| 摘要 |
<p>Disclosed is a method for detecting damage to a bearing which comprises an inner ring, an outer ring, a rolling body which rolls while being in contact with the inner ring and the outer ring, and a holder for holding the rolling body, wherein, vibration of the bearing is measured by a sensor while the movable side of the inner ring or the outer ring is rotating, a vibration waveform of the bearing obtained by the measurement by the sensor is subjected to frequency analysis, whether the bearing is damaged is determined on the basis of the result of the frequency analysis, wherein two or more frequency ranges are set so that the ranges do not overlap with each other and have ranges substantially equal to the rotation frequency (fr) of the movable side of the inner ring or the outer ring, peak frequencies are respectively obtained in the set plurality of frequency ranges, the difference between the obtained peak frequencies is compared with the value obtained by k-times the rotation frequency (fr) (k is an integer of 1 or more) to determine whether both compared values can be deemed as a match or not, and if both compared values are deemed to match, the bearing is judged as damaged.</p> |
