国产200MW汽轮机叶片断裂原因分析  

Cause Analysis for Blade Rupture of 200MW Steam Turbine

作　　者：邓楠[1] 李钢 马升江[1] 

机构地区：[1]国网辽宁省电力有限公司电力科学研究院,沈阳110006 [2]国电吉林龙华长春热电一厂,长春130052

出　　处：《汽轮机技术》2016年第2期156-157,160,共3页Turbine Technology

摘　　要：某电厂200MW机组正常运行时5瓦、6瓦振动异常增大,经揭缸检查发现高压第2级动叶片断裂两片。通过对断裂叶片的化学成分、力学性能、金相组织、断口电镜扫描、同型机组运行情况及受力分析,得出叶片断裂原因是叶片安装质量不好,振动下传至叶根造成叶片断裂。When the 200MW steam turbine operated in the power plant, the vibration at pad 5 and pad 6 increased abnormally and the top-off inspection showed two moving blades of HP 2nd stage ruptured. The chemical composition analysis, mechanical property analysis, metallurgical organization examination, SEM scan of the rupture, operation of similar unit and force analysis showed the rupture was caused by vibration transferred to the blade root due to poor installation quality of the blade.

关 键 词：汽轮机 叶片 断裂 

分 类 号：TK267[动力工程及工程热物理—动力机械及工程]