Because the reducing and sizing block shift gear bearings are installed in the gear

the operating conditions of bearing are unable to be directly detected.Through analyzing the spectrum of the reducing and sizing block B-box shift gear

combined with comparing the spectrum of before and after the fault

and the spectrum of the fault feature of shifting gears is analyzed in detail.Through the eccentric fault frequency of shift gears

the damage of the shift gear bearing is confirmed

it is better for the equipment maintenance persons to grasp and apply online vibration monitoring system to justify the level and the developing trend of the failure of bearings.Then

it is helpful for the equipment maintenance persons to predict the time of repair and tap the potential of equipments.