Mechanism Analysis and Treatment of Blade Passing Frequency Vibration for Axial Induced Draft Fans in Power Plant

doi:10.11930/j.issn.1004-9649.201811102

Abstract

Abstract: Based on extensive investigation and literature review, this paper systematically explored the blade passing frequency problem in the axial induced draft fans with the vibration amplitude exceeding the related standards, which has occurred widely in coal-fired power plants after the environmental transformation project implemented. Through the studies on a typical case in a domestic plant, the internal mechanism and treatment processes are analyzed in details. The study result shows that blade tip clearance evenness, casing roundness, blade synchronicity, blade shape consistency, impeller balance, and export flue forms all contribute to this vibration. At last, the treatment plan corresponding to the various causes of the vibration are put forward respectively. The research results and management experience presented are applicable to the blade passing frequency vibration treatment for axial induced draft fans in power plants.

Key words: coal-fired power plant, fan vibration, blade passing frequency, axial induced draft fan

CLC Number:

TK14

XU Jian, XIA Xiaofei, LI Kailun, ZHENG Jin, WANG Xing, MA Xiang. Mechanism Analysis and Treatment of Blade Passing Frequency Vibration for Axial Induced Draft Fans in Power Plant[J]. Electric Power, 2019, 52(7): 117-122.

Add to citation manager EndNote|Ris|BibTeX

URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201811102

https://www.electricpower.com.cn/EN/Y2019/V52/I7/117

References

[1] 施维新, 石静波. 汽轮机发电机组振动及事故[M]. 北京:中国电力出版社, 2008:155−161.
[2] 寇胜利. 汽轮发电机组的振动及现场动平衡[M]. 北京:中国电力出版社, 2007:21−211.
[3] 张学延, 张卫军, 葛祥, 等. 电厂旋转机械设备振动问题处理案例分析[J]. 中国电力, 2015, 48(8):110-115, 120 ZHANG Xueyan, ZHANG Weijun, GE Xiang, et al. Case study on trouble-shooting of rotating machinery vibration problems in power plants[J]. Electric Power, 2015, 48(8):110-115, 120
[4] 赵洪山, 高夺, 张健平. 风机齿轮箱振动信号的稀疏傅里叶变换分析[J]. 中国电力, 2016, 49(8):69-73, 98 ZHAO Hongshan, GAO Duo, ZHANG Jianping. Analysis of Sparse Fourier Transform for vibration signal of wind turbine gearbox[J]. Electric Power, 2016, 49(8):69-73, 98
[5] 陈敏生. 动静结合可调轴流风机高倍频振动特性分析[J]. 中国电力, 2013, 46(11):119-125 CHEN Minsheng. Analysis on the high-frequency vibration characteristics of static and dynamic adjustable axial fan[J]. Electric Power, 2013, 46(11):119-125
[6] 梁勇. 大型增压风机振动的频谱特性及处理[J]. 中国电力, 2012, 45(8):45-48 LIANG Yong. Frequency spectrum and treatment for vibration of large booster fans[J]. Electric Power, 2012, 45(8):45-48
[7] 杨璋, 王合旭, 蒋彦龙. 某核电厂风冷器对称排列子风机共振特性[J]. 热能动力工程, 2016, 31(8):64-68 YANG Zhang, WANG Hexu, JIANG Yanlong. Resonance character of wind-cooler's sub-fans symmetrically arranged in a nuclear power station[J]. Journal of Engineering for Thermal Energy and Power, 2016, 31(8):64-68
[8] 黄铭其, 张大巍, 李思远, 等. 某电厂引风机基础共振问题的研究[J]. 工业建筑, 2018, 48(增刊1):256−261. HUANG Mingqi, ZHANG Dawei, LI Siyuan, et al. The research of induced draft fan base resonance problem of a certain power plant[J]. Industrial Construction, 2018, 48(S1):256−261.
[9] 陈安华, 刘德顺. 旋转机械的超谐波共振分析[J]. 湘潭矿业学院学报, 2000, 15(4):12-16 CHEN Anhua, LIU Deshun. Superharmonic resonance analysis of rotating machines[J]. Journal of Xiangtan Mining Institute, 2000, 15(4):12-16
[10] 刘家钰. 风机改造中常见问题的解决措施[J]. 热力发电, 2012, 41(6):38-40 LIU Jiayu. Solution measures for wind-snatching shaft vibration occurred easily in retrofit of air fans[J]. Thermal Power Generation, 2012, 41(6):38-40
[11] 吴斌. 旋转机械易损关键零部件故障诊断方法研究[D]. 大连:大连理工大学, 2012.
[12] 马大猷. 噪声与振动控制手册[M]. 北京:机械工业出版社, 2002:1−100.
[13] 商景泰. 通风机手册[M]. 北京:机械工业出版社, 1994:296−323.
[14] 郑金. 华能铜川电厂NO.1机组引风机节能及失速诊断试验和改造方案可行性研究报告[R]. 西安:西安热工研究院有限公司, 2015:7−12.
[15] 段学友, 周婧. 330 MW火电机组立式凝结水泵振动大故障分析处理[J]. 电站系统工程, 2013, 29(4):48-51 DUAN Xueyou, ZHOU Jing. Vibration analysis and treatment of 330 MW unit vertical condensate pump[J]. Power System Engineering, 2013, 29(4):48-51
[16] 王闯, 李凌均, 陈宏. 基于频谱频段的旋转机械运行状态评价方法[J]. 机床与液压, 2011, 39(19):137-140 WANG Chuang, LI Lingjun, CHEN Hong. The condition evaluation method based on the spectrum band for rotating machinery[J]. Machine Tool & Hydraulics, 2011, 39(19):137-140