汽轮机高压调阀中分面漏汽原因分析及改进

Cause Analysis and Improvement of Steam Leakage of High Pressure Control Value Split in Turbines

针对某型号超临界600 MW汽轮机高压调阀多次出现阀盖与阀壳结合面漏汽的问题,结合解体检查情况对漏汽原因进行深入分析,制定处理方案。通过金属缠绕垫改型更换、密封面修磨、阀盖螺栓紧固等检修改进措施,保证了结合面的长效密封,彻底解决了漏汽问题。

Aiming at steam leakage happened many times between valve deck and valve casing in high pres-sure valve in one 600 MW supercritical turbine and in combination with disassembling inspection condition, this paper performs an in-depth analysis on steam leakage causes and works out treatment scheme. Through adoption of maintenance improvement measures such as replace and modify spiral wound gasket , burnish sealing face and fasten the valve deck, the long-term sealing of joint surface is guaranteed and the steam leakage is thoroughly eliminated.