Design And Simulation Research On Differential Velocity Vane Pump Driven By Non-circular Gears

The pump is a kind of fluid machinery widely used. Differential velocity vane pump driven by non-circular gears is a type of high performance rotor type positive displacement pumps, which pumps and discharges liquid relied on cyclical rotation of the equally distributed vanes on the two impellers. Compared to the general displacement pump, differential velocity vane pump has a large displacement, low flow pulsation, balanced radial load on the impellers, manufactured easily and many other features. Therefore, the design and research of the differential velocity vane pump driven by non-circular gears has great significance.Combined with the working principle and characteristics of the differential velocity vane pump driven by non-circular gears, a variety of design schemes on its driving system are proposed based on the research situation and development trend at home and abroad of the rotor type positive displacement pumps. Different schemes are comprehensively evaluated and adopted by the optimal linear assignment method to determine the differential velocity four-vane pump driven by non-circular gears as the final one.Driving system and pump body of the differential velocity vane pump driven by non-circular gears are designed. The perimeter, undercut and pressure angle of the non-circular gear pitch curve are checked. Orthogonal install is determined as the final install method after the analysis of the non-circular gear driving system’s motion law. Some improvements are proposed based on the reason of trapped liquid and vanes interference by the pump structure design. The flow and displacement performance indicators of the differential velocity vane pump driven by non-circular gears are analyzed and calculated.According to the motion law of the driving system, the kinematics and dynamics theory model are established. Based on MATLAB software, impeller’s angular displacement, angular velocity and angular acceleration are calculated to verify the correctness of the design of the driving system. Proving the motion law of the impeller and reasonable of its structural design by using ADAMS and ANSYS simulation software based on dynamics model of the rotation, which provides the theory basis for further design of the differential velocity vane pump driven by non-circular gears.