whenThree-phase asynchronous motor Bearing overheating, motor overheating when we should do, today to analyze these two reasons:
Note: If the motor fails, please be sure to be handled by technical personnel, strict non-technical personnel privately, otherwise it may cause personal and property losses.
one. Bearing overheating
1. Fault cause analysis
①Too much or too little grease
②The oil is bad and contains impurities
③Improper fit of bearing to shaft diameter or end cap (too loose or too tight)
④The bearing inner hole is eccentric, rubbing with the shaft
⑤Motor end cover or bearing cover is not installed flat
⑥The coupling between the motor and the load is not corrected, or the belt is too tight
⑦Bearing clearance is too large or too small
⑧Motor shaft bending
2. troubleshooting
①Greased (volumetric1/3-2/3)
②Replace clean lubricating grease
③Too loose can be repaired by binder, too tight should be applied, grinding shaft diameter or end cap inner hole, make it suitable;
④Repair bearing cap and remove rub points
⑤reassembly
⑥Recalibrate, adjust belt tension
⑦Replace bearing
⑧Correct motor shaft or replace rotor
two.
Three-phase asynchronous motor
Overheat or even smoke
1.Fault cause analysis
①The power supply voltage is too high, which greatly increases the heat of the iron core
②The power supply voltage is too low, the motor is running with rated load, and the current is too high
③When the winding is repaired and removed, the improper hot dismantling method is used, which burns the iron core
④Rotor core rub
⑤
Three-phase asynchronous motor
Overload or frequent startup
⑥Cage rotor broken bar
⑦The motor lacks phase and runs in two phases
⑧Insufficiently impregnated winding after rewinding
⑨High ambient temperature motor surface dirt, or the ventilation channel blocked
⑩Motor fan failure, poor ventilation; Stator winding fault (short circuit between phases and turns; Incorrect internal connection of stator winding)
2.troubleshooting
①Reduce the supply voltage (such as adjusting the supply transformer tap) if the motorY,△If the connection is wrong, the connection should be corrected
②Increase the supply voltage or change the thick supply wire
③Repair the core and troubleshoot
④Remove friction points
⑤Load shedding; Start control according to the specified number of times
⑥Check and troubleshoot the rotor winding
⑦Resuming three-phase operation
⑧The technology of double dipping and vacuum dipping is adopted
⑨cleanseThree-phase asynchronous motor
Change the ambient temperature and adopt cooling measures
⑩Check and repair fans and replace them if necessary; Check the stator winding and remove the fault.
Three-phase asynchronous motor
Regular maintenance and overhaul is required, which can be avoided and reduced
An accident of sudden damage.
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Mori machine
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Brand affiliation
Shengzhou Chaoli electric appliance factory
After years of accumulation of technical and service experience, timely grasp of customer needs
Mori machine
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Mori machine
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