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在振动故障的精确诊断中,同故障原因最有直接关联的即是主导频率,因此依据主导频率识别振动故障的诊断方法成为旋转机械故障诊断最为实用的方法.使用主导频率判别法进行故障诊断时,首先要明确所确定的主导频率对应于哪种可能故障,并找出区别可能故障的独特征兆参数,再结合工况参数综合诊断,便能得出比较准确的诊断结论.一、主导频率同故障类的对应关系从复杂的频谱图中确定主导频率后,需要据此判断可能故障类,进而得出诊断结论,以指导维修.由于振动频率与机器转速有密不可分的关系,因此
In the precise diagnosis of vibration faults, the most direct correlation with the cause of fault is the dominant frequency, so the diagnosis method of vibration fault based on dominant frequency becomes the most practical method for fault diagnosis of rotating machinery. When the dominant frequency discriminant method is used for fault diagnosis , We must first determine the dominant frequency of the corresponding to what kind of possible failure and identify the possible symptoms of the difference between the unique symptoms, combined with the comprehensive diagnosis of working conditions parameters, can be drawn more accurate diagnosis Conclusion. Correspondence between fault types After determining the dominant frequency from the complex spectrogram, it is necessary to determine the possible fault types and then to derive the diagnosis conclusions to guide the maintenance.As the vibration frequency and the machine speed are inextricably linked,