| 摘要 |
PROBLEM TO BE SOLVED: To accurately diagnose existence of abnormalities and specify the part of the abnormalities, in rotation components and sliding components that are incorporated in a machinery and equipment. SOLUTION: Vibration generated during operation from a rolling bearing 11 of the machine facility 10 is detected by an acceleration sensor 12, is transmitted to a signal processor 21 and is converted into a digital signal, and then the level of a frequency spectrum is determined by performing envelope analysis and frequency analysis. Abnormal frequency of the vibration resulting from the abnormal part of the rolling bearing 11 is calculated, based on a predetermined relational expression, and the level of the frequency spectrum corresponding to the abnormal frequency is extracted. The extracted level of the frequency spectrum is compared and collated with a threshold which is set individually for each of the frequency of the fundamental wave and the harmonics of the abnormal frequency, and by determining each magnitude, thereby diagnosing the existence of the abnormality and the abnormal part. COPYRIGHT: (C)2009,JPO&INPIT
|
