风机振动故障诊断及处理

Diagnosis of Fan Vibration-caused Failures and Measures taken to Cope with Them

采用CSl2120双通道振动采集仪对山东临沂某电厂风机、电动机的振动频谱及相位数据进行收集,在此基础上对故障进行了诊断分析,找出风机产生振动的原因是电动机与风机之间的齿型联轴器存在断齿、裂纹和齿面凹坑情况,且联轴器裂纹是引起振动幅值随负荷显著变化的根本原因。依据该诊断结论进行了处理,取得显著效果。该风机的振动特征及处理过程具有代表性。给出分析、诊断的思路和处理方法,可以为类似风机的振动诊断和处理提供参考。

A model CS12120 dual-channel vibration frequency acquisition device was used to collect the vibration frequency spectrums and phase data of blower fans and electromotors at a power plant in Linyi City of Shandong Province.On this basis a diagnosis and analysis was performed of the vibration-caused failures.The cause of fan vibrations can be attributed to tooth breakage,cracks and tooth face cave-in in a toothed coupling located between an electromotor and a blower fan.Moreover,the fractures in the coupling have been a root cause leading to a significant variation in vibration amplitudes concurrent with load changes.Corrective measures were taken based on the above diagnostic conclusion and remarkably good results have been achieved.The vibration characteristics and the method adopted to cope with them are quite representative.The analysis,diagnostic approach and method used to deal with failures can serve as a helpful reference for diagnosing and resolving similar fan vibration problems.