Abstract
To monitor the shaft vibration of a rotary machine, the rotating pulse signal and the shaft vibration signal are detected by one vibration sensor, and vibration data is derived from this measured result by data processing. The vibration wave is analyzed, and the characteristics of the shaft vibration are gained. This method is applied to a measurement of the shaft vibration of a vertical-type rotary machine. A method by which the position of a rotor on a vertical direction is gained, is shown. This method is applied to a rotary machine. From the measurement of the position of the rotor on the vertical direction, the state of the rotor and the variance of the bearing gap according to the rotation are known in the rotation. By use of this result, we can monitor the magnitude of the abrasion of the bearing.
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