浙江电力

2018, v.37;No.271(11) 114-118

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激光熔覆修复轴颈引起的轴振信号畸变分析与诊断
Analysis and Diagnosis on Signal Distortion of Shaft Vibration Due to Journal Restoration by Laser Cladding

韩兵,钱荣财,吾明良,郭进文,余化文
HAN Bing,QIAN Rongcai,WU Mingliang,GUO Jinwen,YU Huawen

摘要(Abstract):

介绍了某汽轮机损伤转子修复后,在机组带负荷过程中出现的轴振异常爬升现象,通过对故障现象及数据的分析排除了动静碰磨的可能,结合激光熔覆的技术特点及涡流传感器的工作原理,分析认为是由激光熔覆导致了涡流感应磁场的畸变,致使测量信号失真。更换为以瓦振作为振动的主要监测点后,机组安全稳定运行,未发生振动故障。
This paper introduces shaft vibration increase during onload operation of the unit after the damaged steam turbine rotor was restored. By analysis of the fault and data, the possibility of stator and rotor abrasion is excluded. By analysis on technical characteristics of laser cladding and operation principle of eddy current sensor, the paper believes that the laser cladding resulted in distortion of eddy current induced magnetic field that caused signal distortion. After the main monitoring point of vibration is changed into bearing vibration,unit operation safety and stability are guaranteed and no vibration fault occur any more.

关键词(KeyWords): 转子;激光熔覆;涡流感应;轴振;信号畸变
rotor;laser cladding;eddy current induction;shaft vibration;signal distortion

Abstract:

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作者(Author): 韩兵,钱荣财,吾明良,郭进文,余化文
HAN Bing,QIAN Rongcai,WU Mingliang,GUO Jinwen,YU Huawen

DOI: 10.19585/j.zjdl.201811020

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