The present study aims to solve a system-level problem regarding a journal bearings-gear pump based on a novel simulation model. The developed model consists of different modules: a fluid dynamic model for the pump, a lubrication model for the bearings, a model for the evaluation of shaft motion and a geometrical model. Cavitation models, i.e., the Jakobsson-Floberg-Olsson (JFO)-based model for bearing conformal contacts and the real liquid property model for the pump displacement chamber, are also integrated as submodels to obtain accurate cavitation results of the system. To acquire precise results, the bearing transient lubrication model includes the combined effect of the misalignment and surface roughness. These acquired solutions were based on Reynolds’ theory. The proposed model allows an analysis of the characteristics of the pump-bearing system, including the pump internal flow, bearings lubrication and components’ cavitation, which is applied to calculate the journal bearings-gear pump system used in an aero-engine.

本研究旨在基于新型仿真模型解决有关轴颈轴承-齿轮泵的系统级问题。开发的模型包含不同的模块：泵的流体动力学模型，轴承的润滑模型，轴运动评估模型和几何模型。空化模型（即基于Jakobsson-Floberg-Olsson（JFO）的轴承共形接触模型和泵排量腔的真实液体特性模型）也已集成为子模型，以获得准确的系统空化结果。为了获得精确的结果，轴承瞬态润滑模型包括未对准和表面粗糙度的综合影响。这些获得的解决方案基于雷诺兹的理论。