| 摘要 |
The present invention aims to obtain a rotary machine having a function to stably measure an amount of wear of a sliding surface in a sliding bearing with a high degree of accuracy. The present invention provides a rotary machine including: a shaft rotated by torque transmitted from a driving source; a bearing for supporting the shaft; an oil film portion formed between the shaft and the bearing; an ultrasound sensor to propagate an ultrasound pulse toward the sliding surface or the reference step surface provided opposite to the ultrasound sensor installation surface and to receive the ultrasound pulse reflected by the oil film portion; and a diagnostic unit to drive the ultrasound sensor to compare a prestored intensity of the ultrasound pulse in the oil film portion and an intensity of the ultrasound pulse reflected by the oil film portion.
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