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Solid lubrication bearing accelerated life test load spectrum design method

A technology of solid lubricated bearings and accelerated life testing, which is applied in the direction of mechanical bearing testing to achieve the effect of accelerating the failure process and speeding up

Inactive Publication Date: 2016-12-21
BEIHANG UNIV
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Problems solved by technology

In view of the closed policy adopted by foreign countries on my country's related technologies, we have no way of knowing how to design the accelerated life test load spectrum of foreign aerospace solid lubricated bearings. The research on accelerated life tests of solid lubricated bearings in my country has just started. Load Spectrum Design Method for Accelerated Life Test of Solid Lubricated Bearings for Engineering Applications

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  • Solid lubrication bearing accelerated life test load spectrum design method
  • Solid lubrication bearing accelerated life test load spectrum design method
  • Solid lubrication bearing accelerated life test load spectrum design method

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[0074] Adopt the method of the present invention to the accelerated life test load spectrum design of certain space-borne solid lubricated bearing as follows:

[0075] Firstly, analyze the working environment and the stress of the solid lubricated bearing, and select the acceleration stress. Solid lubricating bearings are a basic spaceborne transmission component, widely used in various instruments and mechanisms of space vehicles. The environmental stresses suffered by solid lubricated bearings mainly include temperature, radiation, etc., and the main working stresses include rotational speed, radial load, axial load, etc.

[0076] In actual work, the failure of solid lubricated bearings is mostly caused by poor lubrication or wear. The solid lubricating film is gradually worn out, and the lubricating film is destroyed, resulting in increased bearing torque or vibration, which eventually leads to failure. In the accelerated life test of solid lubricated bearings, the rotati...

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Abstract

The invention relates to a solid lubrication bearing accelerated life test load spectrum design method which is characterized by comprising the following steps: 1) an on-rail working section of a solid lubrication bearing is obtained; 2) an obtained load spectrum block is converted into a typical load spectrum block; 3) the load spectrum block is subjected to grading processing operation according to a solid lubrication bearing fault mechanism and a dynamic wearing rule. When a solid lubrication bearing failure mechanism remains unchanged, an aim of realizing good acceleration effects in a solid lubrication bearing accelerated life test can be attained.

Description

technical field [0001] The invention belongs to the field of reliability of key components of an aerospace on-board transmission mechanism, and in particular relates to a method for obtaining a load spectrum of a solid lubricating bearing accelerated life test. Background technique [0002] According to the statistics of foreign satellites, the "stuck" of the on-board transmission mechanism due to poor lubrication is one of the main reasons for the failure of the satellite, and the friction and wear of the on-board transmission mechanism is an important reason for its performance degradation. Solid lubricated bearings are key components of spaceborne transmission mechanisms. Performance degradation and loss of precision caused by long-term operation are the key factors affecting the life of satellites in orbit. Therefore, their high reliability and long life are of great importance to the development and use of my country's spacecraft. important. Usually the life characteris...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/04
CPCG01M13/04
Inventor 张超王少萍马仲海
Owner BEIHANG UNIV
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