Abstract
Abstract: The oil viscosity affects the pump filling coefficient, so it is the important parameter affecting lifting performance of metal screw pump. Firstly using the finite volume method to establish a full-metal single screw pump 3D model, secondly using FLUENT software to calculate outlet pressure changes with different series of oil viscosity in condition of the same inlet pressure.Lastly Drawing outlet pressure change curves to evaluate the concrete effect of oil viscosity on the performance of the pump . The results indicate that the oil viscosity affects liquid filling coefficient of pump. As the viscosity increases, the outlet pressure of the pump increases, the leakage of the pump output decreases, thereby lifting capacity and volumetric efficiency of the pump improve.
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