Copper-base powder metallurgical brake pad material for sea-base wind turbine generator system and preparation process thereof

A wind turbine, powder metallurgy technology, applied in mechanical equipment, friction linings, etc., can solve the problems of poor reliability and poor corrosion resistance, and achieve the effects of full response, good friction coefficient stability, and good corrosion resistance.

Inactive Publication Date: 2011-04-06
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the powder metallurgy brake pads used in the braking of sea-based high-power wind turbines have technical defects such as poor corrosion resistance and poor reliability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: Brake pads for high-speed shafts of 5MW sea-based high-power wind turbines

[0034] Brake pad material components are: 15% copper, 40% FWCuZn30 brass, 14% graphite, 14% sea sand, 7% silicon carbide, 8% ferrochrome, 2% tin.

[0035] The particle size of brake pad material components is as follows: the particle size of copper is 55-75um, the particle size of FWCuZn30 brass is 55-75um, the particle size of graphite is 200-300um, the particle size of sea sand is 200-300um, and the particle size of silicon carbide is The particle size is 100-150um, the particle size of ferrochrome is 55-75um, and the particle size of tin is 55-75um.

[0036] The manufacturing process is as follows: each component is mixed evenly according to the proportion, then mixed with 0.5% aviation kerosene and 0.8% zinc stearate accounting for the total weight of each component, and mixed evenly with a three-dimensional mixer; the mixture is formed with a pressing pressure of 350MPa Powder ...

Embodiment 2

[0040] Brake pads for high-speed shafts of 3.5MW sea-based high-power wind turbines

[0041] Brake pad material components are: 18% copper, 39% FWCuZn30 brass, 12% graphite, 12% sea sand, 8% silicon carbide, 9% ferrochrome, 2% tin.

[0042] The particle size of brake pad material components is as follows: the particle size of copper is 25-55um, the particle size of FWCuZn30 brass is 25-55um, the particle size of graphite is 50-150um, the particle size of sea sand is 50-150um, and the particle size of silicon carbide is The particle size is 25-100um, the particle size of ferrochrome is 25-55um, and the particle size of tin is 25-55um.

[0043] The manufacturing process is as follows:

[0044] After mixing the components uniformly according to the proportion, add 1% aviation kerosene and 0.2% zinc stearate accounting for the total weight of each component, and use a three-dimensional mixer to mix uniformly; the mixture is formed into a powder compact with a pressing pressure of...

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Abstract

The invention provides a copper-base powder metallurgical brake pad material for a sea-base wind turbine generator system, which comprises the following components in percentage by weight: copper, FWCuZn30 brass, graphite, sea sand, silicon carbide, ferrochrome and tin. The preparation process of the brake pad material comprises the following five steps: blending materials, pressing blank, making support steel backing, pressurizing and sintering in sections, and machining for molding. In the invention, by adopting the seawater corrosion resistant brass as a material matrix and high-content nonmetal components the weight ratio of which is more than 30%, excellent corrosion resistance, high friction coefficient and high brake moment can be obtained, and the stability of friction coefficient is good; the obtained powder metallurgical brake pad material conforms to the service performance requirements for a high-speed shaft braking device of the sea-base high-power wind turbine generator system; the material has the advantages of rational component proportion, simple machining process, good corrosion resistance, high friction coefficient, good friction coefficient stability and high strength, and is suitable for industrialized production; and the copper-base powder metallurgical brake pad material can be taken as a high-speed shaft braking material for the sea-base high-power wind turbine generator system with the power of more than 3.5MW.

Description

Technical field: [0001] The invention relates to a brake pad material and a preparation process for a wind turbine, in particular to a copper-based powder metallurgy brake pad material and a preparation process for a sea-based wind turbine, and belongs to the technical field of metallurgical material preparation. Background technique: [0002] Wind energy, known as "white coal in the blue sky", is one of the world's attention-grabbing renewable energy sources. Land-based wind turbines are currently being used in all possible wind farms in China. However, since land-based wind power is far away from the developed coastal areas where my country’s electricity is mainly used, it is not conducive to wind power grid connection. Therefore, according to relevant surveys, the current land-based wind turbines The utilization rate of power generation is less than 30%. Sea-based wind power has the advantages of strong wind power, long utilization time, and proximity to developed cities ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C1/04F16D69/02
Inventor 姚萍屏樊坤阳佘直昌
Owner CENT SOUTH UNIV
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