Yaw brake disc, yaw system and wind turbine generator

Abstract

The utility model discloses a yaw brake disc, yaw system and wind turbine generator, wherein the yaw brake disc comprises a working ring, the working ring is provided with a plurality of groups of chip removal holes covering the width of a brake pad, each group of chip removal holes are distributed in an arc-shaped or non-arc-shaped interval mode, and the adjacent chip removal holes form an intersection layout in the circumferential direction. According to the utility model, the working ring is provided with a plurality of groups of chip removal holes covering the width of the brake pad, and the adjacent chip removal holes of each group of chip removal holes are intersected in the circumferential direction, so that each friction area of the brake pad can effectively remove chips, the abrasive chips generated in the braking process can be quickly and uniformly discharged through the hole channels, and the service life of the brake pad is prolonged. Abrasive dust is prevented from being accumulated on the brake disc, so that good contact between the brake pad and the brake disc is maintained, and stability and reliability of the brake effect are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power, in particular to a yaw brake disc, a yaw system and a wind turbine generator set. Background Art

[0002] The yaw system ensures that the wind turbine's rotors are always facing the wind. This maximizes wind force and wind power utilization, thereby maximizing wind energy and improving power generation efficiency. Brake pads provide braking torque for the yaw system, keeping the turbine facing the wind and generating electricity. When the turbine is about to yaw, they provide damping torque to maintain stable yaw.

[0003] At present, the following problems still exist in the yaw braking process: 1. The wear debris generated by the friction between the brake pad and the yaw brake disc is pressed on the friction surface and cannot be discharged, resulting in poor contact between the friction material of the brake pad and the friction surface of the yaw brake disc, resulting in unstable braking force generated by the brake pad; 2. The wear debris generated by the friction between the upper brake pad and the yaw brake disc remains on the yaw brake disc, and the wear debris will be pressed back into the friction surface. The repeated crushing of the wear debris will cause a glaze layer to form on the surface of the friction material. The glaze layer will cause noise and vibration during the yaw process, causing noise pollution to the surrounding environment or causing impact failure of the tower. Summary of the Invention

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and thus provide a yaw brake disc.

[0005] In order to achieve the above technical objectives, the technical solutions adopted by this utility model are as follows:

[0006] The yaw brake disc includes a working ring, which is provided with multiple groups of chip removal holes covering the width of the brake pad. Each group of chip removal holes is distributed in an arc-shaped or non-arc-shaped interval manner, and adjacent chip removal holes form an intersecting layout in the circumferential direction.

[0007] Furthermore, a scraping device is provided in the chip removal hole, and the scraping device includes a hollow upper scraping pin, a lower scraping pin and an elastic body, and the internal hollow parts of the three are interconnected to form a chip removal cavity, and the upper scraping pin and the lower scraping pin are respectively installed at both ends of the elastic body.

[0008] Furthermore, the chip removal hole is a stepped hole that is larger at the top and smaller at the bottom. The upper end of the lower scraper pin is provided with a shoulder that abuts against the inner step surface of the stepped hole. The elastomer is provided on the lower scraper pin, and the upper scraper pin is provided on the elastomer.

[0009] Furthermore, the upper end of the upper scraper pin and the lower end of the lower scraper pin are both in the shape of a retracted truncated cone, the upper end surface of the upper scraper pin and the lower end surface of the lower scraper pin are both annularly distributed with scraping grooves, the body of the upper scraper pin is provided with an annular groove, and the lower part of the upper scraper pin is annularly distributed with a number of radial through holes, and at least a portion of the radial through holes passes through the annular groove.

[0010] Furthermore, when the elastic body is in a free state, the upper end surface of the upper scraper pin and the lower end surface of the lower scraper pin protrude from the upper friction surface and the lower friction surface of the working ring respectively;

[0011] When the elastic body is in a compressed state, the upper scraper pin and the lower scraper pin are respectively retracted into the chip discharge hole.

[0012] The utility model also provides a yaw system, comprising the yaw brake disc.

[0013] The utility model also provides a wind turbine generator set, comprising the above-mentioned yaw system.

[0014] The utility model provides a chip discharge hole on the yaw brake disc, which passes through the upper friction surface and the lower friction surface of the yaw brake disc. The chip discharge hole abuts the upper friction surface and the lower friction surface. During the yaw process, the wear chips will enter the hole from the friction surface. After the friction surface leaves the hole, the wear chips in the hole fall off the yaw brake disc under the action of gravity. A scraping device 5 is installed in the hole, which can actively scrape off the wear chips tightly adhered to the friction surface, thereby realizing automatic discharge of the wear chips during the yaw process. Beneficial effects

[0015] 1. The utility model provides multiple groups of chip removal holes covering the width of the brake pad on the working ring. The adjacent chip removal holes in each group form an intersecting layout in the circumferential direction, so that each friction area of ​​the brake pad can effectively remove chips, ensuring that the wear chips generated during the braking process can be quickly and evenly discharged through the holes, avoiding the accumulation of wear chips on the brake disc, thereby maintaining good contact between the brake pad and the brake disc, and ensuring the stability and reliability of the braking effect.

[0016] 2. The utility model provides a scraping device in the chip removal hole, which can scrape off the wear chips tightly adhering to the friction surface of the brake pad to achieve chip cleaning and chip removal on the friction surface, thereby avoiding the wear chips being crushed between the friction surface of the pad and the yaw brake disc, repeatedly crushing to form a glaze layer, and avoiding sliding noise and vibration caused by the glaze layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a preferred embodiment of the utility model;

[0018] Figure 2 This is a partial schematic diagram of a group of chip removal holes in a preferred embodiment of the present invention;

[0019] Figure 3 It is a partial schematic diagram of the utility model in contact with the brake pad;

[0020] Figure 4 It is a cross-sectional view of the utility model in contact with the brake pad;

[0021] Figure 5 It is a cross-sectional view of the utility model in contact with the brake pad;

[0022] Figure 6 yes Figure 5 A partial enlarged view of

[0023] Figure 7 This is a schematic structural diagram of the upper scraper pin in a preferred embodiment of the present invention;

[0024] Figure 8 This is a schematic structural diagram of the lower scraper pin in a preferred embodiment of the present utility model;

[0025] Figure 9 This is a schematic diagram of scraping of a preferred embodiment of the utility model;

[0026] Figure 10 This is a schematic diagram of the grinding drop of a preferred embodiment of the utility model;

[0027] In the figure: working ring 1, chip removal hole 2, upper brake pad 3, lower brake pad 4, scraper device 5, upper grinding 31, lower grinding 41, upper scraper pin 51, elastic body 52, lower scraper pin 53, scraper groove 54, annular groove 511, radial through hole 512, and shoulder 531. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0029] During yaw braking, the upper brake pad 3 and the lower brake pad 4 rotate and slide around the center of the yaw brake disc, generating wear debris on the upper and lower friction surfaces of the working ring 1. The generation of wear debris is inevitable during the braking process, but excessive wear debris may affect the performance and stability of the braking system. Excessive wear debris will accumulate inside the braking system, causing the contact surface between the brake pad and the brake disc to become uneven, reducing the braking effect and possibly causing abnormal vibration or noise in the braking system. Therefore, how to effectively remove wear debris is crucial to maintaining the performance and stability of the yaw brake system.

[0030] Example 1: See Figures 1 to 3The yaw brake disc shown in the figure includes a working ring 1 with multiple sets of chip removal holes 2 extending across the width of the brake pad. Each set of chip removal holes 2 is evenly distributed in an arc shape, with adjacent chip removal holes 2 forming an intersecting pattern in the circumferential direction. The chip removal holes 2 have a minimal impact on the strength of the yaw brake disc, ensuring effective chip removal from every friction zone of the brake pad. This ensures that wear debris generated during braking is quickly and evenly discharged through the holes, preventing accumulation of wear debris on the brake disc. This maintains good contact between the brake pad and the disc, ensuring stable and reliable braking.

[0031] Example 2: Figure 4 As shown, the difference from Example 1 is that each group of chip removal holes 2 is arranged in two straight lines. Of course, other methods are also possible, as long as the chip removal holes 2 are ensured to form an intersecting layout in the circumferential direction.

[0032] Example 3: See Figures 5 to 10 As shown: a scraper device 5 is provided in the chip removal hole 2, and the scraper device 5 includes a hollow upper scraper pin 51, a lower scraper pin 53 and an elastic body 52, and the internal hollow parts of the three are interconnected to form a chip removal chamber, and the upper scraper pin 51 and the lower scraper pin 53 are respectively installed at the two ends of the elastic body 52; specifically, the chip removal hole 2 is a stepped hole with a larger upper part and a smaller lower part, and the upper end of the lower scraper pin 53 is provided with a convex shoulder 531 that abuts against the inner step surface of the stepped hole, the elastic body 52 is provided on the lower scraper pin 53, and the upper scraper pin 51 is provided on the elastic body 52; the upper end of the upper scraper pin 51 and the lower end of the lower scraper pin 53 are both in the shape of a retracted truncated cone, The upper end surface of the upper scraper pin 51 and the lower end surface of the lower scraper pin 53 are both annularly distributed with scraping grooves 54, the body of the upper scraper pin 51 is provided with an annular groove 511, and the lower part of the upper scraper pin 51 is annularly distributed with a plurality of radial through holes 512, at least a portion of the radial through holes 512 passes through the annular groove 511; when the elastomer 52 is in a free state, the upper end surface of the upper scraper pin 51 and the lower end surface of the lower scraper pin 53 respectively protrude from the upper friction surface and the lower friction surface of the working ring 1, preferably, protruding by 0.2-1mm; when the elastomer 52 is in a compressed state, the upper scraper pin 51 and the lower scraper pin 53 are respectively retracted into the chip removal hole 2.

[0033] During the yaw process, the friction surface of the brake pad will first contact the truncated conical chamfered part of the scraper pin to reduce the wear of the friction surface. The continued movement of the brake pad will compress the elastic body 52 so that the parts of the upper and lower scraper pins protruding from the working ring 1 will retract into the chip discharge hole 13. At the same time, the compressed elastic body 52 provides pressure for the upper and lower scraper pins 51 and 53. The end faces of the scraper pins will scrape the grinding chips tightly adhered to the friction surface into the chip discharge cavity, thereby realizing the chip cleaning function of the friction surface. When fine grinding chips enter the gap between the upper scraper pin and the chip discharge hole, they will fall into the annular groove 511 and enter the chip discharge cavity through the radial through hole 512. The arrangement of the annular groove 511 and the radial through hole 512 can prevent grinding chips from accumulating and jamming the upper scraper pin, thereby ensuring that the upper scraper pin can move and work smoothly. When the friction surface leaves the chip discharge hole 2, the grinding chips in the chip discharge cavity will fall under the action of gravity (see Figure 10 ) thereby realizing the self-chip removal function, and at the same time the upper scraper pin 51 and the lower scraper pin 53 are reset under the elastic force of the elastic body 52.

[0034] Example 4: The present invention also provides a yaw system, comprising the above-mentioned yaw brake disc.

[0035] Example 5: The present invention also provides a wind turbine generator set, comprising the above-mentioned yaw system.

[0036] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0037] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A yaw brake disc comprising a working ring (1), characterized in that The working ring (1) is provided with a plurality of groups of chip removal holes (2) covering the width of the brake pad, each group of chip removal holes (2) is distributed in an arc-shaped or non-arc-shaped interval manner, and adjacent chip removal holes (2) form an intersecting layout in the circumferential direction.

2. The yaw brake disc according to claim 1, characterized in that: A scraping device (5) is provided in the chip removal hole (2), and the scraping device (5) comprises a hollow upper scraping pin (51), a lower scraping pin (53) and an elastic body (52), wherein the hollow parts of the three are interconnected to form a chip removal cavity, and the upper scraping pin (51) and the lower scraping pin (53) are respectively installed at both ends of the elastic body (52).

3. The yaw brake disc according to claim 2, characterized in that: The chip removal hole (2) is a stepped hole that is larger at the top and smaller at the bottom. The upper end of the lower scraper pin (53) is provided with a convex shoulder (531) that abuts against the inner step surface of the stepped hole. The elastic body (52) is provided on the lower scraper pin (53), and the upper scraper pin (51) is provided on the elastic body (52).

4. The yaw brake disc according to claim 2, characterized in that: The upper end of the upper scraper pin (51) and the lower end of the lower scraper pin (53) are both in the shape of an inwardly contracted truncated cone, and the upper end surface of the upper scraper pin (51) and the lower end surface of the lower scraper pin (53) are both provided with scraping grooves (54) distributed in an annular manner. The body of the upper scraper pin (51) is provided with an annular groove (511), and the lower part of the upper scraper pin (51) is provided with a plurality of radial through holes (512) distributed in an annular manner, and at least a portion of the radial through hole (512) passes through the annular groove (511).

5. The yaw brake disc according to claim 2, characterized in that: When the elastic body (52) is in a free state, the upper end surface of the upper scraper pin (51) and the lower end surface of the lower scraper pin (53) protrude from the upper friction surface and the lower friction surface of the working ring (1) respectively; When the elastic body (52) is in a compressed state, the upper scraper pin (51) and the lower scraper pin (53) are respectively retracted into the chip discharge hole (2).

6. A yaw system, characterized in that: The invention comprises the yaw brake disc according to any one of claims 1 to 5.

7. A wind turbine generator system, characterized in that: Comprising the yaw system as claimed in claim 6.

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