基于AMESim的多路阀结构参数对系统性能的影响研究  

Study on the influence of structure parameters of multi-way valve based on AMESim on system performance

作　　者：高文涛 袁祖强[1] 贾文华[2] 张凯[1] GAO Wentao;YUAN Zuqiang;JIA Wenhua;ZHANG Kai(Institute of Engineering Machinery, Nanjing Tech University, Nanjing 211800,China;College of Mechanical Engineering,Nanjing Institute of Technology,Nanjing 211167,China)

机构地区：[1]南京工业大学工程机械研究所,江苏南京211800 [2]南京工程学院机械工程学院,江苏南京211167

出　　处：《轻工学报》2019年第5期96-102,共7页Journal of Light Industry

基　　金：国家自然科学基金项目(51505211)

摘　　要：为了解决挖掘机工作过程中存在的换向冲击、流量滞环大、阀芯卡滞问题,基于负载敏感比例多路阀的工作原理,在比例减压阀和主阀之间通过增加阻尼孔以匹配主阀和先导阀的速度,并推导出比例减压阀控制主阀的数学模型,建立负载敏感比例多路阀的AMESim模型,验证其动态特性.仿真结果显示:随着黏性摩擦力的增大,系统的稳定性会增加,同时系统响应时间也会增加,因此黏性摩擦力不能设置过大,以5000 N·(m/s)为宜;在比例减压阀与主阀之间添加阻尼孔,能够提高多路阀的稳定性、减小系统压力冲击、提高元件使用寿命;主阀位移的振荡幅值会随着弹簧刚度的增加而增加,使系统的稳定性变差,因此弹簧刚度的设计不可过大,以30 000 N/m为宜;主阀阀芯质量对系统响应几乎没有影响,设计时考虑其强度和耐腐蚀性即可.In order to reduce the commutation impact,flow hysteresis and valve core sticking in the excavator working process,based on the working principle of load-sensitive proportional multiplexing valve,the speed of main valve and pilot valve is matched by adding a damping hole between the proportional pressure relief valve and the main valve. The mathematical model of proportional pressure relief valve is deduced,and the AMESim model of load-sensitive proportional multiplexing valve is established to verify its dynamic characteristics. The simulation results show that with the increase of viscous friction force,the stability of the system will increase,and the response time of the system will also increase,so viscous friction force can not be set too large,with5000 N·( m/s) as the suitable;adding a damping hole between the proportional pressure relief valve and the main valve can improve the stability of the multi-way valve;with the increase of spring stiffness,the oscillation amplitude of main valve displacement increases,which causes the stability deterioration,so the design of spring stiffness should not be too large with 30 000 N/m as the suitable;the quality of the main valve spool has little effect on the system response. In design only its stiffness and corrosion resistance should be taken into consideration.

关 键 词：挖掘机负载敏感比例多路阀 AMESim模型 动态特性 

分 类 号：TH137[机械工程—机械制造及自动化]