Numerical simulation of an inner engaging gerotor based on the optimization of inlet and outlet cavities

摘要

Based on the available theoretical and half empirical methods of gerotor pump design, the optimization of inlet and outlet cavities for an inner engaging ellipse gerotor has been presented. The interior flow inside of the optimized cavities and pump has been observed by using software Pumplinx, and the results show that the optimized inlet and outlet cavities have a higher volumetric efficiency. Then, the numerical investigation of the gerotor has been carried out with the commercial software Pumplinx. The simulation results show a good agreement with the theoretical data, the correctness of the simulation results was verified. The pressure is uniform in most area of the inlet and outlet cavity and cavitation phenomenon has not been detected. It provides guide for the oil pump design.