宽温域下偏转板电液伺服阀温度场特性  

Temperature field characteristics of deflector electro-hydraulic servo valve in the wide temperature range

作　　者：严成坤 刘小雪 郑树伟 王生荣 冯东玲 訚耀保[2] YAN Chengkun;LIU Xiaoxue;ZHENG Shuwei;WANG Shengrong;FENG Dongling;YIN Yaobao(Changchun Control Technology Co.,Ltd.,Aero Engine Corporation of China,Changchun 130102,China;School of Mechanical Engineering,Tongji University,Shanghai 201804,China)

机构地区：[1]中国航发长春控制科技有限公司,长春130102 [2]同济大学机械与能源工程学院,上海201804

出　　处：《流体机械》2024年第3期49-56,共8页Fluid Machinery

基　　金：囯家自然科学基金项目(52175059)。

摘　　要：针对电液伺服阀在极端温度服役环境下复杂零件各部位的温度分布规律无法测量的难题,在工作介质温度为-40~140℃和环境温度为-55~250℃的工况下,建立了一种考虑传热过程的电液伺服阀及其精密部件的温度分析方法,取得了各零部件的温度分布规律及其影响因素。结果表明:力矩马达壳体以及阀体的外表面温度最为恶劣,温度接近环境温度,阀体从外表面到内部呈现温度梯度;阀芯、阀套与工作介质直接接触,温度状况较好;力矩马达从上至下具有较大温度梯度,如高温工况下温度差值约为66℃,其中弹簧管上、下温差约为45℃,反馈杆上、下温差约为26℃。较大的温度梯度极易造成材料刚度、偶件配合尺寸等变化,显著影响服役性能,在材料选择上需要充分考虑;环境温度显著影响力矩马达组件中不与工作介质接触的部分,且对磁性材料性能、气隙、线圈均产生明显影响;介质温度通常低于环境温度,与介质接触的零部件受环境温度影响较小。本文分析方法和结果可用于宽温域下电液伺服阀的设计与分析。In order to solve the problem that the temperature distribution law of each location of the complex parts of the electrohydraulic servo valve can not be measured under the extreme temperature service environment,a temperature analysis method of the electro-hydraulic servo valve and its precision components considering the heat transfer process was established under the working conditions of the working medium temperature of-40~140℃and the ambient temperature of-55~250℃,and the temperature distribution law of each component and its influencing factors were obtained.The analysis results show that the outer surface temperature of the torque motor shell and the valve body is the worst,which is close to the ambient temperature.The valve body presents a temperature gradient from the outer surface to the inside.The valve core and valve sleeve are in direct contact with the working medium,and the temperature condition is good.The torque motor has a large temperature gradient from top to bottom,the temperature difference is about 66℃under high-temperature conditions,of which the temperature difference between the upperand lower parts of the spring tube is about 45℃,and the temperature difference between the upper and lower parts of the feedback rod is about 26℃.Large temperature gradients can easily cause changes in material stiffness and even matching size,which significantly affects service performance,and needs to be fully considered in material selection.Ambient temperature has a significant influence on the parts of the torque motor assembly that are not in contact with the working medium and also has a significant influence on the properties of magnetic materials,air gap,and coil.The medium temperature is usually lower than the ambient temperature,and the parts in contact with the working medium are less affected by the ambient temperature.The analysis method and results can be used for the design and analysis of electro-hydraulic servo valves in a wide temperature range.

关 键 词：偏转板伺服阀 宽温域 温度场 力矩马达 反馈杆组件 

分 类 号：TH137[机械工程—机械制造及自动化]