| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an abnormality diagnosing device, for diagnosing an abnormality which may occur in a screw compressor when the abnormality is very small, and diagnosing a position where the abnormality occurs. <P>SOLUTION: The abnormality diagnosing device comprises: a sensor 2 detecting a periodic phenomenon existing along with drive of the screw compressor 1; a specific frequency component intensity extraction means 6 converting periodic phenomenon data acquired by the sensor into time fluctuation data of the intensity of a first marked frequency component set from a frequency of unique periodic phenomenon at a normal time of parts to be diagnosed in which abnormality may occur; a frequency component analysis means 7 analyzing the frequency component of data acquired by the specific frequency component intensity extraction means; and an abnormality determination means 8 determining, based on the frequency analysis data, existence or nonexistence of an abnormality by comparing a preset reference value with the intensity of a second marked frequency component of the frequency analysis data set on the basis of a frequency of a periodic phenomenon existing when a predicted abnormality occurs in the parts to be diagnosed. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
