Abstract:The change law of the output flow of cam rotor pump is influenced by the electromechanical hydraulic conditions and the fluid physical parameters, but it is not completely clear. Based on the three-dimensional modeling of the cam rotor pump, the change range of four influencing factors, ie. the pump radial clearance, the motor speed, the fluid concentration and the pump inlet and outlet pressure difference, were given, and the computational fluid dynamics model was used for parametric research to analyze the change law under the influence of the single factor and the multiple factors in this paper. The results show that: by the influence of the pump radial clearance (0.16—0.24 mm), the motor speed (200—600 r/min), the fluid concentration (50%—100%), and the pump inlet and outlet pressure difference (0.2—0.6 MPa), the output flow of the cam rotor pump can be increased or decreased respectively, and there is a mutual promotion or inhibition relationship among them;under the action of the multi factor variables, the change law of the pump output flow is more and more complex and diverse.