A wind turbine yaw braking friction element, brake pads and braking system

Abstract

This utility model discloses a wind turbine yaw braking friction element, brake pad, and braking system, relating to the field of wind power equipment braking technology. The friction element is rectangular in shape, with one side surface serving as a friction surface. The friction surface has several arc-shaped grooves with equal radii of curvature, extending to the upper and lower ends of the friction element and forming chip removal openings. The centers of the arc-shaped grooves lie on the axis of symmetry along the length of the friction element. The friction element has several sets of mounting holes penetrating its thickness. It also has at least one sensor mounting hole. This utility model, by optimizing the chip removal groove and hole structures, solves the problems of poor chip removal, difficult disassembly and positioning, and inconvenient wear monitoring in existing friction elements and brake pads, offering advantages such as good chip removal performance, 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 friction body, brake pads, and braking system. Background Technology

[0002] In the braking system of wind turbines, brake pads are a key component for yaw braking, and their performance directly affects the braking effect, safety, and service life of the system. Currently, most wind turbine brake pads use a straight groove design for the chip removal channels on the friction surface. When frictional dust is generated during braking, the direction of the straight groove does not match the natural trajectory of the debris, resulting in high flow resistance within the groove and 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 element and significantly shortening the service life of the friction element 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.

[0003] Furthermore, the friction element of existing wind turbine yaw brake pads is a one-piece, unperforated planar structure. Due to the lack of standardized positioning and fixing structures, operators need to repeatedly adjust the position to ensure precise alignment with the braking system during installation. 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, the lack of a force-bearing point requires the use of additional tools for forced separation, 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.

[0004] Furthermore, the existing yaw brake pads for wind turbines 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

[0005] To address the aforementioned technical problems in the existing technology, this utility model provides a wind power yaw braking friction element, brake pads, and braking system. The friction element has advantages such as easy removal of friction debris, quick installation and disassembly, and convenient installation of wear monitoring sensors.

[0006] The specific technical solution of this utility model is as follows:

[0007] In a first aspect, this utility model provides a wind turbine yaw braking friction body, the friction body being rectangular in shape, with one side surface of the friction body being a friction surface;

[0008] The friction surface is provided with a plurality of arc-shaped grooves, which extend to the upper and lower ends of the friction body respectively and form chip discharge ports. The center of the arc-shaped grooves is on the axis of symmetry of the friction body along its length.

[0009] The friction body is provided with a plurality of mounting holes that penetrate the thickness of the friction body;

[0010] The friction body is also provided with at least one sensor mounting hole.

[0011] In one possible implementation, the width of the arc-shaped channel is 1 / 20 to 1 / 6 of the length of the friction body, the depth is 1 / 6 to 2 / 3 of the thickness of the friction body, and the radius of curvature R is 0.5 to 2.5 times the width of the friction body.

[0012] In one possible implementation, the number of the arc-shaped channels is even, and the bending directions of two adjacent arc-shaped channels are opposite and tangent.

[0013] In one possible implementation, the number of arc-shaped channels is eight, and the number of chip discharge ports is sixteen.

[0014] In one possible implementation, the mounting hole assembly includes a threaded hole and a countersunk hole arranged coaxially, and the threaded hole and the countersunk hole are located on one side of the friction surface.

[0015] In one possible implementation, 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.

[0016] 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.

[0017] 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.

[0018] Secondly, this utility model also provides a wind turbine yaw brake pad, including a back plate and the aforementioned friction body covering the back plate, wherein the back plate is provided with back plate mounting holes that match the mounting hole group.

[0019] Thirdly, 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.

[0020] The positive and progressive effects of this utility model are as follows:

[0021] This invention optimizes chip removal performance and reduces wear and noise by setting several arc-shaped grooves and chip removal ports on the friction surface of the wind turbine yaw brake pad friction body. The installation and positioning holes, including threaded holes and countersunk holes, on the friction body solve the problem of difficult brake pad installation and removal, saving installation and removal time. Sensor mounting holes on the side of the friction body facilitate the installation of wear monitoring sensors, enabling real-time monitoring of friction body wear and improving operational safety. This invention has a simple structure and strong practicality, making it suitable for widespread application in the field of wind turbine yaw braking. Attached Figure Description

[0022] Figure 1 This is a front view of a wind turbine yaw braking friction body in an embodiment.

[0023] Figure 2 This is a cross-sectional view of a wind turbine yaw braking friction element in one embodiment.

[0024] Figure 3 This is a cross-sectional view of a wind turbine yaw braking brake pad in one embodiment.

[0025] Figure Labels

[0026] 1- Friction body, 2- Arc-shaped groove, 3- Mounting hole group, 4- Sensor mounting hole, 5- Countersunk hole, 6- Threaded hole, 7- Chip removal port, 8- Back plate, 9- Back plate threaded hole, 10- Friction surface. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] The specific technical solution of this utility model is as follows:

[0031] In a first aspect, the present invention provides a friction body 1, which is rectangular in shape and has one side surface of the friction body 1 as a friction surface 10.

[0032] The friction surface 10 is provided with several arc-shaped channels 2, which extend to the upper and lower ends of the friction body 1 and form chip discharge ports 7. The center of the arc-shaped channel 2 is on the axis of symmetry in the length direction of the friction body 1.

[0033] The friction body 1 is provided with a plurality of mounting holes 3 that penetrate the thickness of the friction body;

[0034] The friction body 1 is also provided with at least one sensor mounting hole 4.

[0035] This utility model provides a friction body 1, whose friction surface 10 features an arc-shaped groove 2. Compared to traditional straight grooves, this arc-shaped design better conforms to the natural movement trajectory of debris during friction, especially when the braking component rotates or reciprocates, as debris easily flows along the arc. The arc-shaped design utilizes centrifugal force or friction to guide debris towards both ends of the arc-shaped groove 2, reducing debris retention within the groove. The arc-shaped groove 2 extends to the upper and lower edges of the friction body 1, forming vertically oriented chip discharge ports 7 at the edges of the friction body 1. When debris flows along the arc-shaped groove 2 to both ends, it can be directly discharged from the outside of the friction body 1 through the chip discharge ports 7, preventing debris accumulation within the groove. Several through-hole mounting holes 3 on the friction body 1 serve as standardized positioning references and fixing interfaces. During installation, the precise fit between the mounting hole group 3 and external components (such as the back plate 8 and braking mechanism) allows for rapid positioning of the friction body 1 without repeated calibration. During disassembly, the mounting hole group 3 serves as a force point, enabling efficient separation with bolts and other fasteners. At least one sensor mounting hole 4 is provided on the friction body 1, providing a 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. After the sensor is installed, it can directly monitor the thickness change or wear state of the friction body 1, resulting in more accurate data feedback and solving the monitoring lag problem caused by unreasonable sensor installation position. The above-mentioned technical features work together to give the friction body 1 the advantages of easy removal of friction debris, quick installation and disassembly, and convenient installation of wear monitoring sensors, solving the problems of poor debris removal, difficult disassembly and positioning, and inconvenient wear monitoring that exist in the friction body 1 of existing wind power yaw brake pads.

[0036] In one possible implementation, the width of the arc-shaped channel 2 is 1 / 20 to 1 / 6 of the length of the friction body 1, the depth is 1 / 6 to 2 / 3 of the thickness of the friction body 1, and the radius of curvature R is 0.5 to 2.5 times the width of the friction body 1. Setting the width of the arc-shaped channel 2 to 1 / 20 to 1 / 14 of the length of the friction body 1 provides sufficient flow space for friction debris (especially larger particles), preventing debris from getting stuck due to an excessively narrow channel. Setting the depth of the arc-shaped channel 2 to 1 / 6 to 2 / 3 of the thickness of the friction body 1 can accommodate more instantaneously generated friction debris, preventing debris from overflowing onto the friction surface 10 due to an excessively shallow channel, thus avoiding secondary wear. The radius of curvature R is 1.5-2.5 times the width of the friction body 1. On the one hand, it can cover the size requirements of small to large friction bodies 1. On the other hand, it can match the motion trajectory of the friction body 1 during braking, so that the debris can flow naturally along the channel curve, reducing problems such as debris impacting the channel wall and kinetic energy loss caused by trajectory mismatch, and further reducing the chip removal resistance.

[0037] In one possible implementation, the number of arc-shaped channels 2 is even, and the curvature directions of two adjacent arc-shaped channels 2 are opposite and tangential. The opposite curvature directions and tangentiality of adjacent arc-shaped channels 2 form a network of alternating "left-handed and right-handed" channels. When the friction body 1 moves relative to the braking component (e.g., rotating or reciprocating), debris flows along the curves of the arc-shaped channels due to friction and centrifugal force: the left-handed channels guide the debris to one side, and the right-handed channels guide the debris to the other side. The combination of these two channels covers the entire area of ​​the friction surface 10, preventing debris from accumulating in a single direction.

[0038] In one possible implementation, there are eight arc-shaped channels 2 and sixteen chip discharge ports 7. The eight arc-shaped channels 2 can more precisely divide the friction surface 10 area, ensuring that debris generated at any location during friction can quickly enter the nearest arc-shaped channel 2, better avoiding localized debris accumulation caused by excessive channel spacing; while ensuring sufficient chip discharge channels, the eight arc-shaped channels 2 can also ensure sufficient contact between the friction body 1 and the brake disc, ensuring stable output of friction force; each arc-shaped channel 2 corresponds to two chip discharge ports 7, and when debris flows along the arc-shaped channel 2, it can be discharged simultaneously from the chip discharge ports 7 at both ends.

[0039] 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 10. 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 1 to components such as the back plate 8 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 1 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 10, with its opening facing the debris-generating area of ​​the friction surface 10, acting like a "funnel" to block most of the dust and debris generated by friction from entering the threaded hole 6.

[0040] In one possible implementation, 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 10. At the same time, the depth of the countersunk hole 5 to 2-3 mm is also sufficient to prevent debris (such as metal powder and friction material particles) generated by the friction surface 10 from entering the threaded hole 6.

[0041] In one possible implementation, there are two sets of mounting holes 3, located at the left and right ends of the friction body 10, respectively. The friction body 1 of a common wind turbine yaw brake pad is elongated. In dynamic yaw braking scenarios of wind turbines, the two ends of the friction body 1 are the areas subjected to the greatest force. Placing the mounting hole sets 3 at the two ends of the friction body 1 can directly resist the impact force during braking, improving the fatigue resistance of the overall connection.

[0042] In one possible implementation, the opening of the sensor mounting hole 4 is located on the side of the friction body 1 in the thickness direction, and the axis of the sensor mounting hole 4 is parallel to the friction surface 10. Setting the axis of the sensor mounting hole 4 parallel to the friction surface 10 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 1, away from the area where debris is directly generated by the friction surface 10. The debris generated by the friction surface 10 is mainly discharged to the edge through the arc-shaped channel 2, and the mounting hole opening parallel to the friction surface 10 faces the side, so the probability of this area being impacted by debris is lower, which is beneficial to the stable operation of the sensor.

[0043] Secondly, this utility model also provides a wind turbine yaw brake pad, including a back plate 8 and the aforementioned friction body 1 covering the back plate, wherein the back plate 8 is provided with back plate mounting holes that match the mounting hole group 3.

[0044] Thirdly, 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.

[0045] 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.

[0046] Example 1

[0047] This embodiment provides a wind turbine yaw braking friction body 1, such as Figure 1 and Figure 2As shown, its dimensions are 425 mm × 138 mm, suitable for wind turbine models of 2 MW and above. One side surface of the wind turbine yaw braking friction body 1 is a friction surface 10, on which eight arc-shaped grooves 2 are provided. The eight arc-shaped grooves 2 are distributed at intervals on the friction surface 10, and the bending directions of adjacent two arc-shaped grooves 2 are opposite and tangent. The diameter of the arc-shaped grooves 2 is 320 mm, the width is 8 mm, and the depth is 8 mm. The eight arc-shaped grooves 2 extend to the upper and lower edges of the friction body 1 respectively, and form chip discharge ports 7 in the upper and lower directions at the edges of the friction body 1, for a total of sixteen chip discharge ports 7. The center of the arc-shaped grooves 2 is on the axis of symmetry in the length direction of the friction body 1. During braking, friction-generated debris enters the arc-shaped channel 2 and moves towards both ends under the action of friction and centrifugal force. It is then discharged to the outside of the brake pad through the chip discharge port 7, preventing debris accumulation. The tangential arrangement of the curved sections guides the flow of debris, improving chip removal efficiency and reducing the impact noise between debris and the channel wall. Chip removal efficiency is increased by 40%, and wear rate is reduced by 25%.

[0048] Two sets of mounting holes 3, penetrating the thickness direction of the friction body 1, are provided on the friction body 1. The two sets of mounting holes 3 are located on the left and right sides of the friction body 1, respectively. Each mounting hole set 3 includes a threaded hole 6 and a countersunk hole 5, both penetrating the friction body 1. The countersunk hole 5 and the threaded hole 6 are coaxially arranged and located on one side of the friction surface 10. 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. During assembly and disassembly, the bolt passes through the countersunk hole 5 and engages with the threaded hole 6, allowing for quick positioning and fixation of the friction body 1. The countersunk hole 5 can accommodate the bolt head while preventing dust generated by friction from entering the threaded hole 6. The mounting hole sets 3 on the friction surface 10 solve the problem of difficult positioning during brake pad assembly and disassembly, saving assembly and disassembly time from the original 30 minutes to less than 10 minutes, improving assembly and disassembly efficiency by 300%.

[0049] A sensor mounting hole 4 is provided at the left end of the friction body 1. The opening of the sensor mounting hole 4 is located on the side of the friction body 1, and the axis of the sensor mounting hole 4 is parallel to the friction surface 10. A thickness sensor is installed in the sensor mounting hole 4. The ultrasonic probe of the thickness sensor corresponds to the wear path of the friction body 1 and can monitor the wear thickness of the friction body 1 in real time. When the thickness of the friction body 1 is ≤2 mm, the thickness sensor issues an alarm signal to remind the staff to replace the friction body 1 or the brake pad in time. The accuracy of the thickness sensor's early warning is 100%, avoiding sudden failure of the friction body 1.

[0050] Example 2

[0051] This embodiment provides a wind turbine yaw brake pad, including a back plate 8 and a friction body 1 covering the back plate 8.

[0052] The structure of friction body 1 is the same as that of the wind power yaw braking friction body 1 described in Example 1, such as... Figure 3 As shown, the side of the friction body 1 away from the back plate 8 is the friction surface 10. The friction surface 10 has eight arc-shaped grooves 2 with equal radii of curvature. These eight arc-shaped grooves 2 are spaced apart on the friction surface 10, and the curvature directions of adjacent arc-shaped grooves 2 are opposite and tangent. The eight arc-shaped grooves 2 extend to the upper and lower edges of the friction body 1, forming vertical chip removal openings 7 at the edges of the friction body 1. The centers of the arc-shaped grooves 2 lie on the axis of symmetry along the length of the friction body 1. The friction body 1 has two sets of mounting holes 3 penetrating the thickness direction of the friction body 1, and also has a sensor mounting hole 4.

[0053] The back plate 8 is a unique structure in this embodiment, used to support the friction body 1 and fix the friction body 1 to the wind power yaw braking system. The back plate 8 is provided with a back plate threaded hole 9 that matches the mounting hole group of the friction body 1. The back plate threaded hole 9 can be a bolt hole 6 or a stud that corresponds to the mounting hole group 3. The friction body 1 can be firmly installed on the back plate 8 through the threaded hole 6 on the friction body 1 and the threaded hole 9 on the back plate.

[0054] In practical applications, the backplate 8 is mounted on the bracket of the wind turbine yaw braking system through its own fixing structure, while the friction body 1 is connected to the assembly structure on the backplate 8 through the mounting hole group 3. When the wind turbine needs to adjust its yaw or brake, the friction surface 10 of the friction body 1 contacts the brake disc, generating friction to achieve the braking function.

[0055] This combination design of the backplate 8 and the friction element 1 ensures that the friction element 1 can be securely installed in the braking system, while also facilitating the replacement and maintenance of the friction element 1. When the friction element 1 wears down to a certain extent and needs to be replaced, only the fasteners connecting the backplate 8 and the friction element 1 need to be removed to easily replace the new friction element 1, without having to disassemble the entire braking system, thus improving maintenance efficiency.

[0056] The backplate 8 is typically made of a metal material with good strength and heat resistance, such as cast iron or steel, to ensure it can withstand significant mechanical and thermal stresses under high-intensity braking conditions. The surface of the backplate 8 can be treated with anti-corrosion coatings to adapt to various harsh weather conditions in the outdoor environment of wind turbines.

[0057] This design of wind turbine yaw brake pads combines a high-efficiency chip-removing friction body 1 with a robust and reliable backplate 8, which not only improves braking efficiency and service life, but also enhances the safety and reliability of the wind turbine yaw system, and is of great significance for the safe operation of wind turbines.

[0058] Example 3

[0059] This embodiment provides a wind turbine yaw braking system, including a wind turbine yaw braking pad and a wear monitoring sensor installed in the sensor mounting hole 4.

[0060] The structure of the wind turbine yaw brake pad in this embodiment is the same as that described in Embodiment 2, except that it includes a back plate 8 and a friction body 1 covering the back plate 8. The surface of the friction body 1 away from the back plate 8 is a friction surface 10. The friction surface 10 has eight arc-shaped grooves 2, which are spaced apart on the friction surface 10. The curvature directions of adjacent arc-shaped grooves 2 are opposite and tangent. The eight arc-shaped grooves 2 extend to the upper and lower edges of the friction body 1 and form chip discharge ports 7 in the vertical direction at the edges of the friction body 1. The center of the arc-shaped grooves 2 is on the axis of symmetry in the length direction of the friction body 1. The friction body 1 has two sets of mounting holes 3 that penetrate its thickness direction. The back plate 8 has back plate threaded holes 9 that match the mounting hole sets 3 of the friction body.

[0061] The structure of the wind turbine yaw brake pad in this embodiment differs from that described in Embodiment 2 in that the friction body 1 has multiple sensor mounting holes 4, evenly distributed within it. The multiple sensor mounting holes 4 allow for more comprehensive monitoring of wear on various parts of the brake pad, avoiding safety hazards caused by excessive localized wear. The depth of the sensor mounting holes 4 is adjustable to accommodate different wear warning thresholds. By adjusting the mounting depth of the sensors 4, different warning points can be set according to the actual operating environment and requirements, improving the system's flexibility and adaptability.

[0062] The key feature of this embodiment is that a wear monitoring sensor is installed inside the sensor mounting hole 4 of the friction body 1. The detection end of this wear monitoring sensor corresponds to the wear path of the friction body 1. This design allows for real-time monitoring of the wear condition of the friction body 1. When the friction body 1 wears to a preset threshold, the wear monitoring sensor will send a signal to remind maintenance personnel to replace the friction body 1 in a timely manner, thus avoiding safety hazards such as reduced braking performance or brake failure due to excessive wear.

[0063] 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.

[0064] 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.

[0065] The working principle of a 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 first releases the brakes, allowing the wind turbine to turn. Once it reaches the appropriate position, the yaw braking system reapplies braking force to fix the wind turbine in that position. During this process, the brake pads contact the brake disc, generating friction to achieve the braking function. As usage time increases, the brake pads gradually wear down. When the wear reaches a predetermined thickness, the wear monitoring sensor installed in the sensor mounting hole will detect this and send a signal to replace the brake pads.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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 turbine yaw braking friction element, wherein the friction element is rectangular in shape, and one side surface of the friction element is a friction surface, characterized in that, The friction surface is provided with a plurality of arc-shaped grooves, which extend to the upper and lower ends of the friction body and form chip discharge ports. The center of the arc-shaped grooves is on the axis of symmetry of the friction body along its length. The friction body is provided with a plurality of mounting holes that penetrate the thickness of the friction body; The friction body is also provided with at least one sensor mounting hole.

2. The wind power yaw braking friction body according to claim 1, characterized in that, The width of the arc-shaped channel is 1 / 20 to 1 / 6 of the length of the friction body, the depth is 1 / 6 to 2 / 3 of the thickness of the friction body, and the radius of curvature R is 0.5 to 2.5 times the width of the friction body.

3. The wind turbine yaw braking friction body according to claim 1, characterized in that, The number of the arc-shaped channels is even, and the bending directions of two adjacent arc-shaped channels are opposite and tangent.

4. The wind turbine yaw braking friction body according to claim 1, characterized in that, The number of arc-shaped channels is eight, and the number of chip discharge ports is sixteen.

5. The wind turbine yaw braking friction body according to claim 1, characterized in that, The mounting hole assembly includes a threaded hole and a countersunk hole arranged coaxially, and the countersunk hole is located on one side of the friction surface.

6. The wind turbine yaw braking friction body 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 turbine yaw braking friction body according to claim 1, 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 turbine yaw braking friction body according to claim 1, characterized in that, 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 turbine yaw braking pad, characterized in that, It includes a back plate and a friction body according to any one of claims 1-8 covering the back plate, wherein the back plate is provided with back plate mounting holes that match the mounting hole group.

10. A wind turbine yaw braking system, comprising the wind turbine yaw braking pad as described in claim 9 and a wear monitoring sensor installed in the sensor mounting hole.

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