Method and apparatus for detecting rubbing in a rotary machine
US4478082A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 1982 |
| Grant date | Oct 23, 1984 |
| Priority date | — |
| Expiry date | Aug 17, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/2693
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.