阀芯卡滞的研究进展  

Research progress of valve core clamping

作　　者：罗宇轩 林振浩 母娟 钱锦远[1] LUO Yu-xuan;LIN Zhen-hao;MU Juan;QIAN Jin-yuan(Institute of Process Equipment,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学化工机械研究所,浙江杭州310027

出　　处：《机电工程》2022年第7期865-876,918,共13页Journal of Mechanical & Electrical Engineering

基　　金：国家重点研发计划项目(2021YFB2011300)。

摘　　要：针对阀门工程应用中存在的阀芯卡滞这一问题,以近年阀芯卡滞现象实例为对象,对其产生的原因进行了分析和归纳,对阀芯卡滞现象的形成机理进行了全面总结。首先,将阀芯卡滞原因分为:加工精度或装配误差等引起的机械原因、流体对阀芯作用的不平衡力矩引起的液力原因、高压工况流体黏性发热引起的热力原因,以及颗粒滞留在阀门配合间隙引起的污染原因;然后,对阀芯卡滞现象的实验测量方法、理论模型分析方法、多场耦合分析方法的研究工作进行了总结,对诊断检测、阀门结构改进等阀芯卡滞的预防措施进行了探讨;最后,对上述各项综述内容进行了总结,并指出了今后亟待解决的一些问题及研究方向:综合考虑多种因素的阀芯卡滞问题研究;预防颗粒进入阀芯阀体配合间隙的研究;流体、机械、颗粒污染等3种因素对卡滞影响效果的比较;均压槽和阀芯阀体配合间隙调整之外的预防阀芯卡滞方法,等等。Aiming at the problem of valve core clamping in valve engineering application,taking the example of valve core clamping in recent years as an introduction,the causes of valve core clamping were analyzed and summarized,and the formation mechanism of valve element sticking was comprehensively and deeply understood.The causes of valve core clamping could be divided into:mechanical reasons caused by machining accuracy or assembly errors,hydraulic reasons caused by the unbalanced torque of the fluid acting on the valve core,thermal reasons caused by fluid viscosity and heating under high-pressure conditions,and the pollution reasons caused by particles staying in the matching clearance of the valve.The experimental measurement methods,theoretical model analysis methods,multi-field coupling analysis methods,and preventive measures for valve core clamping such as diagnostic detection and valve structure improvement were summarized.According to the content of the review,some problems to be solved in the future are summarized and pointed out:the research on the clamping problem of valve core considering various factors;study on preventing particles from entering the fit gap between valve core and valve body;comparison of the effects of fluid,machinery and particle pollution on clamping;methods for preventing valve core from clamping in addition to the adjustment of pressure equalizing groove and valve core-valve body fit clearance,etc.

关 键 词：阀门 阀芯卡滞形成机理 热形变 颗粒污染 均压槽 阀芯阀体配合间隙 预防措施 

分 类 号：TH137.52[机械工程—机械制造及自动化]