Modeling efficiency characteristics of piston pump by considering constant energy loss factor
TIAN Qingqing1,GU Lichen2*
1. School of Mechanical Engineering, Xi′an Aeronautical University, Xi′an, Shaanxi 710077, China; 2.School of Mechanical and Electrical Engineering, Xi′an University of Architecture and Technology, Xi′an, Shaanxi 710043, China
Abstract：Aiming at the problem that the existing efficiency characteristic model of axial piston pump is difficult to guarantee the prediction accuracy under the full working condition. The constant energy loss factor was used to optimize the total efficiency calculation model of axial piston pump was proposed. Firstly, the energy loss composition of axial piston pump is studied based on energy conservation principle. The reasons for the error of total efficiency calculation model of the axial piston pump are analyzed. Secondly, the efficiency characteristic model of axial piston pump under full working conditions is established and its effectiveness is verified. Finally, the efficiency characteristics of the axial piston pump variable displacement are simulated and verified by experiment. The results show that the efficiency characteristic model can accurately predict the total efficiency of axial piston pump, which is established by considering the steady energy loss factor under the conditions of variable speed, pressure and displacement. Moreover, the maximum relative error of the efficiency prediction model is less than 4.8% under the full working condition. The total efficiency model of the piston pump considering the steady energy loss factor can accurately predict its efficiency in the full range of working conditions, which provides the basis for energy-saving optimization design and control of piston pump.
