Yaw brake block and preparation method thereof

A brake pad and yaw technology, applied in the field of yaw brake pads and their preparation, can solve the problems of rust-prone linings, enhanced dual aggressiveness, unstable fan operation, etc., and achieve high compressive and shear strength. , excellent flexibility and flexibility, the effect of overcoming windmill accidents

Active Publication Date: 2012-11-14
HENGSHUI ZHONGCHENG FRICTION MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This yaw brake pad product has the following defects: one, because the filler that constitutes the yaw brake pad is 50-75% iron powder and 5-18% copper powder, its specific gravity and thermal conductivity are significantly increased, and the use of In the process, the aggressiveness to the pair is enhanced, and it is easy to rust and easily cause the lining to fall off from the steel back and cause a windmill accident; secondly, because the reinforcing material of the yaw brake pad is 5-20% quartz Sand and 1-10% silicon carbide, so it has the characteristics of high mechanical strength, large static friction moment and low wear rate, but due to the relatively high hardness of quartz sand and silicon carbide (Mohs hardness reached 7 and 9.5 respectively), Therefore, during the use of the yaw brake pad, it will seriously scratch the pair and produce huge noise, which is no longer acceptable to users
However, the brake lining prepared by using phenolic resin as adhesive has low compressive and shear strength, which makes the product crack, crack or fall off during use, and in the long-term use process, it will Due to the increase in temperature, its friction performance is attenuated, resulting in unstable operation of the fan

Method used

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  • Yaw brake block and preparation method thereof
  • Yaw brake block and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] (1) Ingredients: get 9 kilograms of nitrile modified phenolic resin, 5 kilograms of polyvinyl butyral,

[0067] It consists of 6 kg of glass fiber, 2 kg of aramid fiber and 10 kg, 10 kg, and 10 kg respectively

[0068] Fiber material composed of limestone, talc powder and coke powder mineral fiber, 15 kg of precipitated barium sulfate with stable friction coefficient, 20 kg of potassium titanate spar with sound-absorbing and noise-reducing properties, 5 kg of barite, 2 kg of Molybdenum disulfide with high-temperature friction-increasing properties is mixed with 6 kg of flake graphite, a conventional friction material;

[0069] (2) Mixing: The above-mentioned prepared binder, reinforcing material, friction performance modifier and lubricating anti-friction material are fully stirred and mixed for 20 minutes by mixing equipment;

[0070] (3) Compression molding: the mixed mixture and the steel back coated with adhesive are pressed for 15 minutes at a temperature of 160°C...

Embodiment 2

[0077] (1) Ingredients: Take 10 kg of nitrile modified phenolic resin, 4 kg of polyvinyl butyral, 5 kg of glass fiber, 3 kg of aramid fiber and 10 kg, 5 kg, and 5 kg respectively Fiber material composed of phosphate flakes, corundum and dolomite mineral fibers, 18 kg of precipitated barium sulfate with stable friction coefficient, 22 kg of potassium titanate spar with sound-absorbing and noise-reducing properties, 10 kg of barite, 3.5 kg Molybdenum disulfide with high-temperature friction-increasing properties is mixed with 12 kg of conventional friction material flake graphite;

[0078] (2) Mixing: The above prepared binder, reinforcing material, friction performance modifier and lubricating antifriction material are fully stirred and mixed for 25 minutes by mixing equipment;

[0079] (3) Compression molding: the mixed mixture and the steel back coated with adhesive are pressed for 15 minutes at a temperature of 155°C and 200kgf / cm to form a yaw brake pad. blank;

[0080] (...

Embodiment 3

[0086] (1) Ingredients: get 8 kg of nitrile modified phenolic resin, 6 kg of polyvinyl butyral, 8 kg of glass fiber, 4 kg of aramid fiber and 5 kg of fluorinated graphite, potassium Fiber material composed of feldspar and graphite mineral fiber, 12 kg of precipitated barium sulfate with stable friction coefficient characteristics, 18 kg of potassium titanate spar with sound absorption and noise reduction characteristics, 8 kg of barite, 4 kg with high temperature friction increasing characteristics Molybdenum disulfide and 10 kg of conventional friction material flake graphite are mixed together;

[0087] (2) Mixing: The above prepared binder, reinforcing material, friction performance modifier and lubricating antifriction material are fully stirred and mixed for 25 minutes by mixing equipment;

[0088] (3) Compression forming: the mixed material and the steel back coated with adhesive are pressed for 10 minutes under the temperature of 170 ℃ and 210kgf / cm to form the yaw brak...

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PUM

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Abstract

The invention belongs to the technical field of friction material used for mechanical brake and particularly discloses a yaw brake block, which adopts the main technical scheme that the yaw brake block consists of binder, reinforcing material, friction performance modifier and lubricating anti-friction material; and the yaw brake block is prepared through procedures of proportioning, mixing, rolling, heat treatment and grinding. As the friction performance modifier of the yaw brake block adopts precipitated barium sulfate, cashew nut shell oil, potassium titanate spar and barite and does not contain any metal component, thereby leading the rigidity of the prepared yaw brake block to be greatly reduced; as the binder is formed by mixing NBR modified phenolic resin and polyvinyl butyral, thereby leading the yaw brake block to have higher compressive strength and shearing strength compared with the yaw brake block prepared by only using phenolic resin as the binder.

Description

technical field [0001] The invention belongs to the technical field of friction materials for mechanical braking, and in particular relates to a yaw brake pad used on a wind power generator and a preparation method thereof. Background technique [0002] Yaw brake pads are the main accessories used in wind turbines to control their rotation direction and speed. Traditional yaw brake pads are metal powder sintered type. For example, Chinese patent application number 200810068968.2 and publication number CN101413559A disclose a yaw brake pad. The main materials constituting the brake pad include as It consists of iron powder, copper powder as filler, quartz sand and silicon carbide as reinforcement material, and tin powder as binder. This yaw brake pad product has the following defects: one, because the filler that constitutes the yaw brake pad is 50-75% iron powder and 5-18% copper powder, its specific gravity and thermal conductivity are significantly increased, and the use ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D69/02F03D11/00F03D7/00
CPCY02E10/722Y02E10/72
Inventor 刘同林李何春刘兰云柴如绪
Owner HENGSHUI ZHONGCHENG FRICTION MATERIAL
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