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�������պ����ѧѧ�� 1998, Vol. 24 Issue (1) :104-107    DOI:
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Acoustic Emission Apparatus for Rubbing Diagnosis of Large Rotating Machinery
Wu Jian, Liang Jiahui, Li Huailing*
1.Beijing University of Aeronautics and Astronautics,Dept.of Applied Mathematics and Physics;
2.Beijing Machinery Design Research Institute

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Abstract�� 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 discussed.Both research of AE process and field experements indicate that periodic components in the envelop spectrum related to rotational speed increase evidently at the beginning of rubbing production,hence are highly sensitive to the rubbing fault diagnosis.According to the new design an acoustic emission equipment for the rubbing diagnosis named BUAA AE testing system is developed and described.
Keywords�� acoustic emission detection systems   fault diagnosis   rotating mechanisms   rubbing     
Received 1996-07-08;
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�⽨, ���һ�, ���.����ת����е��Ħ���Ϸ�������������ϵͳ[J]  �������պ����ѧѧ��, 1998,V24(1): 104-107
Wu Jian, Liang Jiahui, Li Huailing.Acoustic Emission Apparatus for Rubbing Diagnosis of Large Rotating Machinery[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 1998,V24(1): 104-107
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y1998/V24/I1/104
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