核电厂旋启式止回阀的流固耦合动态分析及优化策略  

Fluid-Structure Interaction Dynamic Analysis and Optimization Strategies for Swing Check Valves in Nuclear Power Plants

作　　者：高红波 吴俊 宋亮 周帅 林磊[1] 陈明亚[1] GAO Hong-bo;WU Jun;SONG Liang;ZHOU Shuai;LIN Lei;CHEN Ming-ya(Suzhou Nuclear Power Research Institute,Suzhou 215004,Jiangsu,China;Yangjiang Nuclear Power Co,Ltd.,Yangjiang 529500,Guangdong,China)

机构地区：[1]苏州热工研究院有限公司,江苏苏州215004 [2]阳江核电有限公司,广东阳江529500

出　　处：《阀门》2024年第5期592-597,共6页VALVE MAGAZINE

摘　　要：旋启式止回阀在核电厂管道系统中频繁遇到阀瓣磨损和撞击损伤问题,但其在变压差工况下的动态特性和失效机理尚不明确。本文基于双向流固耦合方法,通过数值模拟系统研究了旋启式止回阀的动态响应和阀瓣损伤行为。结果表明,流体惯性效应主导阀瓣快速关闭过程,负压诱导的入口压差和阀瓣多次弹跳碰撞是导致阀门失效的主要原因。提出了阀瓣转轴处设置旋转阻尼器的创新减振方案,可有效抑制碰撞载荷。本研究加深了对旋启式止回阀失效机理的认识,为阀门优化设计提供理论基础。Swing check valves frequently encounter problems of disc wear and impact damage in the piping systems of nuclear power plants,but their dynamic characteristics and failure mechanisms under variable pressure conditions remain unclear.Based on the bidirectional fluid-structure interaction method,this study systematically investigates the dynamic response and disc damage behavior of swing check valves through numerical simulations.The results show that fluid inertia effects dominate the rapid closing process of the disc,and the inlet pressure difference induced by negative pressure and multiple bouncing collisions of the disc are the main causes of valve failure.An innovative damping scheme with a rotational damper installed at the disc hinge is proposed,which can effectively suppress the impact load.This research deepens the understanding of the failure mechanism of swing check valves and provides a theoretical basis for valve design optimization.

关 键 词：止回阀 双向流固耦合 碰撞 优化 

分 类 号：TH134[机械工程—机械制造及自动化]