Dynamic loading capacity test system of thrust gas bearing of cryogenic turbo expander

The gas film between the thrust disc of rotor and the thrust gas bearing in the axial direction is only tens of microns in the high-speed cryogenic turbo expander. The bearing loading capacity is one of the static characteristics, and the experimental research in the study of static characteristics is the same important as numerical simulation, a new and accurate type of test system for dynamic measurement of axial thrust bearing loading capacity of the high-speed cryogenic turbo expander is presented in this paper. The system can accurately measure the gas film force between the thrust disc and the hydrostatic or dynamic thrust gas bearing, study the influence of different structural parameters on the bearing loading capacity, and simultaneously monitor the dynamic relationship between the gas film force and the value of film gap.