Method and device for monitoring bearing failure of power generator

A generator bearing and fault monitoring technology, applied in the direction of mechanical bearing testing, etc., can solve the problems of difficult measurement, unsatisfactory effect, and inability to accurately reflect the bearing operation status, and achieve the effect of accurate, effective and monitoring.
CN102478459AActive Publication Date: 2012-05-30SHANGHAI DONGHAO TEST TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI DONGHAO TEST TECH
Publication Date
2012-05-30

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Abstract

The invention relates to a method for monitoring bearing failure of a power generator. The method comprises providing a power generator including a rotor and a stator; installing a measuring member on one of the rotor and stator while installing an eddy current sensor on the other, with the measuring member and the eddy current sensor opposite to each other during rotor rotation process; allowing the eddy current sensor to generate different eddy current output signals according to its distance with the measuring member; and monitoring position relation between the rotor and stator according to the output signals so as to determine running state of the bearing. The invention also provides a monitoring device for realizing the above method. The invention can effectively and precisely monitor running state of the bearing of the power generator.
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Description

【Technical field】

[0001] The invention relates to a method and device for monitoring faults of generator bearings. 【Background technique】

[0002] The generator is composed of stator, rotor, bearing and other main components. It is a rotating mechanical equipment. The bearing (especially the front bearing) is a vulnerable part. It is necessary to use certain monitoring methods to grasp the state of the bearing during operation, so as to ensure the generator set. safe operation.

[0003] At present, the industry generally adopts the vibration measurement method of the acceleration (or speed) sensor commonly used in ordinary rotating machinery to identify the bearing fault of the wind turbine. However, although wind turbines are rotating machinery, their low-speed and heavy-load characteristics are significantly different from ordinary rotating machinery. Vibration and shock are no longer the main characteristics of their operating failures. Therefore, acceleration and speed ...

Claims

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