Therefore, impeller fracture is the most common production accident in the price of axial fans, and the damage of the fan bearings will lead to the stator shell holding the rotor, which will have a huge impact on the fixation of the stator shell, resulting in the overall shedding of the axial fan. When the circuit circuit is too large, the copper wire in the line produces a thermal effect to burn out the stator or rotor, causing huge damage to the motor, and the lack of grease leads to dry grinding of the components in the fan, and finally the bearings, rotors, etc. are locked to death. Therefore, in daily maintenance, we should pay attention to increasing the grease.