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Polytetrafluoroethylene bonded solid lubricant

A polytetrafluoroethylene based, solid lubricant technology, used in lubricating compositions, additives, petroleum industry and other directions, can solve the problem of long service life, performance can not fully meet the requirements of screw type oil-free air compressor rotor supporting use, use Harsh working conditions and other problems, to achieve long wear life, low friction coefficient, good impact resistance of the coating

Active Publication Date: 2015-12-09
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

The screw oil-free air compressor operates under low-load and high-speed operating conditions, with harsh working conditions and long service life (accumulative working hours require more than 8,000 hours). Supporting use requirements for oil-free air compressor rotors

Method used

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  • Polytetrafluoroethylene bonded solid lubricant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 45.0g of polytetrafluoroethylene, 15.0g of melamine cyanurate (MCA), 10.0g of molybdenum disulfide, 9.0g of antimony trioxide, 3.0g of cerium fluoride and 4.0g of carbon black and pour them into a ball mill jar, add about 35 grams of organic thinner for grinding. Then add 270.0 grams of polyamide-imide resin, 24.3 grams of epoxy resin and 620 grams of diluent to disperse evenly to form a polytetrafluoroethylene-based bonded solid lubricant [diluent: 40% pyrrolidone, 40% dimethyl formamide , Xylene 20% (volume percentage composition)].

Embodiment 2

[0029] The preparation method is the same as in Example 1, and the mass percentage of the lubricant is composed of: 4.0% polytetrafluoroethylene, 2.0% melamine cyanurate (MCA), 1.2% molybdenum disulfide, 0.5% cerium fluoride, Antimony 1.2%, carbon black 0.4%, polyamideimide 9.0%, epoxy resin 2.0%, diluent balance [diluent (volume percentage composition: pyrrolidone 40%, dimethylformamide 40%, xylene 20%)].

Embodiment 3

[0031] The preparation method is the same as in Example 1, and the mass percentage of the lubricant is composed of: polytetrafluoroethylene 7.0%, melamine cyanurate (MCA) 2.0%, molybdenum disulfide 2.0%, cerium fluoride 0.3%, di Antimony 0.5%, carbon black 0.3%, polyamideimide 8.0%, epoxy resin 2.0%, diluent balance [thinner (volume percentage composition: pyrrolidone 40%, dimethylformamide 40%, xylene 20%)].

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Abstract

The invention discloses a polytetrafluoroethylene bonded solid lubricant. The polytetrafluoroethylene bonded solid lubricant is prepared with polyamide-imide resin and epoxy resin as binders, polytetrafluoroethylene, melamine cyanurate and molybdenum disulfide as solid lubricants and a mixed solvent as a diluent, and contains various fillers and a modification additive. The lubricant is coated on the surfaces of mechanical components and test samples, and is heated and solidified to form polytetrafluoroethylene bonded solid lubrication coating layers. The lubricant solves the problems of lubrication and wearing of motion parts under low load and high speed conditions, such as wearing and lubrication problems between oil-free compressor rotors and between rotors and a shell, and is especially suitable for being used on screw type oil-free air compressors.

Description

technical field [0001] The invention relates to a polytetrafluoroethylene-based bonded solid lubricant. Background technique [0002] Oil-free lubricated air compressor means that it does not need to lubricate the compression space when compressing the medium, so the medium does not contain oil and is not contaminated by oil. Compressors that can achieve this purpose include screw compressors, turbo compressors, membrane compressors, and piston compressors. Among them, the screw air compressor has the characteristics of high efficiency, automatic monitoring operation, high reliability, simple maintenance, low noise and small vibration, and has attracted widespread attention. [0003] The screw compressor is a rotary volumetric compressor. It seals the gas in the cogs formed by a pair of intermeshing female and male rotors in the casing. The volume of the cogs is reduced by the rotation of the rotors to compress the gas. . Since the leakage of gas during the compression pr...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10M161/00C10N50/08C10N30/06
Inventor 冶银平万宏启周惠娣徐海燕
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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