常规岛汽机旁路调节阀抗震性能研究  

Research on Anti-vibration Performance of Bypass Control Valve of Conventional Island Steam Turbine

作　　者：张浩然 蒋晓红 冯浩 尹会全 王宜雪 李树勋[3] ZHANG Hao-ran;JIANG Xiao-hong;FENG Hao;YIN Hui-quan;WANG Yi-xue;LI Shu-xun(China Nuclear Power Engineering Co.,Ltd.;Chongqing Chuanyi Control Valve Co.,Ltd.;School of Petrochemical Engineering,Lanzhou University of Technology)

机构地区：[1]中广核工程有限公司 [2]重庆川仪调节阀有限公司 [3]兰州理工大学石油化工学院

出　　处：《化工机械》2024年第1期77-83,共7页Chemical Engineering & Machinery

摘　　要：为防止常规岛汽机旁路调节阀在地震期间发生共振,致使调节阀与连接管道受到破坏,使用ANSYS软件中Modal模块,对DN 300 Class900汽机旁路调节阀进行模态分析,得到调节阀各阶自振频率。当调节阀的基频高于33 Hz时,使用等效静力法。对调节阀进行抗震分析,得到阀门整体及各部件的等效应力和变形。根据ASME BPVC-Ⅲ中对核级设备抗震的规定,对调节阀在承受地震载荷时的应力强度进行评定,结果表明:阀体、阀盖、阀杆、支架最大应力分别为133.63、77.52、29.46、71.54 MPa,中法兰螺栓最大拉应力为183.23 MPa,最大剪应力为15.36 MPa,均满足抗震强度要求。For purpose of protecting conventional island steam turbine bypass regulating valves against resonating during the earthquake which may damage the regulating valve and the connecting pipelines,the ANSYS finite element analysis software was used to perform a modal analysis on the DN 300 Class900 turbine bypass regulating valve.When the natural frequency is higher than 33 Hz,the equivalent static method can be used for seismic analysis to obtain equivalent stress and deformation of the whole valve and its components.According to the provisions for seismic resistance of nuclear grade equipment stipulated in ASME BPVC-Ⅲ,the stress intensity assessment was carried out to show that,the maximum stress of the valve body,bonnet,valve stem,and bracket is 133.63 MPa,77.52 MPa,29.46 MPa and 71.54 MPa,respectively.The maximum tensile stress of the middle flange bolt is 183.23 MPa,and the maximum shear stress is 15.36 MPa,they all meet the seismic strength requirements.

关 键 词：旁路调节阀 抗震性能 等效静力法 应力评定 

分 类 号：TM623[电气工程—电力系统及自动化]