摘要
汽轮机转子材料多采用30CrMoV低碳合金钢,其物性参数随温度变化显著。所建转子热应力计算模型,考虑了转子材料物性随温度变化的影响。通过仿真试验,分析了国产某600MW超临界汽轮机冷态、温态、热态和极热态4种启动工况下转子热应力的变化趋势,并与常物性转子热应力模型的计算结果进行了比较。结果表明:转子材料物性参数随温度的变化显著影响其启动热应力的大小,为提高汽轮机转子热应力在线监测模型的计算精度提供有益参考。
In most cases steam turbine rotors are made of 30CrMoV low carbon alloy steel,the physical property parameters of which change significantly with temperature.The model established for calculating rotor thermal stresses has taken into account the influence of the temperature-dependent change of rotor-material physical property.Through a simulation test,analyzed was the variation tendency of rotor thermal stresses in a domestically-made 600 MW supercritical steam turbine under the following four start-up operating conditions,namely,cold-state,warm-state,hot-state and extremely-hot-state.Moreover,the tendency in question was compared with that obtained from a thermal-stress model featuring a rotor of constant physical property.It has been shown that the change of rotor material physical parameters with temperature will significantly influence the magnitude of the start-up thermal stresses.The above finding can provide a helpful reference for enhancing the calculation accuracy of an on-line monitoring model involving turbine-rotor thermal stresses.
出处
《热能动力工程》
CAS
CSCD
北大核心
2008年第1期21-23,共3页
Journal of Engineering for Thermal Energy and Power
关键词
汽轮机转子
物性
热应力
模型
steam turbine rotor,physical property,thermal stress,model
作者简介
刘彦丰（1965-），男，河北邢台人，华北电力大学副教授．
