定量泵负载敏感系统中三通流量阀的阻尼特性分析

摘要

分析了定量泵负载敏感系统中三通流量阀的机械结构和调节原理.建立了三通流量阀中阻尼孔的特性分析模型与三通流量阀压力补偿过程中容腔压力变化的数学模型.用Matlab软件对三通流量阀中影响压力变化的主要结构参数进行了仿真,分析了三通流量阀的阻尼孔直径、阻尼孔长度、左腔容积以及阀芯开口流量增益对其左腔压力变化产生的影响,得出了再设计三通流量阀时阻尼孔、容腔体积和阀芯开口形式应选择合适的尺寸与结构的结论.为定量泵系统中三通流量阀的设计提供了理论依据.%Analyzes the adjusting principle and structure of the 3-way flow valve.The 3-way flow valve is used in the quantitative pump load sensing hydraulic system.The analytical model of the damping hole's characteristic is built and mathematical model of cavity's dynamic-pressure is established in the process of the 3-way flow valve having a load sensing.Then the main structure pa-rameters of the 3-way flow valve is simulated by Matlab software.Those structure parameters can influence the pressure's varia-tion.It concludes 4 parameters can affects the 3-way flow valve's left-pressure in different ways.The damping hole's diameter, the damping hole's length,the left cavity,the valve core's flow-gain of the 3-way flow valve are analyzed.The conclusion that when designing the 3-way flow valve,the damping hole's size,the left cavity's structure,the valve core's shape should be suit-able is produced.This work may offer some theoretical basis for the 3-way flow valve's design which used in the quantitative pump load sensing hydraulic system.