Method for making blank of retainer of bearing from high molecular composite material

Abstract

The invention relates to a method for making the blank of a retainer of a bearing from a high molecular composite material. The high molecular composite material comprises an aramid pulp fiber, a thermosetting polyimide and polytetrafluoroethylene. The aramid pulp fiber is subjected to reflux cleaning, the cleaned aramid pulp fiber and the thermosetting polyimide are subjected to vacuum drying ina vacuum drying box, the dried thermosetting polyimide is sieved by a 1000 mesh sieve to remove oversize materials, the high molecular composite material is formed by mixing above three processed components by a high speed mixer, the high molecular composite material which is ground is filled into a retainer die, is subjected to pressure preformation and is removed out of the die to obtain a tubular retainer blank, and the tubular retainer blank is sintered in a sintering furnace to form the blank of the retainer of the bearing. The high molecular composite material which has the advantages of excellent thermal stability and chemical corrosion resistance, good thermal conductivity and compression creep resistance, high strength, excellent friction and wear resistance, small density and light mass is in favor of the reduction of the self weight of the retainer and the improvement of the high speed running stability of the bearing.

Description

technical field [0001] The invention belongs to the technical field of composite polymer materials, and in particular relates to a method for making a bearing cage blank from a composite polymer material, the composite polymer material comprising aramid pulp fiber, thermosetting polyimide and polytetrafluoroethylene . Background technique [0002] Composite polymer materials are more commonly used to make bearing cages. There are many types of composite polymer materials, such as glass fiber ground powder modified polytetrafluoroethylene materials, etc. [0003] The glass fiber ground powder modified PTFE material is made of glass fiber and molybdenum disulfide modified PTFE material. The material is pretreated by drying the glass fiber at 120°C to remove moisture, and then through the mixing process and filler process, pressurized preforming, and sintering process to finally form glass fiber ground powder modified PTFE material. The cage made of glass fiber ground powder...

AI Technical Summary

Problems solved by technology

For the dn value greater than 2 million, high speed (60000rpm), ultra-low temperature (-253 ℃) and heavy load bearing conditions, the cage made of glass fiber modified PTFE material exhibits large noise and low friction torque. , the amount of friction and the large deformation of the cage size, the abrasive effect of glass fiber particles on the metal friction surface leads to low service life of the bearing, and it cannot reach the service life specified by the main engine

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