Lubricating process suitable for spaceflight low-speed bearing

Abstract

According to the lubricating technology suitable for the spaceflight low-speed bearing, a novel composite lubricating mode of lubricating oil and lubricating grease is adopted in the lubricating technology method, an early-stage grease filling test is carried out according to the structure and the size of the bearing, and the filling amount of the lubricating grease is obtained through a test result; the filling amount and the mixing ratio of the lubricating oil and the lubricating grease are reasonably distributed, so that the lubricating environment in a raceway of the bearing under the low-rotating-speed working condition is improved, and the effect of prolonging the service life of the bearing is achieved; moreover, a reasonable lubricating grease filling process is formulated, the bearings are screened through a running-in test, the filling amount of the lubricating grease is reasonably distributed according to the areas of inner and outer ring raceways of the bearings, and the filling amount and the filling uniformity of the lubricating grease on the inner and outer raceways of the bearings are ensured through weighing of a precision balance and filling of a special grease filling worker. The grease filling process and running-in screening of the bearing are necessary verifications for ensuring flexible operation and reasonable scheme of the bearing under the condition of adopting the novel composite lubrication mode.

Description

technical field [0001] The invention relates to the technical field of aerospace bearing lubrication, in particular to a lubricating process suitable for aerospace low-speed bearings. Background technique [0002] Bearings are the basic parts in the aerospace field and have a wide range of applications. In recent years, with the continuous extension of the design life of satellites in orbit, from 3 to 5 years to 8 years or even more than 12 years, the life requirements of satellites for the bearings used in various parts of the satellite have also been greatly improved. Working life more than 1×10 9 change. Under the condition of low rotational speed (the rotational speed is only a few hundred or even tens of revolutions) and bearing load, the long-life lubrication technology has become a bottleneck problem restricting the development of long-life satellites. [0003] Due to the particularity of aerospace bearings, only one-time lubrication can be used to ensure their ser...

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Problems solved by technology

[0003] Due to the particularity of aerospace bearings, only one lubrication can be used to ensure its service life, and there are two commonly used lubrication methods: solid lubrication and oil lubrication; research and tests have shown that the number of times the solid lubrication film is rolled reaches 1 ×10 7 After that, it is prone to spot peeling, which greatly reduces its lubricating performance and cannot meet the requirements of long-life lubrication; while oil-lubricated bearings, in the case of low-speed operation, the bearing raceways cannot form a good oil film, and the bearings have been operating under boundary lubrication for many years. As the surface of the bearing raceways gradually wears out, the abrasives will contaminate the lubricating oil and reduce its performance. In addition, volatilization and creeping will also cause the lubricating oil to gradually lose over time; therefore, the above two common lubrication methods cannot meet the low-speed aerospace requirements. Bearing Long Life Requirements

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