超超临界汽轮机进汽连接组件强度分析

Strength Analysis of Valve Connection in USC Steam Turbines

通过有限元软件ABAQUS对超超临界汽轮机进汽连接组件进行仿真,得到了该组件在工作环境下的温度场、应力场以及位移变化,并采用Bailey-Norton方程进行蠕变计算,根据蠕变计算结果对模型进行优化改进,提高了密封效果和连接组件的运行可靠性,为汽轮机U型环密封优化设计提供了参考价值。

The valve connection in USC steam turbines is analyzed by FEM,and ABAQUS is used for simulation so that the temp.and stress field and displacement variations of connection under working environment are obtained.At the same time,Bailey-Norton equation is adopted for creep calculation.Based on the results,the structure is optimized at last.Finally,it shows a better operation reliability and seal effect for valve connection,and is useful for turbine U-ring seal design.