摘要
以提高机组的安全、经济运行为目的,利用大型通用有限元软件ANSYS,依据某电厂660MW超超临界机组热态启动曲线,对汽轮机转子进行温度场、应力场的计算;同时根据解析递推算法计算汽轮机转子热应力,比较分析两种计算结果,并进一步对影响这些部位热应力的因素进行研究,结果表明,汽轮机转子的调节级叶轮根部、高中压缸之间轴肩与中压第一级叶轮根部存在较大的应力集中,转子体结构、蒸汽温升率、换热系数、运行参数对转子热应力影响较大。
For the purpose of improving the safe and economic operation of the unit,based on the rated curve of hot state start-up,the temperature field and stress field of a 660 MW ultra supercritical steam turbine rotor were presented by software ANSYS.At the same time,the thermal stress of the steam turbine rotor was calculated based on the analytical recursion.Through comparison of two calculated results and further analysis on the influential factors of thermal stress,it shows that the impeller root of governing stage,the shaft shoulder of high pressure cylinder and the first level of intermediate pressure cylinder have larger stress concentration.Rotor structure,the heating rates,coefficient of heat transfer and operating parameters have bigger effects on the thermal stress of the rotor.
出处
《现代电力》
北大核心
2012年第1期60-64,共5页
Modern Electric Power
关键词
汽轮机转子
温度场
有限元法
递推算法
热态启动
steam turbine rotor
temperature field
finite element method
recursion
hot start
