Anomaly detection method of a rotating mechanical system, the abnormality detection method rotating machine system abnormality monitoring method of using, and the rotational mechanical system of the abnormality monitoring device using the abnormality monitoring method

摘要

An object of the present invention is to provide an abnormality monitoring device using a rotary machine system abnormality detection method of based on the running time of the current signal of the three-phase induction motor, abnormality monitoring method using the abnormality detection method, and the abnormality monitoring methodThe A rotary mechanical system abnormality detection method, a first step of performing a fast Fourier transform operation upon the current signal of the three-phase induction motor 12, from the obtained current spectrum, a current spectral peak of the power supply frequency the center, to extract the sideband of the current spectrum peak of only characteristic frequency fraction abnormally related rotation mechanical system 11 low-frequency side and the power frequency that is present in the frequency position away respectively to the high-frequency side, one of the sidebands a second step of determining one or both of the current spectrum peak, a third step of calculating a deterioration parameter of the rotating machine system 11 from a current spectrum peak value of the sidebands and the power supply frequency, deterioration records the value of the degradation parameter performing simple diagnosis and a fourth step of detecting the abnormality of the rotary mechanical system 11 by comparing the criterion valueFIELD 5