Yaw brake pad made of various materials

Abstract

The invention discloses a yaw brake pad made of various materials. The yaw brake pad is composed of a steel back (1) and a friction layer (2), and the friction layer (2) is formed by sequentially arranging a heat-resistant layer (21), a friction-resistant layer (22) and a denoising protection layer (23) from inside to outside. The heat-resistant layer (21) contains boron-modified phenolic resin and vanadium trioxide, so that hardness, heat resistance and instant high temperature resistance of the friction layer are improved; the friction-resistant layer (22) contains steel wool fibers, quartz sand and potassium hexatitanate, so that friction coefficient and friction resistance of the friction layer are improved; the denoising protection layer (23) contains materials, large in nonmetal content, like flake graphite, molybdenum disulfide and antimony sulfide, so that the yaw brake pad is low in noise during working, and noise inside the yaw brake pad can be shielded. Friction performance, friction resistance and denoising effect of the yaw brake pad are obviously improved, service life of the yaw brake pad is longer than that of a common yaw brake pad, and the only defect of the yaw brake pad is that contact parts are worn slightly.

Description

Technical field [0001] The invention relates to a braking system for a wind power generator, in particular to a yaw brake pad of multiple materials. Background technique [0002] As a renewable energy source, wind energy has received more and more attention from various countries. With technological advancement and sustainable development, wind power generation has flourished all over the world. The pollution-free and renewable nature of wind power makes wind power generation in all countries. There is a lot of room for development under such policies as sustainable development and energy-saving strategies. According to the latest research report released by Deutsche Bank, global wind power development is entering a stage of rapid expansion. The wind energy industry will maintain an annual growth rate of 20% by 2015. By 2010, the total output value of the industry will increase to five times the current level. [0003] In the process of wind power generation, yaw brake discs need ...

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Problems solved by technology

[0003] In the process of wind power generation, it is necessary to use the yaw brake disc to adjust the direction of the power generation blade. The yaw of the blade is realized by contacting the brake pad in the yaw brake disc with the shaft of the wind turbine. The conventional brake pad is composed of a single material. The function of the brake pads is relatively limited, and the best braking effect cannot be exerted. Some metal materials will cause high noise due to their high hardness, and may cause serious wear on the contact parts of the brake pads; while some Fiber material, its heat resistance and wear resistance are not high, need to be replaced frequently; there is also a brake pad made of a mixture of several metals and non-metals, because the temperature of each part of the brake pad is different, in the In the middle part of the brake pad, the temperature is too high due to the inability to dissipate heat. Due to the defects of some materials that are not resistant to high temperature, the braking efficiency will be lost rapidly. The braking efficiency of this part is obviously reduced or disappeared, and the brake pad will cause a lot of noise

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