Yaw brake disc, yaw system and wind turbine generator

Abstract

The invention discloses a yaw brake disc, a yaw system and a wind turbine generator, 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 are arranged in an intersecting mode in the circumferential direction. The multiple sets of chip removal holes covering the width of the brake pad are formed in the working ring, and the adjacent chip removal holes in each set of chip removal holes form the intersecting layout in the circumferential direction, so that each friction area of the brake pad can effectively remove chips, it is ensured that abrasive chips generated in the braking process can be rapidly and evenly 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 present invention relates to the technical field of wind power generation, and in particular to a yaw brake disc, a yaw system and a wind turbine generator set. Background Art

[0002] The yaw system can ensure that the impeller of the wind turbine is always in the front wind state. In the front wind state, the wind turbine receives the maximum wind force and the wind power utilization efficiency is the highest, thereby maximizing the use of wind energy and improving power generation efficiency. The brake pad provides braking torque for the yaw system to keep the wind turbine in the wind power generation state. When the wind turbine is about to yaw, it provides damping torque to make the wind turbine yaw smoothly.

[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 form a glaze layer 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 object of the present invention is to overcome the deficiencies of the prior art, thereby providing a yaw brake disc.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows: The yaw brake disc comprises a working ring, on which a plurality of groups of chip removal holes covering the width of the brake pad are provided, each group of chip removal holes are distributed in an arc-shaped or non-arc-shaped interval manner, and adjacent chip removal holes form an intersecting layout in the circumferential direction.

[0006] Furthermore, a scraping device is provided in the chip removal hole, and the scraping device includes a hollow upper scraper pin, a lower scraper pin and an elastic body, and the internal hollow parts of the three are interconnected to form a chip removal cavity, and the upper scraper pin and the lower scraper pin are respectively installed at both ends of the elastic body.

[0007] 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.

[0008] 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 provided with scraping grooves distributed in annular form, the body of the upper scraper pin is provided with an annular groove, and the lower part of the upper scraper pin is provided with a plurality of radial through holes distributed in annular form, and at least a portion of the radial through holes passes through the annular groove.

[0009] 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; 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.

[0010] The present invention also provides a yaw system, comprising the yaw brake disc.

[0011] The present invention also provides a wind turbine generator set, comprising the above-mentioned yaw system.

[0012] The present invention 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 to actively scrape off the wear chips tightly attached to the friction surface, thereby realizing automatic discharge of the wear chips during the yaw process. Beneficial Effects

[0013] 1. The present invention arranges multiple groups of chip removal holes covering the width of the brake pad on the working ring, and the adjacent chip removal holes of each group of chip removal holes 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.

[0014] 2. The present invention provides a scraping device in the chip removal hole, which can scrape off the wear debris 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 debris being crushed between the friction surface of the pad and the yaw brake disc, and repeatedly crushing to form a glaze layer, thereby avoiding sliding noise and vibration caused by the glaze layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a preferred embodiment of the present invention; Figure 2 It is a partial schematic diagram of a group of chip removal holes in a preferred embodiment of the present invention; Figure 3 is a partial schematic diagram of the present invention in contact with the brake pad; Figure 4 is a cross-sectional view of the present invention in contact with a brake pad; Figure 5 is a cross-sectional view of the present invention in contact with a brake pad; Figure 6 yes Figure 5 A partial enlarged view of Figure 7 2 is a schematic diagram of the structure of the upper scraper pin in a preferred embodiment of the present invention; Figure 8 2 is a schematic diagram of the structure of the lower scraper pin in a preferred embodiment of the present invention; Fig. 9 is a schematic diagram of scraping of a preferred embodiment of the present invention; Fig.10 It is a schematic diagram of grinding and falling of a preferred embodiment of the present invention; In the figure: working ring 1, chip removal hole 2, upper brake pad 3, lower brake pad 4, scraper device 5, upper grinder 31, lower grinder 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

[0016] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below with reference to specific diagrams.

[0017] During the yaw braking process, the upper brake pad 3 and the lower brake pad 4 rotate and slide around the center of the yaw brake disc, and wear debris is generated on the upper and lower friction surfaces of the working ring 1. The generation of wear debris is an inevitable phenomenon in the braking process, but too much wear debris may affect the performance and stability of the braking system. Too much 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 may cause abnormal vibration or noise in the braking system. Therefore, how to effectively remove the wear debris is crucial to maintaining the performance and stability of the yaw braking system.

[0018] Example 1: See Figures 1 to 3 The yaw brake disc shown includes a working ring 1, on which a plurality of groups of chip removal holes 2 covering the width of the brake pad are provided, each group of chip removal holes 2 is evenly distributed in an arc shape, and adjacent chip removal holes 2 form an intersecting layout in the circumferential direction. The design of the chip removal holes 2 has little effect on the strength of the yaw brake disc, 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 hole, 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.

[0019] 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.

[0020] Example 3: See Figures 5 to 10As 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 abutting against the inner step surface of the stepped hole, the elastic body 52 is arranged on the lower scraper pin 53, and the upper scraper pin 51 is arranged 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 provided with scraping grooves 54 in annular shape, 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 in annular shape, and at least a part of the radial through holes 512 penetrates 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.

[0021] During the yaw process, the friction surface of the brake pad will first contact the truncated cone-shaped 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 scraper pin and the lower scraper pin protruding from the working ring 1 will retract into the chip removal hole 13. At the same time, the compressed elastic body 52 provides pressure for the upper scraper pin 51 and the lower scraper pin 53. The end face of the scraper pin will scrape the grinding chips tightly adhered to the friction surface into the chip removal 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 removal hole, they will fall into the annular groove 511 and enter the chip removal cavity through the radial through hole 512. The setting of the annular groove 511 and the radial through hole 512 can prevent the 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 removal hole 2, the grinding chips in the chip removal cavity will fall under the action of gravity (see Fig.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.

[0022] Embodiment 4: The present invention also provides a yaw system, comprising the above-mentioned yaw brake disc.

[0023] Embodiment 5: The present invention also provides a wind turbine generator set, comprising the above-mentioned yaw system.

[0024] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features 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 attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0025] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description 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 may also be appropriately combined to form other implementation modes 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 scraper device (5) is provided in the chip removal hole (2), the scraper device (5) comprising a hollow upper scraper pin (51), a lower scraper 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 scraper pin (51) and the lower scraper pin (53) are respectively mounted at two 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, 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 holes (512) penetrates 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 removal hole (2).

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

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

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