振动机械滚动轴承两点点蚀故障诊断研究

针对振动机械滚动轴承两点点蚀故障的判别问题，建立了基于Hertz接触理论的振动机械滚动轴承内环和外环两点点蚀故障的振动模型，提出了两点点蚀故障的判别依据，对理论模型进行了仿真，并在振动筛上进行了试验研究。理论分析与试验分析结果一致表明，振动机械与旋转机械滚动轴承两点点蚀的故障特征频谱有明显的区别。振动机械滚动轴承外环点蚀故障时有明显的振幅调制现象，而理想的旋转机械外环点蚀无振幅调制现象；振动机械滚动轴承内环点蚀故障时有轻微的振幅调制现象，而理想的旋转机械内环点蚀存在明显的振幅调制现象。

Research on Vibrating Machine Rolling Bearing Double-point Pitting Corrosion Fault Diagnosis

Aiming at the discrimination problem of the double-point pitting corrosion fault for the vibrating machine rolling bearing, the vibration model of the double-point pitting corrosion fault was built for the vibrating machine rolling bearing with inner ring and outer ring based on Hertz contact theory and the discrimination criterion of the double-point pitting corrosion fault was proposed. At the same time, the theoretical model was simulated and the experiment was finished in the vibrating sieve. The experiment results are consistent with the theoretical analysis results. The results show that there is the obvious difference from the fault characteristic spectrum of the rolling bearing double-point pitting corrosion for the vibrating machine and the rotating machinery. There is an obvious amplitude modulation phenomenon for the outer ring pitting corrosion fault of the vibrating machine rolling bearing, but there is not the amplitude modulation phenomenon for the outer ring pitting corrosion fault of the ideal rotating machinery rolling bearing. There is a slight amplitude modulation phenomenon for the inner ring pitting corrosion fault of the vibrating machine rolling bearing and but there is the obvious amplitude modulation phenomenon for the inner ring pitting corrosion fault of the ideal rotating machinery rolling bearing.