| 摘要 |
PURPOSE:To prevent a rotary machine from damaging by providing a signal transmitting means which sends the output signal of a vibration detector to a stationary part and a signal processing means which generates an alarm signal when the signal transmitted by the signal transmitting means exceeds a set value. CONSTITUTION:A detection signal processing part 17a converts a vibration acceleration signal which is detected 9 into a speed signal and a displacement signal, which are displayed 17b. One signal after the processing 17a is supplied to a data recorder 17d through a discriminator 17c and the vibration acceleration signal which exceeds a set value is recorded 17d automatically. Another signal after the processing 17a is supplied to an arithmetic processing part 17e and information on the arithmetic result is inputted to an abnormality diagnostic part 17f and a comparing decision device 17g. The diagnostic part 17f compares various pieces of information of a rotating shaft 6 based upon the safety of each operations state which is stored 17h previously on an interactive basis through the decision device 17g to diagnose the cause of vibrations, so that an abnormal diagnostic result is stored 17i. A computing element 17j adds the load on a thrust bearing to data after processing 17e to decide the danger of the thrust bearing, and generates an alarm 17k when the bearing is in a dangerous state.
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