晃电导致汽轮机速关阀关闭的原因分析及处理  

Analysis and Treatment of the Reason for the Closing of the Turbine Quick Closing Valve Caused by Electric Shock

作　　者：徐伟[1] Xu Wei(Sinopec Tahe Refining&Chemical Co.,Ltd.,Xinjiang 842000,China)

机构地区：[1]中国石化塔河炼化有限责任公司,新疆842000

出　　处：《燃气轮机技术》2024年第4期59-63,共5页Gas Turbine Technology

基　　金：中科院率先行动百人计划(B类Y9291282U1)。

摘　　要：介绍了延迟焦化装置电网晃电时汽轮机速关阀关闭机组停车的现象及特点。在机组运行、停车以及检修期间三个阶段对汽轮机异常停机的六个方面进行分析,认为汽轮机速关阀关闭的原因是晃电后润滑油泵切换期间控制系统蓄能器破裂和速关阀油缸内活塞密封圈间隙过大,使速关油泄压过快,速关油压不足以克服弹簧作用力,速关阀关闭,机组停车。This article introduces the phenomenon and characteristics of the shutdown of the unit when the turbine quick closing valve was closed during power grid shaking in the delayed coking unit.During the three stages of unit operation,shutdown,and maintenance,an analysis was conducted on six aspects of abnormal shutdown of the steam turbine.It was found that the reason for the closure of the turbine quick closing valve was due to the rupture of the control system accumulator and excessive clearance between the piston sealing rings in the quick closing valve cylinder during the switching of the lubricating oil pump after shaking electricity,which caused the quick closing oil to release pressure too quickly.The quick closing oil pressure was insufficient to overcome the spring force,and the speed closing valve closed,resulting in the shutdown of the unit.

关 键 词：汽轮机 速关阀 晃电 蓄能器 密封圈 

分 类 号：TK478[动力工程及工程热物理—动力机械及工程]