Analysis and consideration on the handling of the installation standard of low pressurecylinder of steam turbine
汽轮机低压缸安装标高超差处理分析及思考

摘要

某核电厂1号机组汽轮机LP2低压外缸安装期间，发现外缸标高无法调整名义尺寸，直接影响汽轮机后续安装工作，导致常规岛扣缸主线整体滞后数月。本文针对该故障现象进行根本原因分析，并通过计算分析进行处理方案论证，为同类机型类似故障处理提供参考。同时对根本原因进行深入思考，为批量化机组建设及同机型电厂提供参考借鉴，避免类似故障的重发。

Abstract

During the installation of LP2 low pressure outer cylinder of turbine of Unit 1 of a nuclear power plant, it was found that the outer cylinder elevation could not adjust the nominal size, which directly affected the subsequent installation of the turbine, resulting in the overall lag of the main line of the conventional island cylinder for several months. In this paper, the root cause of the fault phenomenon is analyzed, and the treatment scheme is demonstrated through calculation and analysis, which provides a reference for similar fault treatment of similar models. At the same time, the root causes are deeply considered to provide reference for the construction of batch units and power plants of the same type, so as to avoid the recurrence of similar failures.