Method for prolonging service life of solid lubricating bearing assembly
A technology for solid lubricated bearings and bearing assemblies, which is applied to the rigid brackets, bearing components, bearings and other directions of bearing components, and can solve the problems of short life of solid lubricated bearing assemblies.
Inactive Publication Date: 2017-11-10
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, provide a method for improving the service life of solid lubricating bearing assemblies, and solve the problem that the service life of solid lubricating bearing assemblies is relatively short in aerospace applications
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[0017] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the scope of protection of the present invention is not limited to the following the described embodiment.
[0018] According to the solid lubricating bearing assembly of the present invention, the accelerated life test is carried out. The bearing is an angular contact ball bearing, the bearing model is 71916, and the precision grade is P4.
[0019] 1) The bearing inner ring 10, the bearing outer ring 11, and the bearing steel ball 5 are all sputtered with molybdenum disulfide (MoS 2 ) based self-lubricating solid film;
[0020] 2) The bearing preload is 100N;
[0021] 3) The material of shaft 1 and bearing seat 4 is consistent with the bearing inner ring 10, bearin...
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The invention discloses a method for prolonging the service life of a solid lubricating bearing assembly. The method is utilized in design of long-service life solid lubricating bearing assemblies. The method is characterized by comprising the steps that 1) a bearing inner ring, a bearing outer ring and bearing steel balls are plated with molybdenum disulfide (MoS2) based self-lubricating solid films through sputtering; 2) pretightening force of the bearing is as small as possible under the precondition that axis rigidity is guaranteed; 3) a shaft, a bearing seat, the bearing inner ring, the bearing outer ring and the bearing steel balls are manufactured through the same material, and the difference of coefficients of linear expansion is smaller than (1 * 10<-7>) / K; 4) the bearing inner ring and the shaft are in small interference fit; 5) the bearing outer ring and the bearing seat are in small clearance fit; and 6) an inner side seal ring and an outer side seal ring are separately mounted on the two sides of a solid lubricating bearing. According to the method, the long service life problem of the solid lubricating bearing assembly is solved, the actual service life measurement time exceeds 62 million, and the method has relatively high reliability.
Description
technical field [0001] The invention relates to a method for increasing the service life of a solid lubricating bearing assembly, in particular to a method for increasing the service life of a solid lubricating bearing assembly used in an aerospace environment. Background technique [0002] MoS 2 Based on self-lubricating solid film, it has been widely used in aerospace motion mechanisms due to its advantages of no pollution, wide temperature range, high load capacity, and radiation resistance. The service life of existing solid lubricating bearing components is generally less than 10 million times. It has operated more than 10 million times, and the solid lubrication is prone to failure, which cannot meet the existing aerospace requirements. Contents of the invention [0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, provide a method for improving the service life of solid lubricating bearing components, and so...
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IPC IPC(8): F16C35/06
CPCF16C35/061F16C2202/54F16C2326/47
Inventor 邓容袁海涛胡亭亮孙小进孙胜利陈凡胜
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI