Sliding reinforcement yaw brake of wind generating set

Abstract

The invention discloses a wind generating set sliding reinforcement yaw brake, and relates to the technical field of wind generating equipment braking, the wind generating set sliding reinforcement yaw brake comprises a brake disc and brake bases, the brake bases are arranged on the two sides of the brake disc, wedge reinforcement assemblies are fixedly installed in the brake bases, and guide buffer assemblies are slidably installed on the wedge reinforcement assemblies; the brake base comprises an annular brake seat, the annular brake seat is arranged on the side face of the brake disc, a T-shaped groove is formed in the annular brake seat, a guide groove is formed in the inner wall of the T-shaped groove, the wedge reinforcement assembly comprises a wedge installed on the annular brake seat in a sliding mode, wedge blocks are fixedly connected to the two sides of the wedge block, and the wedge blocks are clamped with the guide groove in a sliding mode. The sliding reinforcement yaw brake of the wind generating set is high in braking force amplification efficiency, low in energy consumption, fine in braking force adjustment and high in yaw precision, through the force decomposition effect of the inclined faces of the wedge blocks, the mechanical structure has no hydraulic oil leakage risk, and the sliding reinforcement yaw brake is suitable for seaborne and low-temperature severe working conditions and the like.

Description

Technical Field

[0001] This invention relates to the field of braking technology for wind power generation equipment, specifically a slip-boosting yaw brake for wind turbine generator sets. Background Technology

[0002] Wind turbine generators require a yaw system to adjust the nacelle orientation in real time to track wind direction and maximize wind energy capture. The yaw brake is a core component ensuring precise and safe yaw action. Currently, commonly used yaw brakes for wind turbine generators are mainly divided into two types: hydraulic caliper disc brakes and mechanical expansion brakes. However, both have significant technical shortcomings in actual operation. On the one hand, hydraulic caliper disc brakes rely on a hydraulic system to provide braking force. To meet the high-load braking requirements of large units, high-power hydraulic pumps, high-pressure cylinders, and complex pipelines are required. This design not only increases the size and weight of the equipment but also poses a risk of hydraulic oil leakage. Furthermore, the viscosity of the hydraulic oil increases in low-temperature environments, which can easily lead to delayed braking response. At the same time, maintaining a high-pressure state for a long time consumes a large amount of electrical energy, which does not meet the energy-saving requirements of wind power generation equipment. On the other hand, although traditional mechanical brakes do not have the problem of hydraulic leakage, their braking force amplification effect is limited. To achieve the required braking force, the brake spring stiffness or brake disc size needs to be increased. This can lead to excessive impact loads during braking, exacerbating the wear of the brake disc and friction pads, and shortening the service life of components. In addition, this type of brake is difficult to finely adjust the braking force, and is prone to "jamming" or "overshooting" during yaw, which affects the accuracy of the unit in tracking the wind direction and reduces power generation efficiency.

[0003] With the trend of wind power generation towards higher power and larger scale, the problems of insufficient braking force, high energy consumption, high maintenance costs, and poor adaptability of existing yaw brakes are becoming increasingly prominent. Therefore, there is a need for a yaw brake that can efficiently amplify braking force through mechanical structure, while taking into account both stability and energy saving, to meet the operational requirements of large wind turbine generator sets. Summary of the Invention

[0004] The purpose of this invention is to provide a slip-boost yaw brake for wind turbine generator sets to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a skid-force-enhancing yaw brake for a wind turbine generator set, comprising a brake disc and a brake base, wherein the brake base is disposed on both sides of the brake disc, a guide buffer assembly is fixedly installed inside the brake base, a wedge force-enhancing assembly is slidably installed on the guide buffer assembly, the brake base includes an annular brake seat disposed on the side of the brake disc, a T-shaped groove is formed inside the annular brake seat, a guide groove is formed on the inner wall of the T-shaped groove, and the wedge force-enhancing assembly includes a wedge block slidably installed inside the annular brake seat, guide blocks are fixedly connected to both sides of the wedge block, and the guide blocks are slidably engaged with the guide groove.

[0006] Preferably, the brake disc is configured as an annular structure, and the brake disc is fixedly connected to the inner ring of the yaw bearing of the wind turbine generator set. The brake disc rotates synchronously with the yaw bearing of the wind turbine generator set, and annular friction surfaces are provided on both sides of the brake disc.

[0007] Preferably, the annular brake seat is provided in three groups, each group containing six annular brake seats. The six annular brake seats are respectively engaged on both sides of the brake disc, and the annular brake seats are in clearance fit with the brake disc.

[0008] Preferably, both sides of the annular brake seat are fixedly connected to a fixed bracket by bolts.

[0009] Preferably, the guide buffer assembly includes a guide rod, which is fixedly connected between the two fixed supports, and two disc springs are sleeved on the surface of the guide rod.

[0010] Preferably, two wedges are provided, and the two wedges are respectively installed on the outside of the two disc springs.

[0011] Preferably, a friction block is fixedly connected to the inner wall of the wedge.

[0012] Preferably, the friction block engages intermittently with the side of the brake disc.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention adopts a wedge structure, which generates braking force through the sliding of the wedge block, thereby realizing the braking of the yaw system of the wind turbine generator. The braking force has high amplification efficiency, low energy consumption, fine braking force adjustment, and high yaw accuracy. Through the force decomposition effect of the inclined surface of the wedge block, there is no risk of hydraulic oil leakage in the mechanical structure, making it suitable for harsh working conditions such as offshore and low temperature.

[0014] 2. This invention, through the design of guide grooves in the wedge structure, enables the wedge blocks to slide smoothly, thereby ensuring stable output of braking force and avoiding factors that affect the braking performance of the wind turbine, such as off-center loading and vibration. This results in less wear and lower maintenance costs. The brake disc surface is machined with high precision and coated with a wear-resistant coating, and the friction blocks are made of ceramic matrix composite material, which improves wear resistance by 2-3 times. At the same time, the lubrication treatment of the wedge block sliding surface and the stabilizing effect of the guide structure reduce frictional losses between components, increasing the mean time between failures (MTBF) of the brake to over 8000 hours, extending the maintenance cycle, and reducing maintenance costs by 30%-50%. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the guide groove structure of the present invention; Figure 3 This is a schematic diagram of the braking base structure of the present invention; Figure 4 This is a schematic diagram of the wedge block and disc spring structure of the present invention; Figure 5 This is a schematic diagram of the wedge and friction block structure of the present invention.

[0016] In the diagram: 1. Brake disc; 10. Brake base; 101. Annular brake seat; 102. T-slot; 103. Guide slot; 104. Fixed bracket; 105. Bolt; 20. Guide buffer assembly; 201. Guide rod; 202. Disc spring; 30. Wedge block force amplification assembly; 301. Wedge block; 302. Guide block; 303. Friction block. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1 Please see Figures 1-5This invention provides a technical solution: a wind turbine generator set skid-force-enhancing yaw brake, comprising a brake disc 1 and a brake base 10, the brake base 10 being disposed on both sides of the brake disc 1, characterized in that: a guide buffer assembly 20 is fixedly installed inside the brake base 10, and a wedge force-enhancing assembly 30 is slidably installed on the guide buffer assembly 20; the brake base 10 includes an annular brake seat 101, the annular brake seat 101 being disposed on the side of the brake disc 1, a T-shaped groove 102 being formed inside the annular brake seat 101, and a guide groove 103 being formed on the inner wall of the T-shaped groove 102; the wedge force-enhancing assembly 30 includes a wedge 301 slidably installed inside the annular brake seat 101, and guide blocks 302 being fixedly connected to both sides of the wedge 301, the guide blocks 302 being slidably engaged with the guide groove 103.

[0019] As a further limitation of the wedge force-enhancing component 30 of the present invention, the brake disc 1 is configured as an annular structure, and the brake disc 1 is fixedly connected to the inner ring of the yaw bearing of the wind turbine generator set. The brake disc 1 rotates synchronously with the yaw bearing of the wind turbine generator set. Annular friction surfaces are provided on both sides of the brake disc 1, and the surface roughness is controlled within Ra 1.6-3.2μm to ensure a stable friction coefficient.

[0020] The annular brake seat 101 is provided in three sets, each set containing six annular brake seats 101. The six annular brake seats 101 are respectively engaged with both sides of the brake disc 1, and the annular brake seats 101 and the brake disc 1 are in clearance fit. Fixed brackets 104 are fixedly connected to both sides of the annular brake seat 101 by bolts 105. Friction blocks 303 are fixedly connected to the inner wall of the wedge block 301. The friction blocks 303 are in intermittent fit with the side of the brake disc 1. The friction blocks 303 are made of ceramic-based composite friction material containing silicon carbide particle reinforcement, possessing high temperature resistance ≥350℃, high wear resistance ≤0.1mm³ / (N・m) and low noise characteristics. The brake base 10 provides mounting support for the overall structure. The annular brake seat 101 is coaxially fixed inside the fixed bracket 104. Its inner wall is machined with an annular sliding ramp with an inclination angle α of 5°-12°, which can be adjusted according to the unit load requirements. The surface of the sliding ramp is coated with a polytetrafluoroethylene wear-resistant coating to reduce the sliding friction coefficient and improve service life. The wedge block force amplification component 30 is the key to realizing the amplification of braking force. One end of the guide rod 201 is provided with a drive component, which can make the wedge block 301 slide axially along the sliding ramp under the action of the drive component. The drive component provides the initial driving force for the wedge block force amplification component 30.

[0021] The specific implementation of this embodiment is as follows: The drive component provides the initial driving force to the wedge amplification component 30, which allows the wedge block 301 to slide axially along the sliding ramp under the action of the drive component. When the wedge block 301 moves, it drives the friction block 303 to adhere to the surface of the brake disc 1, achieving yaw braking through friction. The sliding of the wedge block 301 causes the wedge brake to generate braking force, realizing the yaw system braking of the wind turbine generator. The braking force amplification efficiency is high, the energy consumption is low, the braking force adjustment is precise, and the yaw accuracy is high. Through the force decomposition effect of the ramp of the wedge block 301, there is no risk of hydraulic oil leakage in the mechanical structure, making it suitable for harsh working conditions such as offshore and low temperature. By designing the guide groove 103, the wedge block 301 can slide smoothly, thereby enabling stable output of braking force and avoiding factors that affect the braking performance of the wind turbine, such as off-center load and vibration. The wear is small and the maintenance cost is low. The surface of the brake disc 1 is machined with high precision and coated with wear-resistant material, and the friction block 303 is made of ceramic matrix composite material, which improves the wear resistance by 2-3 times. The lubrication treatment of the sliding surface of the wedge block 301 and the stabilizing effect of the guide structure reduce frictional losses between components, increasing the mean time between failures (MTBF) of the brake to over 8,000 hours, extending the maintenance cycle, and reducing maintenance costs by 30%-50%.

[0022] Example 2 Please see Figures 1-5 The present invention provides a technical solution: a slip-boost yaw brake for a wind turbine generator set. The present invention makes corresponding improvements to address the technical problems mentioned in the background art.

[0023] As a further definition of the guide buffer assembly 20 of the present invention, the guide buffer assembly 20 includes a guide rod 201, which is fixedly connected between two fixed supports 104, and two disc springs 202 are sleeved on the surface of the guide rod 201. Two wedges 301 are provided, and the two wedges 301 are respectively installed on the outside of the two disc springs 202. The guide buffer assembly 20 is used to ensure the sliding stability of the wedges 301 and to mitigate braking impact.

[0024] The specific implementation of this embodiment is as follows: the guide buffer assembly 20 is used to ensure the sliding stability of the wedge block 301 and to mitigate braking impact.

[0025] It should be noted that the specific models, working principles, and usage of the drive components and yaw bearings of wind turbine generators are well known to those skilled in the art, and will not be elaborated upon here.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A skid-boost yaw brake for a wind turbine generator set, comprising a brake disc (1) and a brake base (10), wherein the brake base (10) is disposed on both sides of the brake disc (1), characterized in that: The brake base (10) is fixedly installed with a guide buffer assembly (20), and a wedge force-enhancing assembly (30) is slidably installed on the guide buffer assembly (20). The brake base (10) includes an annular brake seat (101), which is disposed on the side of the brake disc (1). A T-shaped groove (102) is provided inside the annular brake seat (101), and a guide groove (103) is provided on the inner wall of the T-shaped groove (102). The wedge force-enhancing assembly (30) includes a wedge (301) slidably installed inside the annular brake seat (101). Guide blocks (302) are fixedly connected to both sides of the wedge (301), and the guide blocks (302) are slidably engaged with the guide groove (103).

2. The wind turbine generator slip-boosting yaw brake according to claim 1, characterized in that: The brake disc (1) is configured as an annular structure, and the brake disc (1) is fixedly connected to the inner ring of the yaw bearing of the wind turbine generator set. The brake disc (1) rotates synchronously with the yaw bearing of the wind turbine generator set, and annular friction surfaces are provided on both sides of the brake disc (1).

3. A wind turbine generator slip-boosting yaw brake according to claim 2, characterized in that: The annular brake seat (101) is provided in three groups, each group containing six annular brake seats (101). The six annular brake seats (101) are respectively engaged on both sides of the brake disc (1), and the annular brake seat (101) and the brake disc (1) are in clearance fit.

4. A wind turbine generator slip-boosting yaw brake according to claim 1, characterized in that: The annular brake seat (101) has fixed brackets (104) on both sides by bolts (105).

5. A wind turbine generator slip-boosting yaw brake according to claim 4, characterized in that: The guide buffer assembly (20) includes a guide rod (201), which is fixedly connected between the two fixed supports (104), and two disc springs (202) are sleeved on the surface of the guide rod (201).

6. A wind turbine generator slip-boosting yaw brake according to claim 1, characterized in that: Two wedges (301) are provided, and the two wedges (301) are respectively installed on the outside of the two disc springs (202).

7. A wind turbine generator slip-boosting yaw brake according to claim 1, characterized in that: A friction block (303) is fixedly connected to the inner wall of the wedge (301).

8. A wind turbine generator slip-boosting yaw brake according to claim 7, characterized in that: The friction block (303) intermittently engages with the side of the brake disc (1).

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