ウェーブレット解析を利用した軸振動診断 : ラビングと軸受給油不足の検出(機械力学,計測,自動制御)

概要

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We developed a diagnosis method for unsteady rotor vibration using vibration repetition calculated from the results of wavelet analysis. In previous research, we compared measured vibration repetition with pre-measured abnormal vibration repetition. To improve the reliability of the diagnosis, we used differential vibration repetition, which is calculated by subtracting pre-measured normal vibration repetition from measured one. We measured abnormal vibration and applied the diagnosis method to the measured vibration, to determine the reliability of the method. An unsteady natural frequency vibration started, when rubbing on a rotor occurred. As lubricant in the bearings was reduced, a steady natural frequency vibration occurred, and it changed to an unsteady low frequency vibration. A steady super-harmonic vibration occurred when most of the lubricant in the bearings was absent. The reliability of the diagnosis was improved using deferential vibration repetition.
社団法人日本機械学会の論文
2006-10-25