Mixture lubricated rolling bearing and manufacturing method thereof

Abstract

The invention provides a manufacturing method of a rolling bearing which takes mixture of polyethylene oil and solid lubricating material as lubricant and the rolling bearing. The manufacturing method comprises the steps of injecting the lubricant which comprises mixture of polyethylene oil and solid lubricating material micropowder into cavity of the bearing and stamping a dust cap, thus a high temperature resistant sealed bearing is obtained. When the bearing operates at the temperature of being lower than oxidation chain scission temperature of the polyethylene oil, fluid film lubrication is formed; and when the bearing operates at the temperature of being higher than the oxidation chain scission temperature of the polyethylene oil, the polyethylene oil volatilizes, and the fluid film lubrication is changed into solid film lubrication. Compared with the prior art, the invention has the advantages that the problems that perfluoropolyether high temperature lubrication oil has high price and carbon is deposited at high temperature are solved, the problem that solid lubricant is required to be adopted from the start is solved, the bearing can actively realize conversion from fluid lubrication to solid lubrication according to running temperature, respective maximum advantages of the fluid lubrication and the solid lubrication are fully played, operational reliability of the bearing is improved and life of the bearing is prolonged, and the bearing is applicable to various high temperature environments.

Description

technical field [0001] The invention relates to the technical field of special rolling bearings, in particular to a manufacturing method of a rolling bearing using a mixture of polyether oil and solid lubricating material as a lubricant and the rolling bearing. Background technique [0002] For rolling bearings working in high temperature environment, the choice of lubricant is directly related to the reliability and service life of the bearing at high temperature, so it is very important. At present, two lubrication methods, fluid film lubrication and solid film lubrication, are mainly used. The following will explain respectively and point out their limitations and deficiencies: [0003] 1. Fluid film lubrication: choose perfluoropolyether (also known as perfluoroalkyl polyether, PFPE or PFAE) as the base oil of high-temperature grease, which is generally thickened by polytetrafluoroethylene (PTFE) into grease. Perfluoropolyether has strong chemical inertness and temperat...

AI Technical Summary

Problems solved by technology

[0007] The first object of the present invention is to provide a method for making a mixture-lubricated rolling bearing, so as to solve the problem of high-temperature bearings using perfluoropolyether grease and fluid lubrication in the prior art. Satisfying the problem of lifetime lubrication and high-temperature bearings using solid lubricating materials, when performing solid lubrication, the introduction of the existing solid lubricating materials into the bearing cavity is troublesome and may interfere with the normal movement of the rolling elements and the technical problems of the maximum operating speed of the bearing being limited

[0008] The second object of the present invention is to provide a mixture-lubricated rolling bearing to solve the problem that in the prior art, high-temperature bearings use perfluoropolyether grease, and when fluid lubrication is used, the cost of lubricants is too high and it is difficult to meet the requirements of lifetime lubrication. Problems and high-temperature bearings use solid lubricating materials. When performing solid lubrication, the introduction of solid lubricating materials into the bearing cavity is troublesome and may interfere with the normal movement of the rolling elements and the technical problems that the maximum operating speed of the bearing is limited.

Images