电比例斜轴式柱塞泵特性仿真分析及试验  

Simulation Analysis and Experiment of Electric Proportional Bent-axis Piston Pump

作　　者：文晨阳 李毅波[1,2] 潘晴 王照卓[2] WEN Chen-yang;LI Yi-bo;PAN Qing;WANG Zhao-zhuo(College of Mechanical and Electrical Engineering, Central South University, Changsha, Hunan 410083;College of Light Alloy Research Institute, Central South University, Changsha, Hunan 410083;State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou, Zhejiang 310027)

机构地区：[1]中南大学机电工程学院,湖南长沙410083 [2]中南大学轻合金研究院,湖南长沙410083 [3]浙江大学流体动力与机电系统国家重点实验室,浙江杭州310027

出　　处：《液压与气动》2022年第2期82-93,共12页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(51805551);湖南省自然科学基金(2019JJ50799);流体动力与机电系统国家重点实验室开放基金(GZKF-201924)。

摘　　要：电比例斜轴式柱塞泵为工程机械液压系统的典型液压元件,建立其准确的数字化仿真模型对于液压泵性能预测与结构优化具有重要意义。在分析阀控缸变量机构的变量原理和先导控制阀的结构特性的基础上,建立了某型电比例斜轴式柱塞泵的数学模型。通过对电比例斜轴式柱塞泵进行机械结构参数测绘,获得了柱塞泵的基本结构参数,利用AMESim软件平台建立了电比例斜轴式柱塞泵的数字化仿真模型,揭示了柱塞泵变量机构中反馈弹簧刚度、复位弹簧刚度等结构参数对柱塞泵工作性能的影响规律。为了验证模型的准确性,通过对转速、负载压力以及控制电流等工况参数组合匹配,对柱塞泵的稳态与瞬态性能进行仿真测试与试验验证,对比结果表明,电流-流量曲线的最大误差为6.67%,压力-流量曲线的最大误差为4.44%,仿真模型的瞬态响应时间历程曲线与实测曲线吻合,验证了此次搭建的电比例斜轴式柱塞泵数字化仿真模型的准确性。Electric proportional bent-axis piston pump as a typical hydraulic component of construction machinery,the establishment of its accurate simulation model is significant for the performance prediction and structural optimization.Based on the analysis of the principle of the valve-controlled cylinder variable mechanism and the structural characteristics of the pilot control valve,mathematical model of a certain type of electric proportional bent-axis piston pump is established.The basic structural parameters of the piston pump are obtained by surveying and mapping,and the AMESim simulation model of the electric proportional bent-axis piston pump is established to reveal the influence of structural parameters,such as feedback spring stiffness and return spring stiffness on the performance of the pump.In order to verify the accuracy of the model,the steady-state and transient performance of the pump are simulated and verified.The comparison results show that the maximum error of the current-flow curve is 6.67%,and the maximum error of the pressure-flow curve is 4.44%.The transient response curve of the simulation is consistent with the measured curve,which verifies the accuracy of the digital simulation model of the electric proportional bent-axis piston pump.

关 键 词：工程机械 电比例斜轴式柱塞泵 仿真分析 性能测试 

分 类 号：TH137[机械工程—机械制造及自动化]