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2024-05-20
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1 设备概述
K7风机服役已7年，双支撑、皮带驱动，运行方式为常开、变频控制，常态运行下电机转速1780RPM、功率75千瓦。共新增4支传感器，现场安装情况如下：
2 故障描述
2023年9月4日昆英信息完成K7风机健康监测与智能诊断系统硬件安装，进入调试环节，在系统完成配置后，电机驱动端当即出现振动报警，随后调试人员对系统进行了为期2天的观察，期间数据稳定，2天后系统具体数值和趋势见图1、图2。
为确保数据准确、可信，调试人员先后于2023年9月7日和9月15日两次进入风机柜用点检仪进行了测量，与智能诊断系统数据进行比对，结果显示数据基本吻合，电机驱动端的确存在振动超标现象。
图1 系统首次报警
图2 波形与趋势图
3 诊断结论
2023年9月18日智能诊断功能上线，结论显示电机驱动端存在轴承故障和不平衡问题。如图3、图4：
图3 报警及故障结论
图4 故障诊断报告
经技术人员确认，数据和结论的可信度极高，建议车间择机检修。
2023年9月23日，车间对电机进行了维修，拆解显示电机轴承内圈端面的确存在明显异常磨损和干结（润滑不良），如图5，与系统诊断结论吻合。维修人员当即更换了轴承。
图5 故障轴承
4 效果验证及故障根除
轴承更换后，振动数据趋势呈现明显下降，恢复至正常水平，如图6所示。
目前K7风机电机驱动端运行情况
1.加速度从33.5m/s2降到了6.5m/s2，无冲击信号；
2加速度包络值：从11gE降到了1.2gE，无轴承故障信号；
3.速度值（反应总体能量）没有明显变化，仍然存在1X的工频成分，主要可能性是不平衡、皮带轮偏心或轴弯。该作用力在风机输入端也存在。长期运行，仍会影响轴承寿命。
建议如下
1、清洗检查更换的故障轴承，观察损伤情况。
2、检查皮带松紧是否合适，皮带轮是否偏心，现场确认振动速度是否超标。
3、根据维修人员的经验,排查不平衡力的来源，做根源性问题解决。
来源：昆英信息
（版权归原作者或机构所有）
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Hangzhou Jingzhou Bearing Co.,Ltd.
Address：Liangzhu Indystrial City Hangzhou
Service hotline：0571-88777186 88777665
Jiangsu Jingzhou Bearing Co., Ltd.
Address：No.19, Yulan Avenue, Xuyi Economic DevelopmentZone, Huai’an City, Jiangsu Province
Service hotline：0517-80817777
Website：www.jzbearing.com
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