An Approach of Simulating Journal Bearings-Gear Pump System Including Components’ Cavitation

Abstract The present study aims to solve a system-level problem about journal bearings-gear pump based on a novel simulation model. The model developed consists of different modules: a fluid dynamic model for pump, a lubrication model for bearings, a model for the evaluation of shaft motion and a geometrical model. The cavitation models are also integrated as sub-model to obtain accurate cavitation results of system: JFO-based model for bearings conformal contacts and the real liquid property model for pump displacement chamber. In order to acquire precise results, the bearing transient lubrication model includes the combined effect of misalignment and surface roughness. These acquired solution was based on the Reynolds theory. The proposed model allows the analysis of characteristics in pump-bearing system including pump internal flow, bearings lubrication and components’ cavitation, which had been applied in order to calculate the journal bearings-gear pump system used in an aero-engine.