200MW汽轮机末级叶片断裂原因及裂纹扩展寿命的估算  

The Breakage Causes and the Estimation of Break Extensionand Residue Life for Last Stage Blades of 200 MW Turbine

作　　者：郑福民[1] 于维成[2] 杨振国[2] 

机构地区：[1]辽宁电力科学研究院,辽宁沈阳110006 [2]中国科学院金属研究所,辽宁沈阳110015

出　　处：《东北电力技术》2002年第8期1-5,共5页Northeast Electric Power Technology

摘　　要：对清河电厂 2 0 0MW汽轮机末级叶片断裂原因进行分析 ,同时通过疲劳裂纹扩展试验及力学分析估算了形成 0 8mm初始裂纹源的剩余寿命约为 12 75h。该结果对汽轮机末级叶片的运行。The breakage causes of last stage blades are analysed for 200 MW turbine of Qinghe Power Plant.Meantime,through the test of fatique break extension and the mechanics analysis,it was estimated that,the residue life forming 0 8 mm initial break source will be about 1 275 h.This result provides a important basis of operation,monitoring and amending the time of maintenance for the last stage blades of turbine.

关 键 词：200MW汽轮机 末级叶片 断裂原因 裂纹扩展寿命 估算 

分 类 号：TK263.3[动力工程及工程热物理—动力机械及工程]