国产300MW机组高压调节汽门阀杆断裂事故分析  

Analysis of crack failure of high pressure control valve stem on the indigenous 300MW steam turbine

作　　者：李祥苓[1] 林西奎 韩奎政[1] 王富楼[1] 周伟[1] 陈自雨 

机构地区：[1]邹县发电厂,山东邹县273522

出　　处：《中国电力》2002年第10期21-24,共4页Electric Power

摘　　要：详细分析国产300MW机组高压调节汽门阀杆在碟阀与碟套之间发生低频振动造成阀杆在退刀槽部位因应力集中产生断裂的主要原因,并采取了一系列改进措施,杜绝了阀杆断裂这一重大隐患,取得显著成效。This paper analyzed in detail the crack failure of high pressure control valve stem on the indigenous300MW steam turbines in Shandong Zouxian Power Plant .It considered that the main cause for the stem crack failure was:low frequency vibration existed be-tween valve disk and valve guide,which resulted in stress concentration at the cutting tool withdrawal groove.After a series of improve-ment measures were taken,the major hidden danger of valve stem crack was put to end to,with remarkable effect achieved.

关 键 词：300MW机组 高压调节汽门 阀杆断裂 事故分析 汽轮发电机组 

分 类 号：TK263.7[动力工程及工程热物理—动力机械及工程]