电液比例阀开启过程中液动力的计算  

Calculation for Flow Force of Electro-hydraulic Proportional Valve in Opening Process

作　　者：史青[1,2] 冀宏[1,2] 王金林[1,2] 解浩[1,2] 

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]甘肃省液压气动工程技术研究中心,甘肃兰州730050

出　　处：《液压与气动》2015年第11期30-34,共5页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(51465033);湖南省科技厅重大专项(2011FJ1046)

摘　　要：为准确计算出电液比例阀开启过程中的液动力,首先建立了三位四通电液比例阀AMESim模型,得到阀口压力、流量的响应曲线,将入口流量和出口压力响应曲线拟合为函数,进而将拟合函数作为边界条件,通过用户自定义函数(UDF)动态链接至流场计算中,利用Fluent滑移网格方法计算出一个完整滑阀阀腔开启过程中的液动力变化情况。结果表明:电液比例阀开启过程可划分为阀口流量呈准线性增大和流量恒定两个区段,液动力随着阀口开度的增大先快速增大后逐渐减小,最大值出现在阀口流量准线性增大区段和流量恒定区段转折点处。This paper aims to accurately calculate the flow force of electro-hydraulic proportional valve in opening process. The AMESim model of 4/3 electro-hydraulic proportional valve is established to acquire the response curve of flow and pressure. Fit the inlet flow and outlet pressure response curve as boundary conditions and then dynamically link to flow field calculation through User-Defined Function. The changing of flow force in opening process is calculated by making use of sliding mesh. The result shows that the opening process of valve can be divided into flow linearly increase first and constant later. With the spool port opening, the flow force increases rapidly and then decreases. The maximum flow force occurs in the turning point.

关 键 词：比例阀 开启过程 液动力 UDF 滑移网格 

分 类 号：TH137[机械工程—机械制造及自动化]