单喷嘴挡板阀特性分析及流场仿真  

Characteristics Analysis and Flow Field Simulation of Nozzle Baffle Valve

作　　者：吴凤民[1] 拓万兵[1] WU Feng-min;TUO Wan-bing(Yinchuan College,China University of Mining and Technology,Yinchuan Ningxia 750021,China)

机构地区：[1]中国矿业大学银川学院

出　　处：《机械研究与应用》2019年第5期22-23,26,共3页Mechanical Research & Application

基　　金：宁夏高等学校科研项目:阀门定位器用喷嘴挡板阀仿真分析及结构优化(编号:NGY2018-263)

摘　　要：喷嘴挡板阀是电/气阀门定位器核心部件,配合电力矩马达,可实现较低电压-较大气压之间的转化,其性能直接决定定位器定位性能优劣。喷嘴挡板阀性能受到诸多因素影响,其中,温度是一个主要影响因子,温度变化会影响气流流速,进而影响喷嘴挡板阀内气体流场特性,从而影响输出特性。利用ANSYS Workbench CEX对单喷嘴挡板阀进行流场分析,研究温度对阀内流场影响,仿真表明:以0.4 MPa的压缩空气为介质,随着温度升高,阀门背压腔压力恒定,但受室温影响较大,在控制稳定性要求高的控制系统中,需保持环境恒温。Nozzle baffle valve is the core component of electric/gas valve positioner which can realize the conversion between lower voltage and higher atmospheric pressure combined with the torque motor;its performance directly determines the positioning performance of positioner.The performance of nozzle baffle valve is affected by many factors;among them,temperature is a major influence factor.Temperature change will affect the flow velocity,and then affect the gas flow field characteristics in the nozzle baffle valve,thereby affect the output characteristics.The flow field influenced by temperature of the single nozzle flapper valve is analyzed by the ANSYS Workbench CEX.The simulation results show that with 0.4 Mp compressed air as the medium,as the temperature increases,the pressure of valve back pressure cavity is constant,which is greatly influenced by the room temperature.It needs to keep constant temperature environment in the control system with high control stability requirements.

关 键 词：喷嘴挡板阀 温度变化 流场仿真 

分 类 号：TM921[电气工程—电力电子与电力传动]