How to solve the Problem of Induction AC Motor Bearing Fever

1. High-voltage Induction AC Motor bearing heat generation phenomenon

     High-voltage motor by coupling parts of the phenomenon of heat, stop check and found that each time the coupling should be removed, need more than 8 hours, the maximum bearing temperature of 118 ℃, circulating fan bearing heat, directly caused by grinding 6 times; high temperature fan motor bearing heat caused by kiln 10 times. Each kiln is more than 12 hours, the cumulative downtime for more than 120 hours.

2. Cause analysis of high-voltage Induction AC Motor bearing heating

     (1) high-voltage Induction AC Motor bearing high temperature, suspected equipment coupling is improper adjustment of the gap, a little vibration, resulting in bearing temperature rise is too high.

     (2) the rationality of high-voltage motor design quality manufacturing quality.

     (3) bearing quality problems caused by heat, bearing clearance.

3. Solution

     In view of this phenomenon, the high-voltage Induction AC Motor cover all the unloading and found that the motor by the end of the coupling, the bearing cover has been worn by 1cm, and was wear and tear uneven, iron and iron wear is the main cause of bearing heat the reason. After testing, the front bearing and bearing sleeve difference of 4mm, the difference between the external oil side 2mm, the total difference of 6mm. Finally, with the paper mat to cover the inner cover 4mm, jacket pad 2mm, so that the effective surface of the rotor just fixed in the high-voltageInduction AC Motor stator center.

     After the implementation of the above measures, high-voltage Induction AC Motor bearing heating problem is resolved.