引风机叶片断裂故障处理
董志强1,金立梅1,杨祖旺1,刘登满2,谭厚章3,周静3,杨笑甜3
(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)
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87 MPa,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%。
关键词:风机叶片;叶片断裂;有限元分析;风机振动
中图分类号:TK228            文献标志码:B            doi:10.3969/j.issn.1006-0316.2023.09.010
文章编号:1006-0316 (2023) 09-0066-09
Fault Treatment of Induced Draft Fan Blade Fracture
DONG Zhiqiang1,JIN Limei1,YANG Zuwang1,LIU Dengman2,TAN Houzhang3,ZHOU Jing3,YANG Xiaotian3
( 1.Xi 'an Green Power Technology Limited Co., Ltd., Xi 'an 710043, China; 2. CLP Shentou Power Generation Co., Ltd., Shuozhou 036002, China; 3.MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi 'an Jiaotong University, Xi 'an 710043, China )
Abstract: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).
Key words:fan blade;blade fracture;finite elementanalysis;fan vibration
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收稿日期:2022-12-15
作者简介:董志强(1976-),男,山西平定人,工程师、高级技师,主要从事电厂锅炉检修及设备管理工作,E-mail:nzgdzq@163.com。


 

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