轴承故障诊断中共振解调技术的应用研究

Study on Application of Resonance-demodulation Technology in Rolling Bearing Fault Diagnosis

为解决机械设备滚动轴承的早期故障难于识别的问题,采用共振解调技术对此类故障对应的微冲击脉冲进行了提取研究．分别采用频谱分析、软件及硬件共振解调的方法对滚动轴承的外圈点蚀故障信号进行了分析．结果表明,共振解调技术能提取早期故障的微冲击特征,相对软件共振解调,硬件共振解调谱图故障特征明显,能对轴承早期裂纹、点蚀等微冲击故障进行有效提取．

Resonance-demodulation technology has been studied to detect the micro shock pulses induced by the early fault of rolling bearings. The spectrum analysis, and the software and hardware resonance demodulation technology have been adopted separately to analyze the pitting fault on the outer ring of rolling bearing. The results have indicated that, the resonance demodulation technology can detect the fault features of early micro shock pulses, and the fault features detected by the hardware resonance demodulation technology are more accurate than the software resonance demodulation, and the hardware resonance demodulation technology is a effective method to detect the early cracking and pitting fault features of rolling bearings.