一起新能源发电机组CC20型汽轮机叶片断裂故障原因分析  

Failure Analysis of a New Energy Generator Unit CC20 Steam Turbine Blade Fracture Cause

作　　者：纪贺龄 JI Heling(Beijing North Control Green Sea Energy Environmental Protection Company Limited,Beijing 100089,China)

机构地区：[1]北京北控绿海能环保有限公司,北京100089

出　　处：《吉林电力》2024年第4期51-56,共6页Jilin Electric Power

摘　　要：针对一起新能源发电汽轮机复速级叶片失效断裂故障进行强度校核和理化分析,结果表明失效的12Cr13叶片中Mn元素含量高于标准要求,导致叶片在高温工作时形成较大内应力从而引起叶片变形与开裂倾向,并且在失效叶片短弧侧下端根部台阶处尖角位置存在应力集中,两者共同作用使叶片在运行中产生早期疲劳微裂纹,在交变应力作用下加速微裂纹扩展,最终导致叶片疲劳断裂,最后提出预防和质量控制措施。For new energy power generation turbine complex speed level blade failure fracture strength analysis and physical and chemical test analysis,the results show that the failure blade grade 12Cr13 steel Mn element content is too high,can cause the blade in high temperature form large internal stress cause blade deformation and cracking tendency,and in the lower end of the root steps,the two blade in operation early fatigue micro crack,in alternating stress acceleration micro crack expansion,eventually lead to blade fatigue fracture.Finally,put forward prevention and quality control measures.

关 键 词：新能源机组 汽轮机叶片 MN元素 内应力 疲劳损伤 断裂 

分 类 号：TM311[电气工程—电机]