Flow Field Analysis And Characteristics Study Of Cam Rotor Pump Based On CFD

Cam rotor pump is a typical non-contact positive displacement pump,in its operation,by the rotor and pump shell together constitute the cavity volume will occur cyclical changes,which constitute a higher degree of vacuum and discharge pressure.Cam rotor pump with a compact structure,easy maintenance,self-priming ability,wide range of transmission medium viscosity and other characteristics of the widely used in many areas of the national economy.During the operation of the cam rotor pump,the flow of the internal medium is the main reason for the vibration and noise,and the overall mechanical performance of the cam rotor pump.At present,the related literature for the above aspects of the study are mostly limited to the rotor blades for the two blades and three blades of the cam rotor pump,and for the blades more,more complex structure of the cam rotor pump characteristics are less.In this paper,cam rotor pump as the research object.Firstly,the cam rotor pump with different structure is modeled by using the related theoretical knowledge of rotor profile design and Matlab and CAD software.Secondly,the internal flow path of each cam rotor pump is extracted and the necessary pre-treatment is carried out.Finally,the CFD software is used to simulate the internal flow field of the cam rotor pump,and the factors influencing the flow pulsation and volumetric efficiency are discussed from the aspects of cam rotor pump structure and its working condition.In terms of structure,the influence of the helix angle,the number of blades and the size of the rotor on the flow characteristics of the cam rotor pump is studied.In the case of operating conditions,the pressure difference between the inlet and outlet of the cam rotor pump,Pump volumetric efficiency.Some conclusions and achievements can provide a theoretical basis for reducing the pulsation of the cam rotor pump and optimizing the selection of the cam rotor pump in practical application.