Evolution process and dynamic response analysis of gear fatigue pitting

Through the gear contact fatigue test-bed, the evolution process of gear fatigue pitting phenomenon and the vibration response characteristics of the system in the process are studied. The results show that the gear fatigue pitting phenomenon is the evolution process of the gear surface through running in, wear, local gray spot belt, extensible gray spot belt, initial pitting trace, obvious pitting belt and other characteristics one by one, which is formed by the micro features of the gear surface It is random, but at the same time, it can not avoid the cumulative damage process.

The amplitude effect of dynamic response caused by fatigue pitting can be more than twice of that without pitting, which effectively promotes the reference of alarm value set by the system during real-time monitoring of the test, realizes the earlier identification of pitting characteristics, and paves the way for the later fault diagnosis and identification of gearbox.