基于ANSYS的阀门定位器喷嘴挡板结构优化与分析  

ANSYS-Based Valve Positioner Nozzle Baffle Structure Optimization and Analysis

作　　者：徐利杨 章兰珠[1] XU Liyang;ZHANG Lanzhu(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学机械与动力工程学院,上海200237

出　　处：《自动化仪表》2022年第10期14-16,22,共4页Process Automation Instrumentation

基　　金：国家自然科学基金资助项目(51975213)。

摘　　要：阀门定位器是工业领域重要的控制仪器,能够有效改善气动调节阀的动静态特性。电/气(I/P)转换器作为阀门定位器内的核心部分,用于控制定位器的输出气压。为探究喷嘴挡板结构参数对定位器的影响、提高控制精度,对阀门定位器I/P转换器中的喷嘴挡板模块工作原理进行了研究,并建立了数学模型。基于该数学模型,对喷嘴挡板的恒节流孔与喷嘴孔直径作了参数优化,并利用ANSYS FLUENT仿真软件进行流场分析。基于流场分析的结果,对喷嘴挡板的其余结构参数进行优化。优化结果表明,合理的结构参数可获得更宽的线性范围与更高的灵敏度,从而提升阀门定位器的控制效果。利用ANSYS FLUENT进行仿真分析,可有效降低设计成本。该研究对定位器国产化替代工作具有参考意义。Valve positioner is an important control instrument in industry,which can effectively improve the dynamic and static characteristics of pneumatic control valves.Current intensity/pneumatic(I/P)converter,as the core part within the valve positioner,serves to control the output air pressure of the positioner.In order to investigate the influence of nozzle baffle structure parameters on the positioner and improve the control accuracy,the working principle of the nozzle baffle module in the valve positioner I/P converter is studied and a mathematical model is established.Based on this mathematical model,the parameters of the nozzle baffle’s constant throttle and nozzle hole diameters are optimized,and the flow field analysis is carried out using ANSYS FLUENT simulation software.Based on the results of the flow field analysis,the remaining structural parameters of the nozzle baffle are optimized.The Optimization results show that the reasonable structural parameters can obtain a wider linear range and higher sensitivity to improve the control effect of the valve positioner.Simulation analysis using ANSYS FLUENT can effectively reduce the design cost.The study has reference significance for the local replacement work of positioners.

关 键 词：阀门定位器 喷嘴挡板 电/气转换器 流场分析 ANSYS仿真 

分 类 号：TH86[机械工程—仪器科学与技术]