Research on Vibrating Machine Rolling Bearing Multi-Point Pitting Corrosion Fault Diagnosis

Aiming at the discrimination problem of the multi-point pitting corrosion fault for the vibrating machine rolling bearing, the vibration model of the multi-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 multi-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 multi-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.