Yaw brake device for wind turbine generator system

Abstract

The utility model belongs to wind generating set yaw brake equipment technical field, concretely provides a kind of wind generating set yaw brake device, including brake disc, brake and scrap removal subassembly, brake disc is spaced apart and is distributed with multiple brakes along the circumferential direction, two brake calipers are close to each other when brake works, make friction plate and brake disc contact braking.The upper surface of brake disc is provided with chip removal groove, and the chip removal groove allows grinding dust to be radially discharged from the upper surface of brake disc.The extension of telescopic link when the chip removal subassembly is rotated makes the abutment of cleaning member and the upper surface of brake disc, grinding dust can be cleaned into chip removal groove, to avoid accumulation.Cleaning member and chip removal groove are cross arrangement, can prevent cleaning member to be stuck in chip removal groove, ensure that brake device operates stably.

Description

Technical Field

[0001] This application belongs to the technical field of yaw braking equipment for wind turbine generator sets, specifically a yaw braking device for wind turbine generator sets. Background Technology

[0002] The yaw system of a wind turbine is the core actuator that ensures the nacelle is precisely aligned with the wind. By driving the nacelle to rotate relative to the fixed frame through the yaw system, the rotor is always in a windward state, which can make full use of wind energy and improve the power generation efficiency of the wind turbine.

[0003] When the rotor is aligned with the wind direction, a yaw brake is needed to lock the nacelle's position and prevent uncontrolled yaw of the wind turbine when wind speeds are too high. As a key locking and damping component of the yaw system, the yaw brake typically employs a hydraulically driven clamp-disc structure, generating significant friction by clamping a horizontally mounted brake disc to suppress nacelle rotation. However, in actual operation, the sliding friction between the friction pads and the brake disc not only generates a large amount of wear debris, but also, due to the inherent horizontal design of the brake disc, the debris generated on the upper surface of the disc is difficult to fall off naturally, easily accumulating and hardening on the disc surface, resulting in a smooth glaze on the friction pad surface. This problem persists with the long-term operation of the wind turbine, causing changes in the friction coefficient of the brake disc, which in turn leads to increased operating vibration, noise, and wear. Utility Model Content

[0004] Based on the above-mentioned technical problems, this application provides a yaw braking device for wind turbine generator sets to solve the technical problem in the prior art that wear debris generated on the upper surface of the brake disc easily accumulates and hardens on the upper surface of the brake disc.

[0005] To achieve the above objectives, the technical solution adopted in this application is: to provide a yaw braking device for a wind turbine generator set, comprising: The brake disc is a horizontally arranged annular shape. The upper surface of the brake disc is provided with a plurality of chip removal grooves spaced apart along its own circumference. The chip removal grooves extend radially along the brake disc and penetrate the outer side surface of the brake disc. Multiple brakes are spaced apart along the circumference of the brake disc on the inner ring of the brake disc; each brake includes two brake calipers arranged vertically opposite each other, forming a clamping space between the two brake calipers to accommodate the brake disc, and a friction pad is provided on the side of the brake caliper facing the brake disc; and At least one scraper assembly is disposed between the two brakes. The scraper assembly includes a telescopic rod and a cleaning member. The cleaning member is vertically and flexibly disposed above the brake disc via the telescopic rod. When the chip discharge groove is located below the cleaning member, the cleaning member and the chip discharge groove are arranged intersectingly.

[0006] In one possible implementation, the brake disc includes a plurality of brake pads, which are sequentially connected.

[0007] In one possible implementation, the brake pad is arc-shaped, with a first connecting portion extending circumferentially above one end of the brake pad and a second connecting portion extending circumferentially below the other end, wherein the first connecting portion of the preceding brake pad is located above the second connecting portion of the following brake pad.

[0008] In one possible implementation, the first connecting part and the second connecting part are respectively provided with connecting holes, and the connecting holes of the first connecting part and the second connecting part, which are opposite each other, are coaxially corresponding and are provided with connecting bolts.

[0009] In one possible implementation, a gap exists between the first connecting portion of the preceding brake pad and the following brake pad, the gap forming the chip removal groove.

[0010] In one possible implementation, multiple scraper assemblies are provided and distributed along the circumferential direction of the brake disc, with one scraper assembly provided every other one or more of the brakes.

[0011] In one possible implementation, a heat insulation layer is provided between the brake caliper and the friction pad.

[0012] In one possible implementation, the brake caliper is provided with a plurality of friction pads, and heat dissipation grooves are formed between adjacent friction pads.

[0013] In one possible implementation, the wind turbine yaw braking device further includes a mounting plate, which is annular, and the brake and the telescopic rod are respectively disposed on the mounting plate.

[0014] In one possible implementation, the cleaning component is a scraper or a brush.

[0015] Compared with the prior art, the beneficial effects of the yaw braking device for wind turbine generators provided in this application are: The yaw braking device for wind turbine generators provided in this application includes a brake disc, brakes, and a chip scraper assembly. Multiple brakes are spaced apart along the circumference of the brake disc. When the brakes are engaged, two brake calipers approach each other, causing the friction pads to contact the brake disc for braking. A chip removal groove is formed on the upper surface of the brake disc, allowing wear debris to be discharged radially from the upper surface of the brake disc. When the brake disc rotates, the telescopic rod of the chip scraper assembly extends, causing the scraping component to abut against the upper surface of the brake disc, effectively sweeping the wear debris into the chip removal groove and preventing accumulation. The scraping component and the chip removal groove are arranged in a crisscross pattern to prevent the scraping component from getting stuck in the chip removal groove, ensuring stable operation of the braking device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the yaw braking device for a wind turbine generator set provided in Embodiment 1 of this application; Figure 2 This is a partial enlarged view of the scraping assembly in Embodiment 1 of this application; Figure 3 This is a schematic diagram of the brake structure in Embodiment 1 of this application; Figure 4 This is a schematic diagram of the structure of the yaw braking device for a wind turbine generator provided in Embodiment 2 of this application; Figure 5 This is a schematic diagram of the brake disc structure in Embodiment 2 of this application; Figure 6 This is an exploded view of the assembly of the two brake pads in Embodiment 2 of this application; Explanation of reference numerals in the attached figures: 10. Brake disc; 11. Brake pad; 111. First connecting part; 112. Second connecting part; 113. Connecting hole; 114. Connecting bolt; 12. Chip removal groove; 20. Brake; 21. Brake caliper; 22. Friction pad; 221. Heat dissipation groove; 23. Heat insulation layer; 30. Chip scraper assembly; 31. Telescopic rod; 32. Cleaning component; 40. Mounting plate. Detailed Implementation

[0018] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0019] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0020] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0023] Please refer to the following: Figures 1 to 6 The following describes the wind turbine generator braking device provided in Embodiment 1 and Embodiment 2 of this application.

[0024] Please see Figure 1 , Figure 2 and Figure 3 Embodiment 1 provides a yaw braking device for a wind turbine generator set, including a brake disc 10, a brake 20, and a scraper assembly 30.

[0025] The brake disc 10 is a horizontally arranged annular shape and is fixedly connected to the nacelle of the wind turbine, allowing it to rotate together with the nacelle. Multiple chip removal grooves 12 are spaced apart along the circumference of the upper surface of the brake disc 10. These grooves extend radially and penetrate the outer surface of the brake disc 10. During rotation of the brake disc 10, powdery abrasive particles in the chip removal grooves 12 are discharged from the outer surface of the brake disc 10 under the action of centrifugal force and vibration.

[0026] The brake disc 10 can be made of existing materials. During installation, the brake disc 10 can be fixedly connected to the yaw bearing or other structural components using bolts and fasteners. A chip removal groove 12 is formed on the upper surface of the brake disc 10. There are no specific restrictions on the shape, number, and size of the chip removal groove 12; users can set it according to their actual needs. For example, the cross-section of the chip removal groove 12 can be rectangular, trapezoidal, or V-shaped, with rounded corners at the bottom. The bottom surface of the chip removal groove 12 can be a flat surface or a sloping surface that slopes downwards along the outer side. The width of the chip removal groove 12 can be 2-5 mm, and the depth can be 3-10 mm. The chip removal grooves 12 can be evenly spaced or densely arranged in areas of the brake disc 10 where wear debris is easily generated.

[0027] Multiple brakes 20 are spaced apart along the circumference of the brake disc 10 on its inner ring. Each brake 20 includes two brake calipers 21 arranged vertically opposite each other about the brake disc 10, forming a clamping space between them to accommodate the brake disc 10. Friction pads 22 are provided on the side of each brake caliper facing the brake disc 10. A hydraulic cylinder and piston are internally installed in each brake 20. The brake 20 is connected to the hydraulic pump station of the wind turbine generator via hydraulic lines and valves. Power is provided by the hydraulic pump station, and the piston drives the brake calipers 21 to move, thus clamping and releasing the brake calipers 21.

[0028] To facilitate heat dissipation, the friction plates 22 on the brake caliper 21 are block-shaped, and each brake caliper 21 is provided with multiple friction plates 22, with heat dissipation grooves 221 formed between adjacent friction plates 22.

[0029] To prevent the heat from the friction pad 22 from being conducted to the inside of the brake 20 and causing damage to the internal seals, a heat insulation layer 23 can be provided between the brake caliper 21 and the friction pad 22. The heat insulation layer 23 can be made of materials with heat insulation capabilities, such as rock wool, ceramic fiber or other composite heat insulation materials. The heat insulation layer 23 can reduce the heat transferred from the friction pad 22 to the inside of the brake 20 and reduce the probability of oil leakage failure due to seal damage.

[0030] The brake 20 can be a product with existing technology. There are no specific restrictions on its specific specifications, installation method and hydraulic pipeline configuration. Users can set it up according to their actual situation.

[0031] A scraper assembly 30 is located between two brakes 20, and there can be one or more of them. The scraper assembly 30 includes a telescopic rod 31 and a cleaning component 32. The cleaning component 32 is located at the bottom end of the telescopic rod 31 and is vertically and flexibly positioned above the brake disc 10 via the telescopic rod 31. When the chip discharge groove 12 is located below the cleaning component 32, the cleaning component 32 and the chip discharge groove 12 are arranged intersectingly. The telescopic rod 31 can be driven by electric, hydraulic or pneumatic means to achieve the lifting movement; the cleaning component 32 can be designed with a shape that matches the chip discharge groove 12 (such as a strip scraper or a brush). The long axis direction of the cleaning component 32 is not parallel to that of the chip discharge groove 12, so that the cleaning component 32 and the chip discharge groove 12 intersect, preventing the cleaning component 32 from getting stuck in the chip discharge groove 12.

[0032] When multiple scraper assemblies 30 are provided, they are evenly distributed along the circumference, with one scraper assembly 30 spaced apart from one or more brakes 20. When the cleaning element 32 is a scraper, a rigid scraper (such as carbon steel or hard alloy) or a flexible scraper (such as rubber) can be selected. When the cleaning element 32 is a brush, a wire brush or a nylon brush can be selected. Scrapers and brushes can be selected or combined according to actual working conditions. For ease of maintenance, the cleaning element 32 can be designed with a quick-change structure for easy replacement and adjustment.

[0033] The wear debris below the brake disc 10 can fall off automatically under the influence of gravity and is not easy to accumulate. Therefore, the scraper assembly 30 usually only needs to be installed above the brake disc 10. Of course, if necessary, the scraper assembly 30 can also be installed below the brake disc 10 to clean the lower surface of the brake disc 10.

[0034] like Figure 1 As shown, the yaw braking device of the wind turbine generator also includes a mounting plate 40, which is annular. The brake 20 and the telescopic rod 31 are respectively mounted on the mounting plate 40. The mounting plate 40 can be an integral annular type or a split type. The mounting plate 40 is provided with positioning holes and threaded holes for fixing the brake 20 and the telescopic rod 31.

[0035] Please see Figure 4 , Figure 5 and Figure 6 In Embodiment 2, the difference from Embodiment 1 lies in the shape and structure of the brake disc 10. Specifically, the brake disc 10 adopts a split structure, consisting of multiple brake pads 11 connected sequentially.

[0036] The number of brake pads 11 can be 4-12. The brake pads 11 are arc-shaped. A first connecting portion 111 is formed on the upper part of one end of the brake pad 11 along the circumferential direction, and a second connecting portion 112 is formed on the lower part of the other end along the circumferential direction. The first connecting portion 111 of the preceding brake pad 11 overlaps and is fixed above the second connecting portion 112 of the following brake pad 11. There is a gap between the first connecting portion 111 of the preceding brake pad 11 and the following brake pad 11, and the gap forms a chip removal groove 12, which does not require additional machining.

[0037] The first connecting part 111 and the second connecting part 112 are each provided with a connecting hole, and the connecting holes 113 of the upper and lower opposite first connecting parts 111 and second connecting parts 112 are also coaxially corresponding. A connecting bolt 114 is provided in the connecting hole 113, and the connecting bolt 114 passes through the connecting hole 113 of the upper first connecting part 111 and is threadedly engaged with the connecting hole 113 of the lower second connecting part 112. It should be noted that the connecting hole 113 of the first connecting part 111 should be a countersunk hole to accommodate the nut of the connecting bolt 114. Multiple connecting holes 113 can be provided to ensure connection strength and alignment accuracy.

[0038] Sensors can be installed on the friction pads 22 or brake disc 10 as needed to monitor wear conditions and improve the level of intelligence. The sensors are existing wear sensors; when the wear exceeds a threshold, an alarm is triggered to remind maintenance personnel to replace them.

[0039] It is understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of each combined embodiment will not be repeated here. After this description, it can be considered that the present utility model specification has recorded each combined embodiment and can support different combined embodiments.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A yaw braking device for a wind turbine generator set, characterized in that, include: The brake disc (10) is a horizontally arranged ring. The upper surface of the brake disc (10) is provided with a plurality of chip removal grooves (12) spaced apart along its own circumference. The chip removal grooves (12) extend radially along the brake disc (10) and penetrate the outer side surface of the brake disc (10). Multiple brakes (20) are spaced apart along the circumference of the brake disc (10) on the inner ring of the brake disc (10); each brake (20) includes two brake calipers (21) arranged vertically opposite each other, forming a clamping space between the two brake calipers (21) to accommodate the brake disc (10), and each brake caliper (21) has a friction pad (22) on the side facing the brake disc (10); and At least one scraper assembly (30) is disposed between the two brakes (20). The scraper assembly (30) includes a telescopic rod (31) and a cleaning member (32). The cleaning member (32) is vertically and vertically disposed above the brake disc (10) via the telescopic rod (31). When the chip discharge groove (12) is located below the cleaning member (32), the cleaning member (32) and the chip discharge groove (12) are arranged crosswise.

2. The yaw braking device for a wind turbine generator set according to claim 1, characterized in that, The brake disc (10) includes a plurality of brake pads (11), which are connected in sequence.

3. The yaw braking device for a wind turbine generator set according to claim 2, characterized in that, The brake pad (11) is arc-shaped. A first connecting portion (111) is formed on the upper part of one end of the brake pad (11) along the circumferential direction, and a second connecting portion (112) is formed on the lower part of the other end along the circumferential direction. The first connecting portion (111) of the previous brake pad (11) is located above the second connecting portion (112) of the next brake pad (11).

4. The yaw braking device for a wind turbine generator set according to claim 3, characterized in that, The first connecting part (111) and the second connecting part (112) are respectively provided with connecting holes (113). The connecting holes (113) of the first connecting part (111) and the second connecting part (112) which are opposite each other are opposite to each other, and connecting bolts (114) are inserted into the opposite connecting holes (113).

5. The yaw braking device for a wind turbine generator set according to claim 3, characterized in that, There is a gap between the rear end face of the first connecting portion (111) of the preceding brake pad (11) and the following brake pad (11), and the gap forms the chip removal groove (12).

6. The yaw braking device for a wind turbine generator set according to claim 1, characterized in that, Multiple scraper assemblies (30) are provided and distributed along the circumferential direction of the brake disc (10), with one scraper assembly (30) provided every other brake (20).

7. The yaw braking device for a wind turbine generator set according to claim 1, characterized in that, A heat insulation layer (23) is provided between the brake caliper (21) and the friction plate (22).

8. The yaw braking device for a wind turbine generator set according to claim 1, characterized in that, The brake caliper (21) is provided with a plurality of friction plates (22), and heat dissipation grooves (221) are formed between adjacent friction plates (22).

9. The yaw braking device for a wind turbine generator set according to claim 1, characterized in that, The yaw braking device of the wind turbine generator set also includes a mounting plate (40), which is annular, and the brake (20) and the telescopic rod (31) are respectively mounted on the mounting plate (40).

10. The yaw braking device for a wind turbine generator set according to claim 1, characterized in that, The cleaning component (32) is a scraper or a brush.

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