Structural Optimization Design And Hydraulic Performance Analysis Of High-pressure Rotary Vane Pump

The sliding vane pump is one of the important equipment for the transportation of refined oil in the petrochemical industry,which can effectively solve the problems in the process of unloading the tank.However,once the rotation speed and working pressure of the conventional sliding vane pump are increased,problems such as efficiency drop,severe vibration and noise will occur,so that the existing vane pumps are limited to the application range of low rotation speed and small flow.Aiming at various problems of ordinary sliding vane pumps,the theory of fluid dynamics is introduced,the hydraulic structure of high-pressure rotary vane pumps is optimized,the fluid domain model of the designed pump is established,and the fluid dynamics of the prototype pump and the designed pump are analyzed by professional pump fluid simulation software.The model performs numerical simulation,compares and analyzes the simulation results of the two pumps,verifies the superiority of the designed pump,and summarizes the transient distribution of hydraulic performance parameters such as the instantaneous flow curve,volumetric efficiency and gas volume fraction of the designed pump under various working conditions..The analysis results show that after the structural optimization design,the volumetric efficiency of the designed pump is increased by 30%,and the volume fraction of cavitation in the pump is greatly reduced to 1.6%.Under different working conditions,the new-type sliding vane pump has relatively even distribution of the gas phase of the fluid,and there is no gas accumulation in the pump.At the same cross-sectional position,with the increase of the rotation speed,the gas volume distribution in the internal flow channel changes periodically.With the increase of the gas volume fraction of the fluid in the pump,the distribution range of the gas volume fraction gradually increases exponentially,the cavitation phenomenon gradually increases,and cavitation is more likely to occur.When the volume fraction of the gas phase of the fluid increases to more than 20%,the transient law of the gas volume distribution in the designed pump changes significantly and it is difficult to judge,which causes great difficulty in the maintenance of the sliding vane pump.The research results provide a theoretical basis for the structural optimization and performance improvement of the same type of sliding vane pump.The new type of sliding vane pump designed through structural optimization has excellent cavitation performance,high efficiency and energy saving,which meets the development requirements of refined oil transfer pumps.It can also promote the efficient production of oil fields.