engage with the gap of the tooth block of the engaging tooth ring 10.

[0053] Please refer to the above embodiments for further details. Figure 6 The bottom of the threaded column 907 is provided with a top pressure block 908, and both the top pressure block 908 and the top of the movable plate 911 are provided with anti-slip layers. By providing anti-slip layers on the top pressure block 908 and the movable plate 911, the locking effect of the locking mechanism 9 and the anti-disengagement bracket 8 is improved.

[0054] In practical operation, when the wind turbine does not yaw for a long time, such as when the offshore wind turbine encounters gusts of wind for several hours, the hydraulic brake caliper 7 will work to fit and lock with the brake disc 2, using friction to brake, thereby locking the tower body 1 and the nacelle 5.

[0055] In this application, a locking mechanism 9 and a hydraulic brake caliper 7 are configured to work together. When the wind turbine does not yaw for a long time and the hydraulic brake caliper 7 needs to work continuously, the program controls the locking mechanism 9 to switch the brake locking of the hydraulic brake caliper 7 to an electronically controlled mode, thereby reducing the continuous working time of the hydraulic brake caliper 7 and improving the service life of the hydraulic brake caliper 7 and the brake disc 2.

[0056] When the locking mechanism 9 is installed, refer to Figure 9 and Figure 10 The two sets of movable plates 911 inside the locking mechanism 9 remain in the retracted state;

[0057] When the tower body 1 and the nacelle 5 are in a constant angle yaw working state, the drive assembly 903 needs to be activated to drive the transmission shaft 902 to rotate. The transmission shaft 902 drives the square transmission shaft 906 to rotate. The square transmission shaft 906 drives the two sets of threaded rods 909 to rotate through the bevel gear set 910. The rotation of the threaded rods 909 causes the two sets of movable plates 911 to expand outward, that is, the two sets of movable plates 911 expand and extend to form a spatial interlock with the anti-detachment frame 8. At the same time, the rotation of the square transmission shaft 906 will also drive the threaded column 907 to rotate. The threaded column 907 extends from the inside of the mounting plate 905 and gets closer to the inner wall of the anti-detachment frame 8. However, the top pressure block 908 still does not contact the inner wall of the anti-detachment frame 8. At this time, for the locking mechanism 9, its two sets of movable plates 911 are in the extended state, and the drive component 903 remains locked, so that the movable plates 911 of the locking mechanism 9 always remain in the initial extended state. In this way, the entire locking mechanism 9 cannot be pulled out from the annular groove of the anti-detachment frame 8, that is, the anti-detachment frame 8 and the locking mechanism 9 cannot be separated. In this state, the locking mechanism 9 does not contact the inner wall of the anti-detachment frame 8, but it can improve the connection strength between the tower body 1 and the nacelle 5, so as to reduce the risk of the nacelle 5 separating when the wind turbine encounters a severe typhoon.

[0058] When the tower body 1 and the nacelle 5 require prolonged locking, i.e., when the locking mechanism 9 further expands and locks, the drive assembly 903 continues to drive the transmission shaft 902 to rotate. The transmission shaft 902 further drives the square transmission shaft 906 to rotate. The square transmission shaft 906 continues to drive the two sets of threaded rods 909 to rotate through the bevel gear set 910, causing the two sets of movable plates 911 to continue to expand outward. Meanwhile, the square transmission shaft 906 further drives the threaded column 907 to rotate, causing the threaded column 907 to continue to extend, allowing the top pressure block to... 908 fits against the inner wall of the anti-slip bracket 8. As the threaded column 907 continues to extend, the top pressure block 908 is squeezed by the inner wall of the anti-slip bracket 8. The threaded column 907 will slide the mounting plate 905 along the guide column 904 and lift it up as a whole. As the mounting plate 905 rises as a whole, it means that the two sets of movable plates 911 rise. That is, the movable plates 911 extend horizontally and rise to fit against the inner top wall of the anti-slip bracket 8, thereby locking the entire locking mechanism 9 and fitting and locking it against the anti-slip bracket 8 from the vertical direction.

[0059] Meanwhile, the continuous extension of the movable plate 911 will cause multiple sets of engaging tooth blocks 915 to move horizontally, so that the engaging tooth blocks 915 engage with the engaging tooth ring 10. The engaging tooth blocks 915 are installed with springs 916, and the gaps between the engaging tooth blocks 915 and the teeth of the engaging tooth ring 10 are engaged. Multiple sets of engaging tooth blocks 915 are provided, and the width of each engaging tooth block 915 is smaller than the width of the teeth of the engaging tooth ring 10. This ensures that regardless of the locking angle of the tower body 1 and the nacelle 5, several sets of engaging tooth blocks 915 can engage into the gaps of the teeth of the engaging tooth ring 10. For example, the width of the engaging tooth block 915 is half the width of the teeth of the engaging tooth ring 10, and multiple sets of engaging tooth blocks 915... The locking teeth 915 are evenly distributed along the side of the movable plate 911. The distance between adjacent locking teeth 915 is equal to 1 / 2 of the width of the locking teeth 10. This ensures that at any locking angle, at least a number of sets of locking teeth 915 can be engaged into the gaps of the locking teeth 10. At this time, the locking teeth 915 are blocked by the locking teeth 10 and cannot continue to move. The continuous horizontal movement of the movable plate 911 compresses the spring 916, shortening the distance between the outer wall of the circular hole 913 on the side of the movable plate 911 and the locking teeth 915. This continues until the movable plate 911 moves, causing the outer wall of the circular hole 913 to adhere to the locking teeth 915, mechanically squeezing the locking teeth 915. In other words, the multiple sets of locking teeth 915 of the locking mechanism 9 mechanically expand and engage with the locking teeth 10 to lock.

[0060] In summary, when the locking mechanism 9 needs to enter the locked state, the top pressure block 908 of the locking mechanism 9 is in contact with the inner wall of the anti-detachment frame 8, the movable plate 911 of the locking mechanism 9 is also in contact with the inner wall of the anti-detachment frame 8, and the multiple sets of engaging tooth blocks 915 and engaging tooth rings 10 of the locking mechanism 9 are engaged and locked. At this time, when the locking mechanism 9 expands, the anti-detachment frame 8 and the locking mechanism 9 are mechanically locked to each other, thereby locking the tower body 1 and the nacelle 5 as well.

[0061] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A sliding friction yaw mechanism for a wind turbine, comprising a tower (1) and a nacelle (5), characterized in that: The tower body (1) and the nacelle (5) are rotatably connected by a yaw bearing. The yaw bearing includes an inner ring (3) and an outer gear ring (4). The inner ring (3) and the outer gear ring (4) are rotatably connected. A brake disc (2) is fixedly installed on the top of the tower body (1). The top of the brake disc (2) is fixedly installed on the inner ring (3) of the yaw bearing. The nacelle (5) is fixedly installed on the top of the outer gear ring (4). Multiple yaw motors (6) are installed on the top of the nacelle (5). The multiple yaw motors (6) are driven and connected to the inner ring (3) of the yaw bearing. Multiple hydraulic brake calipers (7) are fixedly installed inside the nacelle (5). The multiple hydraulic brake calipers (7) engage with the brake disc (2). A braking relationship is formed between the clamp (7) and the brake disc (2), and an anti-detachment frame (8) is fixedly installed on the inner wall of the tower body (1). An annular groove is opened on the top of the anti-detachment frame (8), and a locking tooth ring (10) is provided in the annular groove. A locking mechanism (9) for locking the engine room (5) and the tower body (1) is installed on the side of the engine room (5). The locking mechanism (9) includes a support frame (901). A drive shaft (902) is rotatably connected to the top of the support frame (901). A drive assembly (903) is connected to the drive shaft (902). An installation plate (905) is movably installed on the bottom of the support frame (901) through a guide column (904). A square drive shaft (906) is rotatably connected to the top of the installation plate (905). The square drive shaft (906) and The drive shafts (902) are movably connected by a square hole, allowing the square drive shaft (906) to slide inside the drive shaft (902), and the drive shaft (902) to drive the square drive shaft (906) to rotate. The mounting plate (905) has a threaded connection to a threaded post (907), and the square drive shaft (906) and the threaded post (907) are also movably connected by a square hole, allowing the square drive shaft (906) to slide inside the threaded post (907), and the square drive shaft (906) to drive the threaded post (907) to rotate. The mounting plate (905) also has two sets of threaded rods (909) rotatably connected inside, and the two sets of threaded rods (909) and the square drive shaft (906) are connected by a bevel gear set (910). The transmission connection is provided, and two sets of movable plates (911) are movably installed inside the mounting plate (905). The two sets of movable plates (911) are respectively threadedly connected to two sets of threaded rods (909). Multiple sets of guide rods (914) are movably installed on the side of the movable plate (911), and the ends of the multiple sets of guide rods (914) are provided with engaging teeth (915). Springs (916) are sleeved on the outside of the multiple sets of guide rods (914). Multiple sets of circular holes (913) are opened on the side of the movable plate (911) to accommodate the springs (916). Multiple sets of locking mechanisms (9) are provided. The support frame (901) of the multiple sets of locking mechanisms (9) is fixedly installed with the engine compartment (5). The multiple sets of locking mechanisms (9) and multiple sets of hydraulic brake calipers (7) work together.The locking mechanism (9) is movably mounted between the movable plate (911) and the mounting plate (905) via a first limiting guide rail (912). Multiple sets of engaging teeth (915) of the locking mechanism (9) are movably mounted via a second limiting guide rail (917) and the movable plate (911). Two sets of engaging toothed rings (10) are provided on the inner side of the anti-detachment bracket (8), each set corresponding to an engaging toothed block (915) on either side of the locking mechanism (9).

2. The sliding friction yaw mechanism for a wind turbine generator according to claim 1, characterized in that: The length of the guide post (904) is greater than the height of the mounting plate (905), so that the mounting plate (905) is mounted on the outside of the guide post (904) by gravity.

3. The sliding friction yaw mechanism for a wind turbine generator according to claim 1, characterized in that: The size of the engaging tooth block (915) is smaller than the size of the tooth block of the engaging tooth ring (10).

4. The sliding friction yaw mechanism for a wind turbine generator according to claim 1, characterized in that: The bottom of the threaded column (907) is provided with a top pressure block (908), and both the top pressure block (908) and the top of the movable plate (911) are provided with an anti-slip layer.

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