摘要
超临界汽轮机调节级承担着较大的焓降,温度梯度更大,会引起高压缸各级相当大的热应力和热变形,特别是调节级动叶栅及调节级处的转子表面的温度变化较为剧烈,这将影响机组的启停及变工况速度,不利于机组的调峰。而本文以某600MW超超临界汽轮机为例,建立了调节级动叶栅的有限元分析模型,模拟出整个动叶栅及转子表面的温度分布图,为研究超超临界汽轮机各级叶片和转子热应力的分析提供了理论基础,并为机组的启动优化提供了参考。
The supercritieal units and even ultra-supercritieal turbines have more enthalpy drop and temperature gradient. Taking a 600MW uhra-supereritieal steam turbine as an example in this paper, the finite element analysis model of governing blade was built by the finite element software, and temperature field was simulated. By the resuh, we can know which part of the governing blade suffers largest thermal stress.
出处
《科技信息》
2012年第29期10-10,21,共2页
Science & Technology Information
基金
沈阳工程学院科技基金项目(LGQN-1013)资助
关键词
超超临界
调节级
动叶栅
温度场
Ultra-supercritical turbine
Governing stage
Blade
Temperature field
