A wind turbine yaw brake pad and braking system

Abstract

This utility model discloses a wind turbine yaw brake pad and braking system, relating to the field of wind power equipment braking technology. The wind turbine yaw brake pad includes a back plate and a rectangular friction body covering the back plate. The side of the friction body away from the back plate is the friction surface. The friction surface is provided with several parallel straight grooves and several concentric arc grooves. The straight grooves extend along the width direction of the friction body to the upper and lower edges, and the arc grooves extend to the left and right edges. The friction body is provided with several sets of mounting holes penetrating the thickness direction of the friction body. The back plate is provided with back plate mounting holes matching the mounting hole sets. The friction body is also provided with at least one sensor mounting hole. This utility model solves the problems of poor chip removal, difficult disassembly and positioning, and inconvenient wear monitoring in existing brake pads by optimizing the chip removal groove structure and hole structure, and has the advantages of good chip removal, efficient disassembly and assembly, and high safety.

Description

Technical Field

[0001] This utility model relates to the technical field of wind power generation braking systems, and more specifically, to a wind power yaw braking pad and braking system. Background Technology

[0002] Wind power, as a clean energy source, has been widely used globally. In wind turbine generators, the yaw system is a key component ensuring the rotor faces the wind direction, while the yaw braking system is a crucial guarantee for the safe operation of the wind turbine. The yaw brake pads, as the core component of the yaw braking system, directly affect the safety and reliability of the wind turbine. Wind turbine yaw brake pads mainly consist of a backplate and friction elements. The friction elements contact the brake disc to generate friction, achieving the braking function. As wind turbines develop towards larger and more intelligent designs, the performance requirements for yaw brake pads are becoming increasingly stringent.

[0003] During yaw braking in wind turbines, when the friction surface of the brake pads contacts the brake disc, a large amount of debris is generated due to the brake disc's arc-shaped rotation around the center of the wind turbine tower. This debris includes wear powder from the friction elements and metal particles detached from the brake disc surface. Currently, most wind turbine brake pads use a single straight groove design on the friction element surface to discharge debris. However, when frictional dust is generated during braking, the mismatch between the extension direction of the straight groove and the natural trajectory of the debris during friction creates high flow resistance within the groove, making it difficult for the debris to be smoothly discharged through the straight groove design. This leads to easy accumulation of debris within the groove. Accumulated debris not only increases the contact area and frictional resistance of the friction surface, accelerating the wear rate of the friction elements and significantly shortening the service life of the friction elements and brake pads; but also, during braking, the accumulated debris causes irregular impacts and friction between the friction surface and the brake disc, generating significant noise and affecting the stability of equipment operation and the surrounding environment.

[0004] Furthermore, existing wind turbine yaw brake pads are integral, flat structures without openings. Due to the lack of standardized positioning and fixing structures, operators need to repeatedly adjust the position of the brake pads during installation to ensure precise alignment with the braking system. This not only prolongs the installation time but also may cause uneven force on the brake pads due to positioning deviations, indirectly affecting the braking effect. During disassembly, due to the lack of force points, additional tools are needed to forcibly separate the pads, which increases physical exertion and may cause damage to the brake pads or braking system due to improper operation, seriously reducing maintenance efficiency and equipment safety.

[0005] Furthermore, existing wind turbine yaw brake pads lack a dedicated sensor mounting structure, making it impossible to effectively assemble wear monitoring sensors on the pads. This results in the inability to monitor the wear status of the friction elements in real time and accurately. As the core component of the brake pads for braking, the wear of the friction elements directly affects the braking effect. When the wear exceeds the safety threshold, failure to detect and replace them in time can easily lead to brake failure, causing the wind turbine yaw system to malfunction, and even serious safety accidents such as equipment damage and shutdown. This lack of early warning forces maintenance personnel to rely on periodic inspections to determine the brake pad condition, increasing maintenance costs and creating "monitoring blind spots" during inspections, making it difficult to avoid sudden safety hazards. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a wind power yaw brake pad with an optimized structure, which addresses the shortcomings of existing wind power yaw brake pads such as poor chip removal effect, difficulty in disassembly and positioning, and inability to monitor the wear of friction elements in real time. This aims to improve chip removal effect, facilitate disassembly and positioning, and enable real-time monitoring of friction element wear.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows:

[0008] In a first aspect, this utility model provides a wind turbine yaw brake pad, comprising a back plate and a rectangular friction body covering the back plate, wherein the side of the friction body away from the back plate is a friction surface; the friction surface is provided with a plurality of parallel straight grooves and a plurality of concentric arc grooves, the straight grooves and the arc grooves intersecting each other, the straight grooves extending along the width direction of the friction body to the upper and lower ends of the friction body and forming chip discharge ports, the arc grooves extending to the left and right ends of the friction body and forming chip discharge ports, the center of the arc grooves being on the axis of symmetry in the width direction of the friction body; the friction body is provided with a plurality of mounting hole groups penetrating the thickness direction of the friction body, the back plate is provided with back plate mounting holes matching the mounting hole groups; the friction body is also provided with at least one sensor mounting hole.

[0009] In one possible implementation, there are two straight grooves and two circular arc grooves, with the two straight grooves and the two circular arc grooves being spaced apart on the friction surface.

[0010] In one possible implementation, the width of the straight groove is 1 / 50-3 / 20 of the length of the friction body, and the depth is 1 / 8-2 / 3 of the thickness of the friction body; the width of the arc groove is 1 / 50-3 / 20 of the length of the friction body, and the depth is 1 / 8-2 / 3 of the thickness of the friction body; the radius of curvature R of the arc groove is 0.5-2.5 times the length of the friction body.

[0011] In one possible implementation, the friction body has a length of 150-250 mm, a width of 100-130 mm, and a thickness of 10-40 mm; the straight groove has a width of 5-7 mm and a depth of 6-8 mm; the arc groove has a width of 5-7 mm and a depth of 6-8 mm; and the radius of curvature R of the arc groove is 130 mm ≤ R ≤ 180 mm.

[0012] In one possible implementation, the mounting hole assembly includes a threaded hole and a countersunk hole arranged coaxially, and both the threaded hole and the countersunk hole are located on one side of the friction surface.

[0013] Furthermore, the diameter of the countersunk hole is larger than the diameter of the threaded hole, and the depth of the countersunk hole is 2-3 mm.

[0014] In one possible implementation, there are two sets of mounting holes, with the two sets of mounting holes located on the left and right sides of the friction body, respectively.

[0015] In one possible implementation, the opening of the sensor mounting hole is located on the side of the friction body, and the axis of the sensor mounting hole is parallel to the friction surface.

[0016] Secondly, this utility model also provides a wind power yaw braking system, which includes the aforementioned wind power yaw braking pads and a wear monitoring sensor installed in the sensor mounting hole.

[0017] The positive and progressive effects of this utility model are as follows:

[0018] 1. An improved groove structure formed by the intersection of straight grooves and circular arc grooves is set on the friction surface, which can effectively discharge the wear dust generated during the friction process from the grooves without clogging, reducing friction surface wear, and also helping to reduce the noise generated during braking.

[0019] 2. By setting a set of mounting holes on the friction surface, the difficulties in disassembling and assembling existing brake pads and the positioning problem are effectively solved, reducing the original half-hour disassembly and assembly time to less than 10 minutes, which greatly saves time and labor.

[0020] 3. Sensor mounting holes are provided on the friction body to install wear monitoring sensors, enabling real-time monitoring of the friction body thickness and service life. When the friction body wears to its limit, the sensor will issue an alarm signal, facilitating early replacement, preventing unnecessary trouble, and improving system safety. Attached Figure Description

[0021] Figure 1 This is a front view of a wind turbine yaw brake pad in one embodiment.

[0022] Figure 2 This is a cross-sectional view of a wind turbine yaw braking brake pad in one embodiment.

[0023] Figure Labels

[0024] 1- Back plate, 2- Friction body, 3- Mounting hole group, 4- Sensor mounting hole, 5- Countersunk hole, 6- Threaded hole, 7- Chip removal port, 8- Straight groove, 9- Circular groove, 10- Back plate threaded hole, 11- Friction surface. Detailed Implementation

[0025] First, those skilled in the art should understand that the following embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0026] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0027] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] The specific technical solution of this utility model is as follows:

[0029] In a first aspect, this utility model provides a wind turbine yaw brake pad, including a back plate 1 and a friction body 2 covering the back plate 1. The side of the friction body 2 away from the back plate 1 is a friction surface 11. The friction surface 11 is provided with a plurality of parallel straight grooves 8 and a plurality of concentric arc grooves 9, and the straight grooves 8 and arc grooves 9 intersect each other. The straight grooves 8 extend along the width direction of the friction body 2 to the upper and lower edges of the friction body 2, and form chip discharge ports in the upper and lower directions at the edges of the friction body. The arc grooves 9 extend to the left and right edges of the friction body 2, and form chip discharge ports in the left and right directions at the edges of the friction body. The center of the arc groove is on the axis of symmetry in the width direction of the friction body 2. The friction body 2 is provided with a plurality of mounting hole groups 3 penetrating the thickness direction of the friction body 2. The back plate 1 is provided with back plate mounting holes that match the mounting hole groups 3. The friction body 2 is also provided with at least one sensor mounting hole 4.

[0030] The core characteristic of wind turbine yaw braking is that the movement direction of the brake disc is mainly "circular arc rotation," but due to the influence of wind turbine installation errors, wind load fluctuations, etc., there may be a small amount of "vertical micro-displacement" between the friction surface 11 and the brake disc. The combination design of straight groove 8 and circular arc groove 9 used in the wind turbine yaw brake pad provided in this utility model corresponds precisely to these two movement trajectories. The circular arc groove 9 extends along the arc direction, and its direction is consistent with the tangential direction of the brake disc rotation. When the brake disc rotates around the center, the debris generated by friction will move along the rotation direction of the brake disc (i.e., the extension direction of the circular arc groove 9) under the combined action of "friction force + centrifugal force." At this time, the circular arc groove 9 is equivalent to a "guide channel opened in accordance with the trend," and the debris can quickly slide into the circular arc groove 9 without overcoming additional resistance and be discharged along the circular arc groove 9. The straight groove 8 extending along the width direction (vertical direction) of the friction body 2 is aimed at the micro-displacement that may occur during braking (such as the small vertical sway when adjusting the yaw angle). When the friction surface 11 slides vertically relative to the brake disc, the generated debris is pushed into the straight groove 8 by the vertical frictional force. The arc groove 9 and the straight groove 8 correspond to the main motion direction and auxiliary motion direction during braking, respectively, reducing the probability of debris retention on the friction surface 11 and allowing most debris to enter the chip removal channel instantly after generation. In addition, the types of debris generated by braking are diverse (such as micron-sized powder, millimeter-sized metal particles, long strip-shaped wear fibers, etc.), and different types of debris have different "adaptability" to the chip removal channel. The combination of the straight groove 8 and the arc groove 9 can cover the discharge requirements of various types of debris through the "difference in groove shape characteristics". The straight groove 8 is suitable for "long strip-shaped / vertically oriented debris". If long strip-shaped debris (such as filaments generated by the wear of friction body fibers) is arranged in a vertical direction, it can be directly discharged after entering the straight groove 8 with the extension of the groove, and it is not easy to bend and get stuck in the groove. The "straight line" characteristic of the straight groove 8 is just right for the discharge of this type of oriented debris. The arc groove 9 is suitable for "granular / arc-shaped moving debris": under the centrifugal force of the rotating brake disc, granular debris (such as metal abrasive grains) is more likely to move in an arc direction. After entering the arc groove 9, it will roll with the arc of the groove and move quickly towards the edge chip discharge port 7. If it enters the straight groove 8, because the direction of particle movement is perpendicular to the groove shape, it may bounce and get stuck in the groove, which will slow down the discharge speed.

[0031] In addition, the friction body 2 of the wind turbine yaw brake pad features several through-hole groups 3 and a backplate positioning hole on the backplate 1 that matches the mounting hole groups 3, serving as a standardized positioning reference and fixing interface. During installation, the precise cooperation between the mounting hole groups 3, the backplate positioning holes, and the braking mechanism allows for rapid positioning of the wind turbine yaw brake pad without repeated calibration. During disassembly, the mounting hole groups 3 serve as force points, enabling efficient separation with bolts and other fasteners. At least one sensor mounting hole 4 on the friction body 2 provides dedicated assembly space for the wear monitoring sensor. The size and depth of the hole can be customized according to the sensor specifications to ensure stable sensor fixation. These combined technical features enable the wind turbine yaw brake pad to achieve advantages such as easy removal of friction debris, quick installation and disassembly, and convenient installation of wear monitoring sensors, solving problems such as poor debris removal, difficult disassembly and positioning, and inconvenient wear monitoring in existing wind turbine yaw brake pad friction bodies 2.

[0032] In one possible implementation, there are two straight grooves 8 and two circular arc grooves 9, which are spaced apart on the friction surface 11. The two straight grooves 8 and two circular arc grooves 9, spaced apart on the friction surface 11, provide ample chip removal channels for the relatively small area of ​​the friction surface 11. The intersection of the two straight grooves 8 and the two circular arc grooves 9 forms a "four-groove intersection" channel network, which can cover most of the friction surface 11, with no obvious chip removal blind spots. This avoids flow turbulence caused by channel overlap and efficiently guides debris from different locations.

[0033] In one possible implementation, the width of the straight groove 8 is 1 / 50-3 / 20 of the length of the friction body 2, and the depth is 1 / 8-2 / 3 of the thickness of the friction body. The width of the arc groove 9 is 1 / 50-3 / 20 of the length of the friction body 2, and the depth is 1 / 8-2 / 3 of the thickness of the friction body 2. The radius of curvature R of the arc groove 9 is 0.5-2.5 times the length of the friction body 2. The widths of the straight groove 8 and the arc groove 9 are limited to 1 / 50-7 / 22 of the length of the friction body 2. This provides sufficient chip removal channel capacity and adequate effective friction area, achieving a balance between chip removal and braking. The thicknesses of the straight groove 8 and the arc groove 9 are limited to 1 / 8-2 / 3 of the thickness of the friction body 2. This provides sufficient chip capacity and ensures smooth chip removal while also guaranteeing the structural strength of the friction body 2. The curvature R of the arc groove 9 is limited to 0.5-2.5 times the length of the friction body 2. This allows the arc groove 9 to better adapt to the yaw motion trajectory and ensures that the direction of the arc groove 9 is consistent with the natural movement direction of the chips. When the chips flow along the groove, they move smoothly without significant obstruction and can move efficiently towards the chip removal ports 7 on the left and right edges of the friction body 2, maximizing the directional chip removal function of the arc groove 9.

[0034] In one possible implementation, the friction body 2 has a length of 150-250 mm, a width of 100-130 mm, and a thickness of 10-40 mm. The straight groove 8 and the arc groove 9 have a width of 5-7 mm and a depth of 6-8 mm, and the radius of curvature R of the arc groove 9 is 130 mm ≤ R ≤ 180 mm. When the dimensions of the friction body 2 are within the above range, it can meet the needs of small wind turbine models.

[0035] In one possible implementation, the mounting hole group 3 includes a threaded hole 6 and a countersunk hole 5 arranged coaxially, with both the threaded hole 6 and the countersunk hole 5 located on one side of the friction surface 11. The threaded hole 6 serves as a standardized connection interface, forming a rigid fit with fasteners such as bolts. The threaded engagement facilitates precise fixing of the friction body 2 to components such as the back plate 1 and the braking mechanism. The threaded hole 6 and the countersunk hole 5 are coaxially arranged, forming a "concentric positioning reference." During installation, bolts can pass through the countersunk hole 5 along the same axis and be screwed into the threaded hole 6, ensuring the fit between the friction body 2 and the mating components and reducing uneven local stress caused by installation deviations. The countersunk hole 5 is located on one side of the friction surface 11, with its opening facing the debris-generating area of ​​the friction surface 11, acting like a "funnel" to block most of the dust and debris generated by friction from entering the threaded hole 6.

[0036] Furthermore, the diameter of the countersunk hole 5 is larger than the diameter of the threaded hole 6, and the depth of the countersunk hole 5 is 2-3 mm. Setting the diameter of the countersunk hole 5 to be larger than the diameter of the threaded hole 6 and the depth of the countersunk hole 5 to be 2-3 mm allows the head of the bolt to be embedded in the countersunk hole 5 and not protrude from the friction surface 11; at the same time, the depth of the countersunk hole 5 to be 2-3 mm is also sufficient to prevent debris (such as metal powder, friction material particles) generated by the friction surface 11 from entering the threaded hole 6.

[0037] In one possible implementation, there are two sets of mounting holes 3, located on the left and right sides of the friction body 2, respectively. The friction body 2 of a common wind turbine yaw brake pad is elongated. In dynamic braking scenarios such as wind turbine yaw, the two ends of the friction body 2 are the areas with the greatest force. Placing the mounting hole sets 3 at the two ends of the friction body 2 can directly resist the impact force during braking and improve the fatigue resistance of the overall connection.

[0038] In one possible implementation, the opening of the sensor mounting hole 4 is located on the side of the friction body 2, and the axis of the sensor mounting hole 4 is parallel to the friction surface 11. Setting the axis of the sensor mounting hole 4 parallel to the friction surface 11 allows the opening direction of the sensor mounting hole 4 (and the exposed part of the sensor) to be closer to the side of the friction body 2, away from the area where debris is directly generated by the friction surface 11. The debris generated by the friction surface 11 is mainly discharged to the edge through the straight groove 8 and the arc groove 9, while the opening of the sensor mounting hole 4, which is parallel to the friction surface 11, faces the side, and this area has a lower probability of being impacted by debris, which is beneficial to the stable operation of the sensor.

[0039] In one possible implementation, a wear monitoring sensor is installed inside the sensor mounting hole 4, with the detection end of the wear monitoring sensor corresponding to the wear path of the friction body 2. Since the wear of the friction body 2 is not uniformly distributed during long-term use, but rather concentrated on a specific path in contact with the brake disc, when the sensor detection end corresponds to this path, it can specifically monitor the wear condition of the core wear area, avoiding misjudgments caused by the monitoring position deviating from the actual wear area.

[0040] Secondly, this utility model also provides a wind power yaw braking system, which includes the aforementioned wind power yaw braking pads and a wear monitoring sensor installed in the sensor mounting hole 4.

[0041] To make the objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments are described in detail below with reference to the accompanying drawings.

[0042] Example 1

[0043] This embodiment provides a wind turbine yaw braking pad, such as Figure 1 and Figure 2 As shown, the device includes a backplate 1 and a rectangular friction body 2 covering the backplate. The backplate 1 is typically made of metal and has sufficient strength and rigidity to ensure that the brake pads do not deform or loosen during operation. The friction body 2 has a friction surface 11 on the side away from the backplate 1. The friction body 2 is 219 mm long, 110 mm wide, and 25 mm thick, and is suitable for wind turbines of 2 MW and above. The friction surface 11 has two parallel straight grooves 8 and two concentric arc grooves 9. The two straight grooves 8 and the two arc grooves 9 intersect each other. The two straight grooves are 7 mm wide and 8 mm deep, and the two arc grooves are 7 mm wide, 8 mm deep, and have a radius of curvature of 150 mm. The two straight grooves 8 and the two arc grooves 9 are spaced apart. The straight groove 8 extends along the width of the friction body 2 to the upper and lower edges of the friction body 2, forming a chip discharge port 7 in the vertical direction at the edge of the friction body. The arc groove 9 extends to the left and right edges of the friction body 2, forming a chip discharge port 7 in the horizontal direction at the edge of the friction body 2. The center of the arc groove is on the axis of symmetry in the width direction of the friction body 2. During braking, the particulate debris generated by friction enters the arc groove 9 and moves towards both ends along the arc groove 9 under the action of friction and centrifugal force, and is discharged to the outside of the brake pad through the chip discharge port 7 to avoid debris accumulation. The long strip debris generated during friction enters the straight groove 8 and is quickly discharged along the straight groove 8.

[0044] The friction body 2 has two sets of mounting holes 3 extending along its thickness direction. These two sets of mounting holes 3 are distributed at the left and right ends of the wind turbine yaw brake pad. Each mounting hole set 3 includes a threaded hole 6 and a countersunk hole 5, both penetrating the friction body 2. The countersunk hole 5 and the threaded hole 6 are coaxially aligned and located on one side of the friction surface 11. The diameter of the threaded hole 6 matches that of an M8 bolt, and the diameter of the countersunk hole 5 is larger than that of the threaded hole 6. The depth of the countersunk hole 5 is 2.5 mm. The back plate 1 has back plate threaded holes 10 that match the mounting hole sets 3. The back plate threaded holes 10 have the same pitch and diameter as the threaded holes 6. During assembly and disassembly, the bolts pass through the countersunk hole 5 and the threaded hole 6, and engage with the threaded hole 10 on the back plate. This ensures a more secure and reliable connection between the friction body 2 and the back plate 1, and also allows for quick positioning and fixing of the wind turbine yaw brake pads. This solves the problem of difficult positioning and disassembly of the brake pads, saving assembly and disassembly time from 30 minutes to less than 10 minutes, increasing efficiency by 300%. The countersunk hole 5 design ensures that the connecting bolts do not protrude from the friction surface 11, preventing scratches on the brake disc and blocking dust generated by friction from entering the threaded hole 6. Two sets of mounting holes 3 are distributed at the left and right ends, ensuring uniform force on the friction body 2 and preventing loosening or displacement during high-intensity braking.

[0045] A sensor mounting hole 4 is provided on the friction body 2. The sensor mounting hole 4 is located at the left end of the friction body 2, and its opening is located on the side of the friction body 2 in the thickness direction. The axis of the sensor mounting hole 4 is parallel to the friction surface 11. The sensor mounting hole 4 is located at a predetermined distance from the friction surface 11. This predetermined distance is usually the thickness of the brake pad when it wears down to the point of needing replacement, generally 20%-30% of the brake pad thickness. A wear monitoring sensor is installed inside the sensor mounting hole 4, and the detection end of the wear monitoring sensor corresponds to the wear path of the friction body 2. The design of the sensor mounting hole 4 allows the wear monitoring sensor to monitor the wear condition of the friction body 2 in real time. When the friction body 2 wears down to a preset threshold, the sensor will send a replacement signal to remind maintenance personnel to replace the brake pad in time, avoiding reduced braking effect or damage to the brake disc due to excessive wear. The design of the sensor mounting hole 4 being parallel to the friction surface 11 allows the sensor to accurately detect the actual wear condition of the friction body 2, improving the accuracy and reliability of monitoring.

[0046] Example 2

[0047] This embodiment provides a wind turbine yaw braking system, including wind turbine yaw brake pads and wear monitoring sensors.

[0048] The structure of the wind turbine yaw brake pad in this embodiment differs from that described in Embodiment 1 in that the thickness of the friction body 2 can be selected appropriately according to different wind turbine models. The friction material is a high-temperature resistant, high-friction coefficient composite material, which can provide stable braking force on the high-speed rotating brake disc. Multiple mounting holes are provided on the back plate 1, and the brake pad is fixed to the brake bracket with bolts. Multiple sensor mounting holes 4 are evenly distributed within the friction body 2. The multiple sensor mounting holes 4 allow for more comprehensive monitoring of the wear condition of various parts of the brake pad, avoiding safety hazards caused by excessive local wear. The diameter of the sensor mounting holes 4 is determined according to the size of the wear monitoring sensor used, generally 5-10 mm. The depth of the sensor mounting holes 4 is adjustable to accommodate different wear warning thresholds. By adjusting the sensor mounting depth, different warning points can be set according to the actual operating environment and requirements, improving the system's flexibility and adaptability. Multiple wear monitoring sensors are installed in multiple sensor mounting holes 4 to monitor the wear condition of the brake pad. When the wear at a certain point on the brake pad reaches a predetermined thickness, the sensor will send a signal to remind maintenance personnel to replace the brake pad. The wear monitoring sensor adopts an electronic inductive design, which can accurately detect the remaining thickness of the brake pads and transmit the data to the wind turbine's monitoring system.

[0049] The wind turbine yaw braking system also includes a data acquisition module, which is electrically connected to the wear monitoring sensors. The data acquisition module is responsible for receiving sensor signals, processing and analyzing the data, and transmitting the processing results to the central control system of the wind turbine.

[0050] In addition, the wind turbine yaw braking system is equipped with an early warning system. When the brake pads wear to a preset threshold, the system will issue an audible and visual alarm signal and simultaneously send the alarm information to the remote monitoring center, reminding maintenance personnel to replace the brake pads in a timely manner. The early warning system has multi-level warning functions and can issue different levels of warning signals according to the degree of brake pad wear.

[0051] The working principle of the wind turbine yaw braking system is as follows: When the wind direction changes, the wind turbine needs to adjust its yaw. At this time, the yaw braking system will first release the brake, allowing the wind turbine to turn. After adjusting to the appropriate position, the yaw braking system will reapply the braking force to fix the wind turbine in that position. During this process, the brake pads and brake discs contact to generate friction, achieving the braking function. As the usage time increases, the brake pads will gradually wear down. When the wear reaches a predetermined thickness, the wear monitoring sensor installed in the sensor mounting hole 4 will detect this state and send a signal to replace the brake pads.

[0052] The advantages of this design are: by monitoring the wear condition of the brake pads in real time, it can avoid the risk of brake failure due to excessive wear; at the same time, it avoids the waste of resources caused by premature replacement of brake pads, extends the service life of the brake pads, and reduces maintenance costs. Furthermore, since wind farms are usually located in remote areas, traditional periodic inspections are often insufficient to detect problems in a timely manner, while this automatic monitoring system can greatly improve maintenance efficiency and safety.

[0053] It should be noted that in the description of this application, the terms "inner" and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. All directional indications (such as up, down, left, right, front, back, inner, and outer) are only used to explain the relative positional relationships and movement between components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0054] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0055] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A wind power yaw brake pad, comprising a back plate and a rectangular friction body covering the back plate, characterized in that, The friction surface is located on the side of the friction body away from the back plate. The friction surface has several parallel straight grooves and several concentric arc grooves, which intersect each other. The straight grooves extend along the width of the friction body to its upper and lower ends, forming chip removal openings. The arc grooves extend to the left and right ends of the friction body, forming chip removal openings. The centers of the arc grooves lie on the axis of symmetry along the width of the friction body. The friction body has several sets of mounting holes extending through its thickness. The back plate has back plate mounting holes that match the sets of mounting holes. The friction body also has at least one sensor mounting hole.

2. The wind power yaw brake pad according to claim 1, characterized in that, The number of straight grooves and the number of circular arc grooves are two each, and the two straight grooves and the two circular arc grooves are respectively arranged at intervals on the friction surface.

3. The wind power yaw brake pad according to claim 1, characterized in that, The width of the straight groove is 1 / 50-3 / 20 of the length of the friction body, and the depth is 1 / 8-2 / 3 of the thickness of the friction body. The width of the arc groove is 1 / 50-3 / 20 of the length of the friction body, and the depth is 1 / 8-2 / 3 of the thickness of the friction body. The radius of curvature R of the arc groove is 0.5-2.5 times the length of the friction body.

4. The wind power yaw brake pad according to claim 3, characterized in that, The friction body has a length of 150-250 mm, a width of 100-130 mm, and a thickness of 10-40 mm. The straight groove has a width of 5-7 mm and a depth of 6-8 mm. The arc groove has a width of 5-7 mm and a depth of 6-8 mm. The radius of curvature R of the arc groove is 130 mm ≤ R ≤ 180 mm.

5. The wind power yaw brake pad of claim 1, wherein, The mounting hole assembly includes a threaded hole and a countersunk hole arranged coaxially, and both the threaded hole and the countersunk hole are located on one side of the friction surface.

6. The wind power yaw brake pad according to claim 5, characterized in that, The countersunk hole has a larger diameter than the threaded hole, and the depth of the countersunk hole is 2-3 mm.

7. The wind power yaw brake pad according to claim 5 or 6, characterized in that, There are two sets of mounting holes, which are located on the left and right sides of the friction body, respectively.

8. The wind power yaw brake pad of claim 1, wherein, The opening of the sensor mounting hole is located on the side of the friction body, and the axis of the sensor mounting hole is parallel to the friction surface.

9. A wind power yaw brake system, characterized in that It includes the wind turbine yaw brake pad as described in any one of claims 1-8 and a wear monitoring sensor installed in the sensor mounting hole.

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