| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for simply diagnosing an abnormality of an acceleration deceleration type rotary machine equipment whereby a state of the machine equipment whose drive state repeats acceleration and deceleration at all times can be accurately diagnosed. SOLUTION: In the method for diagnosing with use of a measured vibration and a rotational speed signal an abnormality of an acceleration deceleration type rotary machine equipment which completes one operation from an acceleration to a deceleration and changes the number of revolutions every operation, an overall value of a measured vibration spectrum or a value at a rotational speed when a load current of a prime mover of a rotary machine is controlled is used as a diagnostic parameter. Values of the diagnostic parameter at a plurality of top speeds are collected in a state where the top speeds measured with the equipment in a normal state beforehand are different. A relationship of the values is formulated. The diagnostic parameter is interpolated or extrapolated at an optional timing with use of the formula, whereby the parameter is converted to a diagnosis parameter in a state of a predetermined rotational speed and managed.
|
