Method and apparatus for detecting rubbing in a rotary machine

Details Method and apparatus for detecting rubbing in a rotary machine Method and apparatus for detecting rubbing in a rotary machine

1982-08-17

1984-10-23

Gill, James J.

Measuring and testing

Vibration

By mechanical waves

73660, G01H 100, G01M 1300

Patent

active

044780826

ABSTRACT:
A method and apparatus for detecting the occurrence of rubbing in a rotary machine, in which at least one acoustic sensor is mounted on at least the rotor part or the stator part of the rotary machine, and the output signal from the acoustic sensor is detected and then filtered to extract a frequency component having a frequency substantially equal to the rotational frequency of the rotary machine, so as to detect the occurrence of rubbing in the rotary machine as early as possible and also to locate the source of the rubbing. Even when the occurrence of abnormal metal-to-metal contact at a bearing of the rotary machine is detected, it is discriminated from rubbing so that the occurrence of the rubbing can be reliably detected.

REFERENCES:
patent: 3012434 (1961-12-01), Wehof
patent: 3307408 (1967-03-01), Thomas et al.
patent: 3400578 (1968-09-01), Frarey et al.
patent: 4377947 (1983-03-01), Matsushita et al.

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