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October 2nd, 2014, 09:54 PM   #1
Junior Member
Joined: Oct 2014
From: aaa

Posts: 1
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I Ride:
High voltage motor bearing burning accident

Row of powder machine is equipped with thermal power plant, the motor power of 220 kw, voltage is 6
Kv. Motor shaft extension end use 2322 e cylindrical roller bearing, the shaft extension 6322 deep groove ball bearings. In 2004, the operation of the motor shaft extension end bearing temperature rise sharply, the color of the oil bearing cover, accompanied by anxious burnt flavour of smoke. Operator on duty after downtime inspection found that the motor shaft extension end bearing burning, rotor, in the death of the motor.
1 accident investigation after the accident, the maintenance personnel to the motor strip inspection, found that: (1) combustion motor shaft extension end bearing, bearing frame, roller badly worn, fall off, bearing outer ring local blue;
(2) bearing chamber has obvious traces of wear, with deep crack; (3) the rotor shaft of the internal and external oil cover knot, how deep grinding crack; (4) the motor shaft extension Clearance Of SKF Bearing end bearing inner and outer cover to burn oil.
After the collapse of check, check motor maintenance records, found that change the motor bearings on both ends, two years ago. Replacement of bearings, motor shaft extension end bearing and bearing housing tolerance matching problem, bearing a slight cylindrical phenomenon, but not for processing. After replacement of bearing, motor only added in February 2004, in addition, there is no repair history.
2 cause analysis (1) maintenance personnel continue to cylindrical bearing defects, lead to a fever, after burning bearing in the long run. (2) maintenance personnel failed to come on auto maintenance.
According to the requirement of the specification, gas cycle 2, increased by 000
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