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A Load Spectrum Design Method for Accelerated Life Test of Solid Lubricated Bearings

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: 2018-08-21
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

Method used

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  • A Load Spectrum Design Method for Accelerated Life Test of Solid Lubricated Bearings
  • A Load Spectrum Design Method for Accelerated Life Test of Solid Lubricated Bearings
  • A Load Spectrum Design Method for Accelerated Life Test of Solid Lubricated Bearings

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

[0075] First, analyze the working environment and the stress of the solid lubricated bearing, and select the acceleration stress. Solid lubricated bearing is a basic spaceborne transmission component, which is widely used in various instruments and mechanisms of space vehicles. The environmental stress of solid lubricated bearings mainly includes temperature, radiation, etc., and the working stress mainly includes 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 and consumed, and the destruction of the lubricating film leads to an increase in bearing torque or an increase in vibration, which eventually leads to failure. When carrying out the accelerate...

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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, in particular to a method for obtaining a load spectrum of an accelerated life test of a solid lubricated bearing. Background technique [0002] According to foreign satellite statistics, 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. The solid lubricated bearing is a key component of the on-board transmission mechanism. The performance degradation and loss of precision caused by its long-term operation are the key factors affecting the satellite on-orbit life. Therefore, its high reliability and long life are very important to the development and use of my country's spacecraft important. Usually the life characteristics of product...

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Application Information

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