Friction material for magnetically levitated train and preparation method and application thereof

A technology of magnetic levitation trains and friction materials, applied in friction linings, mechanical equipment, transportation and packaging, etc., can solve the problems of large wear, short service life, poor friction coefficient stability, etc., achieve small wear, improve service life, and stable good sex effect

Inactive Publication Date: 2019-01-04
BEIJING TIANYISHANGJIA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved in the present invention is to overcome the poor stability of the friction coefficient of the friction material used in the magnetic levitation train in the prior art, and the technical defect that the wear is too large to cause its service life to be short, thereby providing a friction material for the magnetic levitation train and Its preparation method and application

Method used

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  • Friction material for magnetically levitated train and preparation method and application thereof
  • Friction material for magnetically levitated train and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The raw material composition of the friction material is as follows: copper powder 65g, chromium powder 8g, graphite 12g, silicon dioxide 2g, molybdenum disulfide 2g, tin powder 3g, potassium feldspar 8g;

[0029] Add the above-mentioned raw materials into a V-type mixer for mixing, and add 5 g of alcohol with a volume fraction of 10% at the same time, mix the materials for 2 hours, then add them to a hydraulic press for compression molding, the compression pressure is 5 MPa, and the compression time is 5 seconds. After the compression molding, add bell The sintering is carried out in a bell furnace with hydrogen as the protective gas in the bell furnace, the sintering temperature is 860°C, and the sintering time is 3h, and the friction material is made.

Embodiment 2

[0031] The raw material composition of the friction material is as follows: copper powder 55g, chromium powder 10g, graphite 6g, silicon dioxide 4g, molybdenum disulfide 5g, tin powder 1g, potassium feldspar 5g;

[0032] Add the above raw materials into a V-type mixer for mixing, and at the same time add 3.44g of alcohol with a volume fraction of 5%, mix for 2h, then add to a hydraulic press for compression molding, the compression pressure is 6MPa, the compression time is 8s, after compression molding Put it into a bell furnace for sintering. In the bell furnace, hydrogen is used as a protective gas. The sintering temperature is 850°C and the sintering time is 2h to make a friction material.

Embodiment 3

[0034] The raw material composition of the friction material is as follows: copper powder 60g, chromium powder 5g, graphite 15g, silicon dioxide 5g, molybdenum disulfide 1g, tin powder 5g, potassium feldspar 9g;

[0035] Add the above raw materials into a V-type mixer for mixing, and at the same time add 3g of alcohol with a volume fraction of 5%, mix for 2 hours, and then add it to a hydraulic press for compression molding. The compression pressure is 7MPa, and the compression time is 6s. After compression molding, add The sintering is carried out in a bell furnace, where hydrogen is used as a protective gas, the sintering temperature is 900°C, and the sintering time is 2.5h, and the friction material is made.

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Abstract

The invention provides a friction material for a magnetically levitated train and a preparation method and application thereof. The friction material for the magnetically levitated train is prepared from the following raw materials in parts by weight: 55-65 parts of copper powder, 1-5 parts of molybdenum disulfide, 1-5 parts of tin powder, 11-25 parts of a frictional component and 6-15 parts of alubricating component. By adding the frictional component and the lubricating component into the raw materials, the raw materials are reasonably proportioned, so that the friction material has very high friction coefficient and wear resistance, the stability of the friction coefficient is good, and the thermal decay in a high-temperature condition is reduced; meanwhile, the hardness of the friction material is low, and wear between the friction material and a brake disc or a magnetically levitated track can be reduced, so that the service lives of the friction material, the brake disc and themagnetically levitated track are prolonged. Furthermore, the stability of the friction coefficient of the friction material is good and wear is small. The magnetically levitated train adopting the friction material is safer to operate, can be used under circumstances of extreme climates such as severe cold or rainy and snowy climates, and is extremely high in applicability.

Description

technical field [0001] The invention relates to the technical field of maglev trains, in particular to a friction material for maglev trains and a preparation method and application thereof. Background technique [0002] Maglev train technology is a modern high-tech rail transit technology. It uses electromagnetic force to achieve non-contact suspension and guidance between the train and the track, and then uses the electromagnetic force generated by the linear motor to drive the train. Compared with traditional wheel-rail trains, maglev trains have the advantages of good riding comfort, safety, high speed, high efficiency, and no noise pollution. They have become a research hotspot in the field of high-speed transportation in developed countries in the world, and have developed into a new high-speed transportation system. , is also a development direction of the future high-speed railway. [0003] The braking of the maglev train is an indispensable process during the opera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10B22F1/00C22C1/05C22C9/00F16D69/02
CPCF16D69/02F16D69/027C22C1/05C22C9/00F16D2200/0026F16D2200/0082B22F1/105
Inventor 吴佩芳释加才让赵尚节曹静武龙波
Owner BEIJING TIANYISHANGJIA NEW MATERIAL
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