In the many factors affecting the reliability of space payloads, moving parts in the equipment long life reliability problems, is the key to its difficulty and. Moving parts including bearings, gears, cams and other mechanical parts and motor for all types of drive and control. Due to the particularities of the space environment, the electrical and the mechanical parts after undergoing a process of ground testing, transport, launch, work correctly and reliably in space is the key instrument, such as long life performance. Statistics show that sports bodies arising from the poor lubrication "stuck" is the main cause satellite failures, one of the bearings and gear wear issue, is the key to affect equipment life.
Bearings are a very important space payloads moving parts, instrument rotation of the load (such as continuous rotation, swinging), required shaft support. The bearings used in space payload consists mainly of rolling bearing, sliding bearing. Plain bearings for less precision high occasions only; scroll bearing the bearing inner ring, outer ring, cage, ball and other components, when used in addition to be able to withstand radial and axial loads from, but also has enough life and running accuracy in order to meet the space requirements of the instrument.

 


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