Preparation method of porous oil-containing lubricating material using uhmwpe as matrix

Abstract

A preparation method of a porous oil-containing lubrication material using UHMWPE as a matrix comprises the steps that 70-90 parts of the UHMWPE, 1-20 parts of polytetrafluoroethylene and 1-10 parts of a solid lubricant are stirred and mixed; then, the mixed powder is subjected to press forming and sintering treatment; the sintered and formed material is subjected to vacuum oiled immersion.The prepared thermoplastic polyethylene porous oil-containing material having ultra-high molecular weight internally has a rich porous structure, can continuously and stably provide lubricating oil in a working state and has abrasion resistance, impact resistance, chemical corrosion resistance, low temperature resistance and other excellent performances.Oil can be continuously supplied to a mechanical friction pair, and a practical effect is good.

Description

technical field [0001] The invention relates to the technical field of lubricating materials, in particular to a preparation method and application of a porous oil-containing lubricating material with thermoplastic UHMWPE as a matrix. Background technique [0002] With the continuous development of society, people's requirements for the quality of social products are getting higher and higher, which also puts forward higher standards for the production of industry and daily necessities. As a result, the industrial revolution was set off, and the industrial revolution also drove the development of equipment. Technology upgrade. The problem of wear and tear of production equipment also follows, and the effect of lubrication determines the service life of equipment. [0003] Friction pairs are widely used in mechanical equipment, and the lubrication effect of friction pairs is an important factor affecting the service life of equipment. Textile machinery, robots, aerospace, p...

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Problems solved by technology

The above two lubrication methods are commonly used, but there are also big problems: first, it is cumbersome to add lubricating grease regularly, and it will increase the maintenance cost of the equipment; second, it is difficult to directly add lubricating grease to some special parts Lubricating grease; third, when the amount of oil is too much, it is easy to absorb dust, or dripping occurs, which affects the service life of the equipment and pollutes the products in production; fourth, during the operation of mechanical equipment, the increase in temperature will reduce the viscosity of lubricating grease, resulting in Lubricating grease leaks, causing pollution to the equipment environment and products in progress; fifth, designing the oil supply system will greatly increase the design difficulty and production cost; sixth, under harsh conditions such as high environmental requirements for mechanical equipment, due to the If the amount of filling is small, it is difficult to achieve the requirement of long life; Seventh, for precision equipment with high requirements on the use environment, the dripping caused by the commonly used lubricating grease during use will reduce the accuracy of the equipment

[0005] Under the above circumstances, the emergence of porous oil-containing self-lubricating materials has solved some of the above-mentioned problems. However, due to the limitation of their own performance, the existing porous oil-containing self-lubricating materials cannot achieve uniformity in the amount of internal micropores and the uniformity of micropores. , the self-lubricating material itself has low strength and poor bonding force with the matrix, which will reduce the strength, toughness and wear resistance of the material

At the same time, the problem that porous oil-containing self-lubricating materials require a large amount of lubricating oil for continuous lubrication of friction parts still cannot be solved

[0006] At the same time, at present, some domestic patents involve a preparation method of a thermoplastic polyimide porous material. Due to the high price of polyimide on the market, it reaches about 1,500 yuan / Kg, which is 50 times that of ultra-high molecular weight polyethylene substrates. Therefore, it is difficult for polyimide porous materials to be promoted and applied in the civilian market.

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