Yaw brake block material for wind driven generator and preparing method of yaw brake block material

A technology for wind turbines and brake pads, applied in mechanical equipment, chemical instruments and methods, friction linings, etc., can solve the problems of easy rust, high cost, noise pollution and other problems of friction pads, and achieve stable friction coefficient and manufacturing cost Low, low braking noise effect

Inactive Publication Date: 2018-09-21
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of friction plate has the characteristics of high friction coefficient, long service life, good temperature resistance, etc., and is especially suitable for use under heavy load conditions. Serious, high-cost defects
Compared with powder metallurgy friction materials, resin-based friction materials have a series of advantages such as small specific gravity, less damage to the dual disk, low braking noise, and low price. Therefore, resin-based friction materials are gradually used instead of powder metallurgy friction materials at home and abroad, such as China Patent No.: 201010178175.3, 201010515077.4, 201310024189.3, etc., but these friction plates all contain copper fibers, steel fibers or heavy metal compounds (antimony sulfide, etc.), which cause the friction plates to rust easily, and howling is easy to occur during braking. The generated grinding dust will cause heavy metal pollution such as copper

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation process is as follows:

[0033] 1) Weigh 11.1g of boron modified phenolic resin, 0.6g of nitrile rubber modified phenolic resin, 34g of calcium sulfate whiskers, 2.5g of alumina, 3.5g of graphite, 13.9g of vermiculite, 2.5g of zinc oxide, nanometer dioxide Add 1.2g of silicon and 3.7g of barite into a high-speed mixer and stir for 2 minutes at high speed. Then weigh 10.2 g of aramid pulp and add it to a high-speed mixer and continue stirring for 2 minutes.

[0034] 2) Pour the homogeneously mixed raw materials into a mold, heat press at 180°C and 30MPa for 1 hour, and then cool with the furnace. During the hot pressing process, multiple outgassing operations are performed to release the gas generated during the hot pressing sintering process.

[0035] 3) Demould the cooled embryo body and put it in an oven for post-curing to release residual stress. The curing process is: 120°C for 0.5 hours, 140°C for 0.5 hours, 160°C for 0.5 hours, 180°C for 1 hour, ...

Embodiment 2

[0037] The preparation process is as follows:

[0038] 1) Weigh 10.3g of boron modified phenolic resin, 0.5g of nitrile rubber modified phenolic resin, 32g of calcium sulfate whiskers, 8g of alumina, 3.2g of graphite, 12.9g of vermiculite, 2.8g of zinc oxide, nanometer dioxide Add 1.6g of silicon and 3.5g of barite into a high-speed mixer and stir for 2 minutes at high speed. Then weigh 9.5 g of aramid pulp and add it to a high-speed mixer to continue stirring for 1.5 minutes.

[0039] 2) Pour the homogeneously mixed raw materials into a mold, hot press at 180°C and 35MPa for 1.2 hours, and then cool with the furnace. During the hot pressing process, multiple outgassing operations are performed to release the gas generated during the hot pressing sintering process.

[0040] 3) Demould the cooled embryo body and put it in an oven for post-curing to release residual stress. The curing process is: 120°C for 0.5 hours, 140°C for 0.5 hours, 160°C for 0.5 hours, 180°C for 1 hour, ...

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Abstract

The invention discloses a yaw brake block material for a wind driven generator. The yaw brake block material comprises components including, by mass, 8-12 parts of boron modified phenolic resin, 0.5-3parts of nitrile rubber modified phenolic resin, 25-35 parts of calcium sulfate crystal whiskers, 8-12 parts of aramid pulp, 2-8 parts of aluminum oxide, 3-5 parts of graphite, 10-15 parts of vermiculite, 2-5 parts of zinc oxide, 1-3 parts of nanosilicon dioxide and 2-5 parts of barite. The invention further discloses a preparing method of the material. A yaw brake block does not contain metal and heavy metal compounds, the environmental requirement is met, the yaw brake block material has the advantages of appropriate and stable friction coefficients, the high compressive strength, the low brake noise, the long service life and the low manufacturing cost, and the requirement for the yaw low-speed braking of the wind driven generator can be sufficiently met.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and relates to a yaw brake pad material for a wind power generator and a preparation method thereof. Background technique [0002] With the rapid development of the global economy and the continuous improvement of human living standards, human demand for energy is increasing. Due to the depletion of non-renewable resources such as oil, coal, and natural gas, and the increasingly prominent environmental problems caused by their use, increasing the development and utilization of new energy has become a top priority. For decades, renewable clean energy sources such as wind energy, solar energy, tidal energy, biomass energy and water energy have been developed and utilized. Wind energy is recognized worldwide as the best choice among all renewable energy sources except water energy. It is estimated that the theoretical value of wind energy reserves on the earth is about 2.74×10 9 MW...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D69/02C09K3/14
CPCF16D69/025C09K3/14F16D2200/0034F16D2200/0052F16D2200/0086
Inventor 王廷梅陈守兵谢海王齐华
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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