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Description
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 small-type cryogenic turbo expander. The rotor was suspended under the action of the gas film pressure to rotate frictionlessly at high speed. The bearing loading capacity is one of the static characteristics of small-type turbo expander, experimental research in the study of static characteristics is more important than numerical simulation, a new and accurate type of test system for dynamic measurement of axial thrust bearing loading capacity of small-type turbo expander is presented in this paper. The system can accurately measure the gas film force between the thrust disc and the thrust 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.
