Analysis of hydraulic servo loading system for high-speed bearing in ultra-low temperature environment

In ultra-low temperature environment, the mechanical properties of bearing rotating in high speed change a lot, which has a great influence on the operation of machinery. To test the fatigue properties of air bearing, a hydraulic servo loading system for high-speed bearing in ultra-low temperature is designed and analyzed. According to the requirements of loading environment, this paper first designs a hydraulic servo loading system which could overcome the influence of high frequency disturbance. Then the components are selected with the related parameters in the hydraulic system calculated. Finally the simulation and analysis of the hydraulic system are carried out to verify the feasibility of the design by the AMESim software. All the research results above could provide reference for tests of aerospace high-speed bearing and designs of some other relevant hydraulic systems.