Rolling bearing abnormality detection device and rolling bearing abnormality detection method
AssigneeKabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
InventorsKeita KANAI, Toru OKADA, Kazuo YAMAGUCHI
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Abstract
A bearing abnormality detection device and a bearing abnormality detection method in the present invention include: obtaining a frequency spectrum of vibration data of a vibration in a rolling bearing; detecting, from the obtained frequency spectrum, a peak frequency within a predetermined frequency range including a theoretical frequency showing a peak on the frequency spectrum in an occurrence of an abnormality; and determining whether an abnormality is present on the basis of a chronological frequency change amount that is a difference between a preset reference frequency being a reference of the peak frequency and the detected peak frequency.
Claims7
A rolling bearing abnormality detection device, comprising:
- a vibration detection part that detects a vibration in a rolling bearing as vibration data;
- a spectrum processing part that obtains a frequency spectrum of the vibration data detected by the vibration detection part;
- a peak frequency detection part that detects, from the frequency spectrum obtained by the spectrum processing part, a peak frequency that is a frequency showing a peak within a predetermined frequency range including a theoretical frequency showing a peak on the frequency spectrum in an occurrence of an abnormality;
- a frequency change amount processing part that obtains a chronological frequency change amount that is a difference between a preset reference frequency being a reference of the peak frequency and the peak frequency detected by the peak frequency detection part;
- and
- an abnormality determination part that determines, on the basis of the chronological frequency change amount obtained by the frequency change amount processing part, whether an abnormality is present in the rolling bearing.
A rolling bearing abnormality detection method, comprising:
- a vibration detection step of detecting a vibration in a rolling bearing as vibration data;
- a spectrum processing step of obtaining a frequency spectrum of the vibration data detected in the vibration detection step;
- a peak frequency detection step of detecting, from the frequency spectrum obtained in the spectrum processing step, a peak frequency that is a frequency showing a peak within a predetermined frequency range including a theoretical frequency showing a peak on the frequency spectrum in an occurrence of an abnormality;
- a frequency change amount processing step of obtaining a chronological frequency change amount that is a difference between a preset reference frequency being a reference of the peak frequency and the peak frequency detected in the peak frequency detection step;
- and
- an abnormality determination step of determining, on the basis of the chronological frequency change amount obtained in the frequency change amount processing step, whether an abnormality is present in the rolling bearing.
Dependencies are inferred from the claim text.