The commonly used self-lubricating bearings are especially suitable for some parts of the main engine that do not allow adding lubricants or are not frequently replaced due to their low friction coefficient, low wear degree, long service life, no need for external lubricants, and no maintenance. However, due to the complex working environment, large load, insufficient self-lubrication, and other reasons, it is easy to cause excessive wear of the bearing.
The life of the bearing is not only related to the lubricating material itself but also affected by many external factors:
such as speed, temperature, load, swing amplitude, swing frequency, etc. The better the wear resistance of the material and the lower the coefficient of friction, the longer the life. The temperature coefficient, load coefficient, swing amplitude coefficient, swing frequency coefficient, and sliding coefficient are all proportional to the service life, that is, when the temperature increases, the load, swing amplitude, swing frequency, and sliding speed increase, it will aggravate the wear of the bearing and cause its wear and tear. Lifespan is reduced. Today, with the vigorous development of space technology, people are not only satisfied with the environmental field of the earth, but also extend the research field to outer space. In addition to conventional influencing factors, ultra-high vacuum, irradiation, atomic oxygen, cosmic dust, microgravity, etc. are also necessary considerations.