Abstract
This paper presents an investigation of the anti-shock characteristics of water lubricated journal bearing used in the motorized centrifugal air compressor for fuel cell vehicles (FCV). The nonlinear trajectory of the shaft under a half sinusoidal shock load is numerically calculated by simultaneously solving the shaft motion equations and the Reynolds equation. Meanwhile, the pressure-compliance relationship of elastic-plastic roughness contact is also introduced to consider the possible direct contact between the spinning shaft and sleeve during shock. The influences of shock direction, amplitude, time and geometrical parameters on the anti-shock performance of the bearing are analyzed.
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