引风机叶片断裂故障处理  

Fault Treatment of Induced Draft Fan Blade Fracture

作　　者：董志强 金立梅 杨祖旺 刘登满 谭厚章[3] 周静[3] 杨笑甜 DONG Zhiqiang;JIN Limei;YANG Zuwang;LIU Dengman;TAN Houzhang;ZHOU Jing;YANG Xiaotian(Xi'an Green Power Technology Limited Co.,Ltd.,Xi'an 710043,China;CLP Shentou Power Generation Co.,Ltd.,Shuozhou 036002,China;MOE Key Laboratory of Thermo-Fluid Science and Engineering,Xi'an Jiaotong University,Xi'an 710043,China)

机构地区：[1]西安格瑞电力科技有限公司,陕西西安710043 [2]中电神头发电有限公司,山西朔州036002 [3]西安交通大学热流科学与工程教育部重点实验室,陕西西安710043

出　　处：《机械》2023年第9期66-74,共9页Machinery

摘　　要：某电厂对#1机组(600 MW)进行烟气超低排放改造,改造后引风机在运行中多次出现叶片断裂事故,为分析其断裂原因并进一步改进设计,本项目进行了现场对比试验与三维有限元模型分析,诊断结果为叶型设计不合理造成的应力集中,并提出了优化改造方案,最终确定的优化方案最大应力值为87MPa,比三维有限元分析(网格3)计算的最大应力值(311 MPa)下降了72%。After the ultra-low flue gas emission transformation for unit#1(600 MW)of a power plant,the blade fracture accident occurred several times during the operation of the induced draft fan.In order to analyze the cause of the fracture and further improve the design,this project has carried out the comparative field test and the three-dimensional finite element model analysis,and the cause is diagnosed as the stress concentration due to improperly designed blade shape,and the optimization plan is put forward correspondingly.The maximum stress of the final optimization plan is 87 MPa,which is 72%lower than the maximum stress(311 MPa)calculated by the three-dimensional finite element analysis(grid 3).

关 键 词：风机叶片 叶片断裂 有限元分析 风机振动 

分 类 号：TK228[动力工程及工程热物理—动力机械及工程]