某电厂燃气轮发电机导电螺钉断裂事故分析  

Analysis on the Fracture Accident of Gas Turbine Generator Conductive Screw

作　　者：曾宪英 Zeng Xianying(Nanjing Turbine&Electric Machinery(Group)Co.,Ltd.,Nanjing 210037,China)

机构地区：[1]南京汽轮电机(集团)有限责任公司,南京210037

出　　处：《燃气轮机技术》2021年第1期60-63,共4页Gas Turbine Technology

摘　　要：某9E级燃气电厂,一台发电机出现失磁跳机。机组完全停下后,在运行现场检查后发现,内侧滑环导电螺钉头部断裂飞出,造成导电螺钉及滑环烧毁。确认损坏部件后抢修,机组开机并网一切正常。将断裂的导电螺钉进行分析,并对其做金相组织显微分析、成分检验和强度、硬度检验,并结合另一根完好螺钉及同批次螺钉检查,确定事故原因,以此为依据对结构材料进行修改,保证机组未来运行安全。A 9E-class gas turbine power plant experienced a loss of magnetism and tripping.After the unit came to a complete stop,it was found after inspection of the operation site that the head of the conductive screw of the inner slip ring broke and flew out,causing the conductive screw and slip ring to burn out.After confirming the damaged parts,make an emergency repair,and the unit is turned on and connected to the grid normally.Analyze the broken conductive screw and do metallographic microscopic analysis,composition inspection,strength and hardness inspection,and combine the state of another intact screw and the inspection of the same batch of screws to determine the cause of the accident.Modify the structural materials to ensure the safe operation of the unit in the future.

关 键 词：9E燃气轮发电机 导电螺钉 事故分析 断裂 锆铜 

分 类 号：TK478[动力工程及工程热物理—动力机械及工程]