电液伺服阀喷嘴挡板阀流场分析  

On the Flow Field of Nozzle Flapper Valve of Electro-hydraulic Servo Valve

作　　者：訚耀保[1] 黄伟达[1] 张曦[1] 

机构地区：[1]同济大学机械工程学院,上海200092

出　　处：《流体传动与控制》2011年第3期1-4,共4页Fluid Power Transmission & Control

基　　金：航空科学基金资助项目(20090738003);国家自然科学基金资助项目(50775161);国家"863"高科技计划资助项(2007AA05Z119)

摘　　要：分析了力反馈两级电液伺服阀喷嘴挡板阀处的流场。首先利用Gambit软件进行网格划分,建立Solidworks三维模型,采用CFD计算流体动力学方法得到了喷嘴挡板一级阀的压力场和速度场。结果表明:固定节流口、喷嘴挡板间隙和回油阻尼口处存在节流减压现象,最高流速发生在固定节流口和喷嘴挡板间隙处。分析结果对喷嘴挡板阀的数字化设计及性能预测具有一定的参考意义。This paper analyzes the flow field of nozzle flapper valve of electro-hydraulic servo valve. The 3D nozzle flapper model of the nozzle flapper is obtained by using Solidworks. Mesh generation by using Gambit, and the pressure and velocity flow field are obtained by CFD and Fluent software. Throttle pressure drops exist in the fixed throt- fling port, nozzle flapper gap and the damping orifice. The maximum velocity of valve appears at somewhere of the fixed throttling port and nozzle flapper gap. The results are useful for design and characteristic predict of the nozzle flapper servo valve.

关 键 词：电液伺服阀 喷嘴挡板 流场 CFD 

分 类 号：TH137[机械工程—机械制造及自动化]