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Method for lowering friction coefficient through surface filming performed in friction shear induced chemical reaction mode

A technology of friction coefficient and chemical reaction, applied in the direction of engine lubrication, engine components, mechanical equipment, etc., can solve the problems of reduced machine life, insufficient lubrication of friction pairs, slow development and application, etc., to reduce lubrication costs and prolong friction pairs The effect of life and lowering the chemical reaction temperature

Active Publication Date: 2017-08-29
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the harsh working conditions such as low load and continuous work in the micro-mechanical industry, the friction pair is prone to failure due to insufficient lubrication, which significantly reduces the life of the machine. Therefore, how to improve lubrication and reduce the friction coefficient of the micro-mechanical friction pair is crucial for extending The service life of mechanical equipment has important practical application value
[0003] Lubrication can be significantly improved and the coefficient of friction can be reduced by adding lubricant to the friction surface, but the synthesis conditions of many lubricants are harsh, requiring extreme conditions such as high temperature and high pressure, which significantly increases the cost of lubricant production and use
In addition to direct heating to initiate chemical reactions, chemical reactions can also be induced by providing energy to the system through mechanical methods. However, due to the lack of in-depth understanding of the mechanism, its development and application have been relatively slow.

Method used

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  • Method for lowering friction coefficient through surface filming performed in friction shear induced chemical reaction mode
  • Method for lowering friction coefficient through surface filming performed in friction shear induced chemical reaction mode

Examples

Experimental program
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Effect test

Embodiment 1

[0015] in 1×10 -10 Under Torr high vacuum environment, add dialkyl disulfide (CH 3 -S-S-CH 3 ) to 1×10 -7 Keep it for 15 minutes after Torr, then start the friction pair at room temperature 25°C, friction speed 2×10 -3 Under the conditions of m / s, load 0.8N, and stroke 1cm, reciprocating friction was carried out 50 times, and the friction coefficient of the system was reduced from 0.52 in the initial stage to 0.18. The test of the friction surface by X-ray photoelectron spectroscopy shows that ferrous sulfide was formed on the surface metal sulfide lubricating film. The friction pair mentioned here is that the upper sample is a tungsten carbide ball; the lower sample is an iron-based metal disc with a surface roughness of R a is 0.06 μm.

Embodiment 2

[0017] in 1×10 -10 Under Torr high vacuum environment, add dialkyl disulfide (CH 3 -S-S-CH 2 CH 3 ) to 2×10 -5 Keep it for 10 minutes after Torr, then start the friction pair at room temperature 25°C, friction speed 2×10 -3 Under the conditions of m / s, load 1N, and stroke 1cm, the reciprocating friction is performed 80 times, and the friction coefficient of the system is reduced from 0.55 in the initial stage to 0.16. The test of the friction surface by X-ray photoelectron spectroscopy shows that copper sulfide metal is formed on the surface. Sulfide lubricating film. The friction pair mentioned here is that the upper sample is a tungsten carbide ball; the lower sample is a copper-based metal disc with a surface roughness of R a 0.1 μm.

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Abstract

The invention discloses a method for lowering the friction coefficient through surface filming performed in a friction shear induced chemical reaction mode. Specifically, the method comprises the steps that in an ultrahigh vacuum environment, dialkyl disulfide is guided into a system, adheres to the surface of metal, and chemically reacts with the surface of the metal to form film through corresponding friction, and the friction coefficient is lowered. The method provided by the invention has good application and popularization prospects in lowing temperatures of certain chemical reactions, lowering the friction coefficient of the system and prolonging the service life of a friction pair.

Description

1. Technical field [0001] The invention relates to the field of mechanical tribology, in particular to a method for reducing the coefficient of friction by forming a film on the surface through a frictional shear-induced chemical reaction. 2. Background technology [0002] Due to the harsh working conditions such as low load and continuous work in the micro-mechanical industry, the friction pair is prone to failure due to insufficient lubrication, which significantly reduces the life of the machine. Therefore, how to improve lubrication and reduce the friction coefficient of the micro-mechanical friction pair is crucial for extending The service life of mechanical equipment has important practical application value. [0003] Adding lubricant to the friction surface can significantly improve lubrication and reduce the coefficient of friction. However, the synthesis conditions of many lubricants are harsh, requiring extreme conditions such as high temperature and high pressure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16N15/00
CPCF16N15/00F16N2200/06
Inventor 徐玉福彭玉斌泰索·威尔福瑞德亚当斯·希瑟胡献国
Owner HEFEI UNIV OF TECH
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