介绍了基于共振解调技术的滚动轴承故障诊断原理及方法,并研究了煤矿通风机典型故障的轴承特性振动频率。通过采集振动信号和频谱分析,有效、可靠地诊断出某矿通风机轴承的故障、类型和部位,及早发现了故障,避免了事故进一步恶化的危险。案例分析证明了共振解调技术在滚动轴承故障诊断中的可行性。 The principle and method of fault diagnosis of rolling bearing based on resonance demodulation technology are introduced. And the vibration characteristic of bearing characteristic of typical failure of coal mine ventilator is studied. By collecting vibration signals and spectrum analysis, the failure, type and location of a mine fan bearing can be effectively and reliably diagnosed. Faults can be detected early and the danger of further deterioration of the accident can be avoided. Case studies demonstrate the feasibility of resonance demodulation in fault diagnosis of rolling bearings.