先导式疏水阀阀芯组件动力特性分析  

Dynamic characteristic analysis of a pilot-operated steam trap valve plug components

作　　者：李树勋[1,2] 胡建华[1] 李连翠[1] 徐晓刚[1] 张兴[1] 

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050 [2]机械工业泵及特殊阀门工程研究中心,甘肃兰州730050

出　　处：《江苏大学学报（自然科学版）》2013年第6期643-649,共7页Journal of Jiangsu University：Natural Science Edition

基　　金：科技部科技人员服务企业行动项目(2009GJG10005);兰州理工大学"优秀青年教师培养计划"资助项目(Q201002)

摘　　要：针对高温高压大排量下先导式蒸汽疏水阀内流体作用下阀芯组件振动强烈的问题,运用顺序耦合法研究了流固耦合和弹簧力预应力作用下先导式疏水阀阀芯组件动力学特性.建立静态与预应力条件的阀芯组件动力学方程,采用ANSYS/Workbench有限元软件,计算阀芯组件的频率和振型;探讨了不同细长比、不同约束方式对阀芯组件模态的影响趋势.结果表明:在预应力作用下,阀芯组件频率与振型的变化不大;阀芯直径越大,其模态频率越大;采用一端固定一端自由约束时其频率最小,两端固定约束时频率最大.To solve the problem of strong vibration of the pilot-operated steam trap under the conditions of high temperature,high pressure and high flow rate,the dynamic analysis of a pilot-operated steam trap valve plug components was carried out based on spring force and fluid-structure coupling effect by sequence coupling technique.The dynamic equations of the valve plug components with static and prestress conditions were established.The frequencies and vibration modes were obtained by ANSYS/Workbench code.The effect trends of the length-diameter ratio and restraint modes on the modal frequency were discussed.The results show that the pre-stress conditions have slight impact on the natural frequencies and vibration modes.The frequency is increased with the increase of diameter.The maximum frequency is obtained by double-end-fixed with the minimum value by fixing at one end and free.

关 键 词：蒸汽疏水阀 流固耦合 模态分析 有限元 预应力模态 

分 类 号：TB53[理学—物理] TH134[理学—声学]