Polyimide composite material for bearing retainer, preparation method of polyimide composite material and bearing retainer

Abstract

The invention belongs to the technical field of bearing materials, and particularly relates to a polyimide composite material for a bearing retainer, a preparation method of the polyimide composite material and the bearing retainer. The polyimide composite material for the bearing retainer is prepared from the following raw materials, by mass: 60-80% of ether anhydride type polyimide, 20-40% of polytetrafluoroethylene and 0-5% of molybdenum disulfide. The ether anhydride type polyimide is monoether anhydride polyimide and/or diether anhydride polyimide. The polyimide composite material provided by the invention belongs to a plastic alloy system, has good compatibility among components, has no wear effect of inorganic fibers and the like, has the comprehensive advantages of high mechanicalstrength, wear resistance, self-lubrication, high and low temperature resistance and the like, and is suitable for being used as a self-lubricating retainer of an ultralow-temperature high-speed bearing.

Description

technical field [0001] The invention belongs to the technical field of bearing materials, and in particular relates to a polyimide composite material for a bearing cage, a preparation method thereof, and a bearing cage. Background technique [0002] Bearings used in rocket engines work in ultra-low temperature fluid media such as liquid hydrogen and liquid oxygen, and need to be matched with bearing cages with excellent performance at low temperature and high speed. Traditionally, ultra-low temperature, high-speed heavy-duty bearing cages mainly use PTFE02 glass fiber modified polytetrafluoroethylene composite cage material, the Chinese invention patent with the authorized announcement number CN101186117B discloses a polytetrafluoroethylene bearing cage reinforced with glass cloth, which can be used for low temperature and high speed bearings, but its use The lower temperature limit is -196°C, and the bearing dn value is 1.2 million mm rpm. With the further improvement of...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a polyimide composite material for a bearing cage, which has high low-temperature strength, wear resistance and self-lubricating properties, so as to solve the problem that the cage prepared by the current bearing cage material cannot be used Problems with low temperature and high speed bearings

[0004] The second object of the present invention is to provide a method for preparing polyimide composite materials for bearing cages, so as to solve the problem that the cage materials obtained by the existing preparation methods cannot be used for low temperature and high speed bearings

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