汽机调节阀阀体三维瞬态温度场及应力场分析  

Three-dimensional Transient Temperature Field of the Valve Body of a Turbine Regulating Valve and the Analysis of Its Stress Field

作　　者：彭震中[1] 丁祝顺[1] 王璋奇[1] 王松岭[1] 

机构地区：[1]华北电力大学机械工程系,河北保定071003

出　　处：《热能动力工程》2002年第1期80-83,共4页Journal of Engineering for Thermal Energy and Power

基　　金：国家电力公司重点学科基金资助项目 (C98B0 9)

摘　　要：提出阀门阀体有限元建模的有效方法 ;采用结构分析有限元方法 ,对国产 12 5MW汽轮机主蒸汽调节阀阀体冷态、温态、热态启停工况的温度场、热应力场、机械应力场、综合应力场进行了分析计算 ,得出了关键点在冷态启停工况详细的温度场及其对应的热应力场的变化规律 ,并给出了阀体在机组温态、热态启停工况下的应力场的计算结果 ;An effective method is proposed for the modeling of a valve body with the help of a finite element method. Through the use of a structural-analysis finite element method an analytical calculation was conducted of the valve body of a main steam regulating valve for a Chinese-made 125 MW steam turbine. It includes such a variety of items as the valve body temperature field, thermal stress field, mechanical stress field and comprehensive stress field under the startup and shutdown operating conditions respectively at cold, warm and hot states. As a result, obtained were the detailed temperature field at key points under cold startup and shut-down operating conditions as well as the variation relationship of its corresponding thermal stress fields. In addition, also presented are the stress field calculation results of the valve body under the warm and hot startup and shutdown operating conditions with the loss of valve body service life being evaluated at various-state startups.

关 键 词：阀体 有限元 温度场 应力场 汽轮机 调节阀 三维瞬态 发电厂 

分 类 号：TM621.3[电气工程—电力系统及自动化] TM621.7