Condition monitoring and diagnostics of rolling bearings of high-voltage electric motors during their operation

During the operation of high-voltage motors at hazardous industries, it has been proved that, bearings do not work out the operating time assigned by the manufacturer. The report covers issues on the condition monitoring and diagnostics of the defects in rolling bearings of a high-voltage motors during theirs operation, defines the causes of a premature emergence and development of the defects as well the measures worked out for ensuring safe and prolonged operation of the rolling bearings of high-voltage motors.

The collection and analysis of vibration parameters of electric motors during their operation is performed by means of the real-time condition monitoring system. A spectral matrix of defects frequencies has been developed on the basis of the analysis of rolling bearings vibration source. The spectral analysis of vibration parameters showed the presence of frequency components that reveal defects of the bearings. As a result of vibration analysis, a number of defects in the rolling bearings have been revealed and proved during the motor repair and inspection of its bearings for likely defects.

The condition monitoring and diagnostics of the rolling bearings during the operation of the electric motors have allowed:

• timely decommissioning of the motor with the damaged bearings as well as prevention of accidents which may have occurred with the unit that dispenses fire explosive products;
• detection of the principal cause of frequent failures of the rolling bearings, which is application of the bearings in inappropriate working conditions and non-fulfillment of auxiliary measures recommended by manufacturers of bearings to prolong lifetime of the equipment;
• submitting of recommendations on use of the bearings in the motor.

Kostyukov V.N., Tarasov E.V. Condition monitoring and diagnostics of rolling bearings of high-voltage electric motors during their operation // Condition Monitoring and Diagnostic Engineering Management (COMADEM-2011), pp. 824-833

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