基于多目标遗传算法的斜盘式轴向柱塞泵低脉动结构优化设计OA北大核心CSTPCD

Because of the asymmetric structure of axial piston pump,its output pressure and output flow have pulsating characteristics,which affects the output stability and reliability of hydraulic system.Therefore,an optimization design method of low pulsation structure of swashplate axial piston pump based on multi-objective genetic algorithm is proposed.Firstly,the CFD(computational fluid dynamics)simulation analysis method was used to analyze the generation mechanism of pressure-flow pulsation at the upper/lower dead points of the axial piston pump;secondly,the influence of damping groove structural parameters on the output pressure-flow pulsation of axial piston pump was analyzed,and a multi-objective optimization model of damping groove structure was constructed;finally,the structure of the low pulsation damping groove was solved.The optimized structural parameters were as follows:the damping groove radius was 2.21 mm,the damping groove length was 10.32 mm,and the damping groove deflection angle was 16.54°.After optimization,the pressure pulsation rate was 0.59%,which was reduced by 0.16%compared to the pre-optimization value of 0.75%,and the pulsation amplitude was 0.25 MPa.The flow pulsation rate was 12.02%,which was reduced by 43.59%compared to the pre-optimization rate of 55.61%.The research results provide effective theoretical support and practical guidance for the optimal design of low pulsation structure of axial piston pump.