Explosion-proof motors hold the shaft phenomenon of the reasons

1 Explosion-proof motor bearing failure itself
Due to the heat affected by the explosion-proof motor bearings will fail. Explosion-proof motor bearings in a good state of lubrication can be very good operation, and explosion-proof motor bearings for can directly overall damage.
2 Explosion-proof motor bearing lubrication
Explosion-proof motor grease filling is very convenient, the temperature resistance of the grease (-10 ~ 130 ℃), can meet the explosion-proof motor bearing lubrication requirements.
3 Explosion-proof motor bearing gland and journal radial friction
From the explosion-proof motor bearing gland and journal radial clearance analysis, explosion-proof motor according to national standards, must ensure that the explosion-proof motor in the event of an internal electrical spark, through the stop seals, the movement of the part of the gap to the outside of the cooling effect, to ensure that the motor does not ignite the outside of the flammable and explosive media.
4 Explosion-proof motor rotor vibration
Explosion-proof motor shaft bending will cause changes in bearing gland and fit journal clearance, and rotor bending and not dynamic balancing caused by the motor rotor vibration increase in operation, rotor bending caused by clearance reduction and vibration displacement, the role of the fit clearance failure is mutual.

Explosion-proof motor holding shaft failure measures:
Failure of explosion-proof motor dismantling and inspection and reference to similar fault repair technical data analysis to see, the motor bearing shaft failure by the gland and rotor journal friction with each other and heat, bringing high temperature failure of the bearing grease, bearings running in a poorly lubricated state, bearing wear and tear caused by the gland and rotor journal friction with each other to become more serious, ultimately resulting in the bearing gland and the journal of high temperature bonded together, resulting in motor overload Protection jump.
Strictly control the dimensional tolerances of the end capseat holes and bearing mating journals. Regular maintenance of explosion-proof motor bearings, long-term lubrication of explosion-proof motor.