[关键词]
[摘要]
以某超超临界机组的高压模块的平衡盘作为研究对象,利用ABAQUS软件建立高压模块的轴对称模型,并根据电厂实际运行工况的蒸汽温度压力数据计算加载边界条件,分析了实际启动和满负荷运行工况下高压平衡盘及前后密封区域的温度、应力和位移的变化及密封处径向间隙变化规律。研究表明:运行过程中服役工况下温度和应力产生了波动,在启动阶段最为剧烈,稳态运行时波动幅度较小;启动阶段径向间隙会明显减小。
[Key word]
[Abstract]
With the highpressure module balance disc of an ultrasupercritical steam turbine as the research object,ABAQUS is used to establish an axisymmetric model of a highpressure module,and the loading boundary conditions are calculated based on the steam temperature pressure data of the actual operating conditions of the power plant.In this paper,the changes of temperature,stress and displacement of the highpressure balance disc and the front and rear sealing areas,and the variation of radial clearance at the seal are analyzed under the actual starting and fullload operating conditions.The results show that the temperature and stress In addition,the radial clearance during the start state is significantly reduced.
[中图分类号]
TK262
[基金项目]
国家重点研发计划专项(2018YFB0905205);西华大学创新人才项目(xjjg2017083);教育部重点实验室开放课题(szjj2017-089)