synchronous analysis for diagnostics of rolling bearings in the turbojet engine
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ID: 234907
2005
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Abstract
Designed in the Aviation Institute, the K-15 turbojet
engine has got rolling bearings, which answers with frequency
5.87×ωr the unbalance excitation. The signal with such frequency indicates a fault of the outer race of the rolling bearing. A set of the digital synchronous filters was used for the
K-15 vibration spectrum analysis. A procedure of filtration was performed by the computer software. The sychronous summation of the measured signals was carried out before the spectrum analysis. Two cases were considered: the engine with a small force due to
unbalance (a small angular velocity of the rotor), and the engine with a big unbalance force (high angular velocity). In the first case, the outer race frequency was not observed, despite the existence of the vibration amplitude (caused by unknown disturbances) with such frequency before the synchronous summation. In the second case, the outer race frequency after synchronous summation has enlarged amplitude while other spectrum
components in its vicinity have been damped. It underlines the usefulness of the synchronous analysis in the vibration diagnostics of the rotating machinery.
| Reference Key |
gosiewski2005internationalsynchronous
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|---|---|
| Authors | ;Zdzislaw Gosiewski;Andrzej Romaniuk |
| Journal | ACS omega |
| Year | 2005 |
| DOI |
10.1155/IJRM.2005.128
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| URL | |
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