In rotating machinery, rubbing occurs between the rotor and the stator, at the seal, between the rotor and the guide and between the rotor and the backup bearing. The backward rub or the partial impact vibration can be avoided by lubricating the contact surface sufficiently in order to decrease the friction. However, forward rub may still occur in such a case with a lubricated contact surface. Once such a forward rub occurs, it remains even if the rotational speed increases to much larger than the first bending critical speed and it is difficult to escape from this forward rubbing condition automatically. This paper proposes the suppression method of this forward rub by introducing the directional difference in the support stiffness of the guide or the backup bearing. The nonlinear theoretical analysis clarifies and explains the usefulness of the proposed method and it is also validated experimentally.
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e-mail: inoue@nuem.nagoya-u.ac.jp
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April 2011
Research Papers
Suppression of the Forward Rub in Rotating Machinery by an Asymmetrically Supported Guide
Tsuyoshi Inoue,
Tsuyoshi Inoue
Department of Mechanical Science and Engineering, School of Engineering,
e-mail: inoue@nuem.nagoya-u.ac.jp
Nagoya University
, Nagoya 464-8603, Japan
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Yukio Ishida,
Yukio Ishida
Department of Mechanical Science and Engineering, School of Engineering,
Nagoya University
, Nagoya 464-8603, Japan
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Gao Fei,
Gao Fei
Toyota Auto Body Co., Ltd.
, 100 Kanayama Ichiriyama-cho, Kariya, Aichi 448-8666, Japan
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Hossain Md Zahid
Hossain Md Zahid
Department of Mechanical and Chemical Engineering,
Islamic University of Technology
, Board Bazar, Gazipur-1704, Dhaka, Bangladesh
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Tsuyoshi Inoue
Department of Mechanical Science and Engineering, School of Engineering,
Nagoya University
, Nagoya 464-8603, Japane-mail: inoue@nuem.nagoya-u.ac.jp
Yukio Ishida
Department of Mechanical Science and Engineering, School of Engineering,
Nagoya University
, Nagoya 464-8603, Japan
Gao Fei
Toyota Auto Body Co., Ltd.
, 100 Kanayama Ichiriyama-cho, Kariya, Aichi 448-8666, Japan
Hossain Md Zahid
Department of Mechanical and Chemical Engineering,
Islamic University of Technology
, Board Bazar, Gazipur-1704, Dhaka, BangladeshJ. Vib. Acoust. Apr 2011, 133(2): 021005 (9 pages)
Published Online: March 1, 2011
Article history
Received:
August 21, 2009
Revised:
April 16, 2010
Online:
March 1, 2011
Published:
March 1, 2011
Citation
Inoue, T., Ishida, Y., Fei, G., and Zahid, H. M. (March 1, 2011). "Suppression of the Forward Rub in Rotating Machinery by an Asymmetrically Supported Guide." ASME. J. Vib. Acoust. April 2011; 133(2): 021005. https://doi.org/10.1115/1.4002120
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