基于CFX仿真分析汽轮机再热蝶阀卡阀现象

摘要

汽轮机再热蝶阀是汽轮机组的重要元件，该类型蝶阀在冷起动过程中经常发生卡阀。研究表明，由于零件间热量传递速度存在差异，所以在冷起动过程中，不同零件物理性能差异导致了径向间隙和轴向间隙的变化不同。本文采用 CFX流固耦合有限元法定量分析再热蝶阀在冷起动过程中阀体和阀瓣之间的间隙变化，这对于解决该类工程问题具有重要的理论价值和指导意义。%The reheat butterfly valve is a vital component in the steam turbine unit,mechanical j amming often emerges in such mechanisms during the cold start.Research showed that the different physical property leads to the different trans-mission speed of heat in parts,so the radial and axial clearance varies greatly in the process of cold start.CFX fluid-solid coupling finite element method was used to quantitatively analyze the clearance variation between valve body and valve clack, which has important theoretical value and realistic guiding significance to the solution of such engineering problems.