纯水比例溢流阀静态特性的仿真与试验  

Simulation and experiment on static characteristic of water hydraulic proportional pressure relief valve

作　　者：张增猛[1] 周华[1] 高院安 陈英龙[1] 

机构地区：[1]浙江大学流体传动及控制国家重点实验室,浙江杭州310027 [2]中国船舶重工集团第七○七研究所九江分部,江西九江332007

出　　处：《煤炭学报》2009年第11期1569-1573,共5页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(50775199);浙江省科技支撑和引导计划资助项目(2007C21057)

摘　　要：以带球阀比例节流先导级的三级座式纯水比例溢流阀为对象,在结构分析和数学建模的基础上,建立了阀的AMESim模型,仿真分析了稳态液动力、比例电磁铁、阀芯摩擦力等对阀静态特性的影响,并与试验对比.结果表明:阀芯摩擦力及力放大杠杆结构降低了阀的静态性能,阀的滞环大,且随控制信号增大的可控线性段窄,阀在低压段的滞环大于高压工况.阀的大滞环和严重的非线性降低了闭环系统稳定性,应通过改进结构和控制补偿等措施改善静态特性.A three-stage water hydraulic proportional pressure relief valve, with ball seat valve as the throttle control pilot stage, was investigated on the static characteristic. An AMESim model was built based on structure and mathematic analysis. The friction at spool, proportional electromagnetic actuator and steady flow force, which cause the valve hysteresis, were analyzed through simulation. The experiment results were also analyzed and compared to simulation results. The investigation shows that the large hysteresis mainly comes from flow force, hysteresis of electromagnetic actuator, and friction. Due to the static and coulomb friction and the structure of lever, the range of the input signal responding to pressure increasing section is narrower than pressure decreasing. The width of hysteresis is larger at low pressure than high pressure. For the reason of nonlinearity and large hysteresis of the valve, closedloop control will be unstable and large oscillation may be induced. It should be improved through structure optimization or control compensation.

关 键 词：纯水液压 比例溢流阀 静态特性 AMESIM仿真 滞环 

分 类 号：TH137.52[机械工程—机械制造及自动化]