Date: 2013-08-20

LNSERTED bearing fault diagnosis method of vibration analysis

A, with spherical bearings early evaluation
1, to the pump motor diagnostics
I plant 6 # to replace the pump motor in the maintenance of a new bearing, put into operation in motor heating (78 or so), believed to be of substandard quality bearings, ready to repair. After testing and analyzing vibration spectrum, due to vibration velocity is very small, can be determined bearing no quality problems, but bearing clearance is small, fever is a temporary phenomenon, can be used. After long-term operation, confirming bearing well-functioning, with no heating phenomenon.
2, the boiler mill motor diagnostics
3,5 # boiler replacement ball bearing motor repair after excessive vibration, and there is abnormal sound, tested analysis can be seen bearing fault frequencies and their harmonics caused by noise vibration velocity exceeds the standard value, belonging to poor quality bearing. After passing the bearing replacement device is working properly.
B, deterioration of detection
When the vibration when the speed exceeds 3mms, such as spectral analysis and found to comply with spherical bearing fault feature, you need to strengthen the monitoring of the bearing, so that timely treatment, to avoid upgrade failure.
From the spectrum seen bearing fault frequencies and their harmonics generated noise is more obvious, is bearing deterioration, the need to strengthen the monitoring and timely treatment.
When the vibration speed exceeds 7mms time (15 ~ 300kW rotating equipment) to promptly replace the bearings to avoid equipment accidents.
For accurate diagnosis of the damaged parts of the bearing can be used as vibration analysis software through 904 experts put forward specific diagnostic report.

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