PTA装置第一结晶器液位控制角阀振动分析与技术改进  

Vibration Analysis and Technical Improvement of the First Crystallizer Liquid Level Control Angle Valve for PTA Plant

作　　者：陈刚 陈彦 韩良云 CHEN Gang;CHEN Yan;HAN Liang-yun(Sinopec Yizheng Chemical Fibre Co.,Ltd.,Yizheng 211900,Jiangsu,China;Wuxi Smart Auto-Control Engineering Co.,Ltd.,Wuxi 214112,Jiangsu,China)

机构地区：[1]中国石化仪征化纤有限责任公司,江苏仪征211900 [2]无锡智能自控工程股份有限公司,江苏无锡214112

出　　处：《阀门》2025年第2期176-182,共7页Chinese Journal of Valve

摘　　要：针对某大型PTA装置第一结晶器位号为LV-5501-1的液位控制角阀,在装置运行过程中出现的阀门阀杆高频振动、异响、填料外漏等问题,初步分析了故障产生的原因,包括阀杆直径偏小、阀芯支撑不足、执行机构支架刚性不足及工况条件影响等。应用基于Workbench有限元分析的数值模拟方法确认了故障分析的准确性,同时提出了增加阀杆直径、阀体与阀座之间增加支撑座、执行机构端部增加弹性支撑的改善措施,采用基于Workbench有限元分析的数值模拟方法验证了改善措施的可行性,并实施了技术改进,跟踪了技术改进后的验证结果。本研究对同类型控制角阀的选型、设计与改造具有借鉴意义。Aiming at the problems of high-frequency vibration,abnormal noise and packing leakage of the valve stem during the operation of the liquid level control angle valve with the first crystallizer position number of LV-5501-1 in a large PTA plant,the causes of the faults are preliminarily analyzed,including the small diameter of the valve stem,the insufficient support of the valve core,the insufficient rigidity of the actuator bracket and the influence of working conditions.The numerical simulation method based on Workbench finite element analysis is used to confirm the accuracy of the fault analysis.At the same time,the improvement measures of increasing the diameter of the valve stem,increasing the support seat between the valve body and the valve seat,and increasing the elastic support at the end of the actuator are proposed.The numerical simulation method based on Workbench finite element analysis verifies the feasibility of the improvement measures,and the technical improvement is implemented,and the verification results after the technical improvement are tracked.This study has reference significance for the selection,design and transformation of the same type of control angle valve.

关 键 词：PTA 结晶器 控制角阀 振动 数值模拟 

分 类 号：TH134[机械工程—机械制造及自动化]