中文摘要：

探讨间隙尺寸对转子泵容积效率与工作可靠性的影响。基于给定的不同径向间隙，利用动网格技术，对非接触式凸轮转子泵的内部流场进行二维非定常数值模拟研究，获得了不同间隙对凸轮转子泵性能的影响规律。结果表明：在相同进出口压差条件下，随着径向间隙的增加，间隙处泄漏量随之增加，转子泵的容积效率出现明显下降；在相同的间隙下，随着压差的增大，转子泵的容积效率随之减小，但随着压差增大，间隙对容积效率的影响增大。其结果可为转子泵的性能预测和优化提供参考。

英文摘要：

This paper discusses the influence of gap size on the volumetric efficiency and operational reliability of rotor pump; conducts numerical simulation study of two-dimensional non-fixed constant in inner flow field of non-contact cam rotor pump by using dynamic mesh technique based on the given different radial clearances and ob- tains the law of influence of different clearances on the performance of cam rotor pump. The result shows that, un- der the same inlet and outlet differential pressure condition, the leakage rate at clearance increases with the increase of radial clearance and the volumetric efficiency of rotor pump significantly decreases. With the .same clearance, the volumetric efficiency of rotor pump decreases with the increase of differential pressure; however, the influence of clearance on volumetric efficiency increases with the increase of differential pressure. The research result can provide reference for performance prediction and optimization of rotor pump.