【作者】 刘伟； 徐兵； 杨华勇； 刘英杰；

【Author】 LIU Wei XU Bing YANG Huayong LIU Yingjie(State Key Laboratory of Fluid Power Transmission and Control,Zhejiang University,Hangzhou 310027)

【机构】 浙江大学流体传动及控制国家重点实验室；

【摘要】 应用电比例阀和电比例泵的电子流量匹配液压系统采用泵阀同步控制方式,基本消除了传统负载敏感系统中泵滞后阀控现象,不需压力闭环反馈控制和预设泵出口压力与最高负载压力之间的压力差值,因此在动态性能和节能方面有很大的提高,充分体现了液压系统柔性与效率的结合,兼顾了系统节能性与操控性能。在考虑泵转速,电比例泵控制先导油消耗等情况下,采用流量补偿措施,对比分析传统负载敏感系统与电子流量匹配液压的能耗特性。研究阀前压力补偿阀的电子流量匹配液压系统在流量饱和工况下的流量分配方法与能耗情况。与传统负载敏感系统相比,电子流量匹配液压系统不仅能提高动态性,节能性能也得到提高。更多还原

【Abstract】 Electrohydraulic flow matching hydraulic system with the electric proportional valve and electric proportional pump works in a valve and pump synchronous control mode.It eliminates the hysteresis phenomenon of pump and valve in the traditional load-sensing system nearly.Closed-loop feedback control of pressure and preset pressure difference between pump and maximum load pressure are not needed.It reflects the combination of flexibility and efficiency of hydraulic system,improving energy efficiency and control performance.Energy consumption characteristic is comparatively analyzed of traditional load sensing hydraulic system and electrohydraulic flow matching hydraulic system.Energy consumption and flow distribution method of electrohydraulic flow matching system with pressure-compensated valve of hydrostat upstream configuration in the state of flow saturation are studied.Compared with the traditional load-sensing system,electrohydraulic flow matching hydraulic system can not only improve the dynamic characteristic,but also energy-efficient performance.更多还原