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S21 Vibrações e Análise Modal |
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Title:
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HIGH FREQUENCYS BAND SELECTION TO ANALYSE ROLLER BEARING DEFECTS
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Summary :
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ABSTRACT. ROTARY MACHINES OPERATION CONDITION MONITORING IS A INDISPENSABLE ACTION TO DETECT THEIR FAULTS. THE HIGH FREQUENCY BAND ANALYSIS TECHNIQUE HAS BEEN EFFICIENTLY USED TO DETECT INCIPIENT FAULTS OF ROLLER BEARINGS, BY USING THE ENVELOPS OF IT S VIBRATION SIGNAL. TO IMPROVE THE FAULT INDENTIFICATION IT IS NECESSARY TO CHOOSE WICH FREQUENCY IS MORE SENSITIVE TO THE BEARING DEFECTS. THIS PAPER PROPOSES THE USE OF THE MECHANICAL SYSTEM S FREQUENCY RESPONSE FUNCTION TO SELECT THE MOST SENSITIVE FREQUENCY BANDS. EXPERIMENTAL TESTS ARE CONDUCTED USING A RIGID BALL BEARING WITH A DEFECT INTRODUCED ON IT S OUTER RACE. THE RESULTS OBTAINED IN SLELECTED FREQUENCY BANDS ARE COMPARED, TO IDENTIFY THE IMPULSES GENERATED BY THE BEARING FAULTS.
KEYWORDS: CHARACTERISTIC FREQUENCY, HIGH FREQUENCY BAND, ENVELOP
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Author :
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Bovi, Hemerson 0
Lépore Neto, Francisco Paulo
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Paper View :
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