125 MW机组低压转子末级叶片围带断裂分析及改造  

Breaking Cause Analysis of Shroud Band on Last Stage Blade of Low Voltage Rotor of 125 MW Set and Reconstruction

作　　者：梁金丽[1] 

机构地区：[1]嘉峪关宏晟电热有限责任公司,甘肃嘉峪关735100

出　　处：《冶金动力》2009年第5期43-46,共4页Metallurgical Power

摘　　要：介绍了某电热公司125MW机组投产以来低压转子末级叶片围带断裂的情况,分析了低压转子末级叶片围带断裂的原因及解决方案,利用机组检修机会将低压转子末级叶片改造为自带冠结构型式,彻底解决了末级叶片围带断裂的问题,提高了机组运行的安全性及经济性。The breaking state of shroud band on the last stage blade of low voltage rotor of a electrothermal Co since commissioning of 125 MW set is presented.The breaking causes of the shroud band and the solving plans are analyzed.During overhaul of the set,the last stage blade was reconstructed to the structure with shroud,which thoroughly solved the breaking issue of the shroud band and improved running safety and economy of the set.

关 键 词：叶片 围带 断裂 自带冠结构 

分 类 号：TK26[动力工程及工程热物理—动力机械及工程]