In large rotating machinery using filmatic bearing (turbogenerator,air compressor,etc.) there is a potential trouble from impefect installation or running conditions,a metals' contact between rotors and shells.The trouble is usully called rubbing.The advantage of AE technologe in the rubbing diagnosis and early detection is showed.Instead of classical AE characteristic parameters (counts,amplitude,energy,duration and the other ones) a new feature extraction by frequency analysis of AE envelop signals is dis...
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