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
The product has been innovative and flexible, the concept of environmental protection and energy saving and motor design are integrated, and the rich product research experience is guaranteed
Mori machine
Products of high reliability and high performance have passed the EUCECertification,3CECertification and third party quality testing.
