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Design of damping-ring for vibration control in labyrinth air seals
Zeng Liang, Li Lin*
School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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Abstract�� The design and application of severed damping-ring to rotor/stator components are effective in protecting labyrinth air seals and the cylindrical walls of annular chambers against flexural vibration and fatigue failures excited by various disturbing forces. The dynamic analysis of contact system was complex due to its non-linear and chaotic behavior in the process. The theory for vibration control in labyrinth air seals was built up by elastic mechanics and contact mechanics. The dynamic response of labyrinth air seals with different damping-ring and contact pressure was analyzed by dynamic compliance method. The simulation results confirmed the validity of the proposed model and method and showed that the damping-ring could reduce the amplitude of the labyrinth air seals notably. There were the best parameters of damping-ring, which lead to the best effect of vibration control. The vibration control of damping-ring was different to different modal shape of labyrinth air seals.
Keywords�� air seals   damping-ring   dry friction   vibration control     
Received 2006-06-05;
About author: �� ��(1976-),��,�Ĵ�������,��ʿ��,zlzlzl129@163.com.
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����, ����.�������ݷ���װ�õļ������ỷ�������[J]  �������պ����ѧѧ��, 2007,V33(05): 518-522
Zeng Liang, Li Lin.Design of damping-ring for vibration control in labyrinth air seals[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2007,V33(05): 518-522
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