For improving the dynamic performance of the annular plain seals employed in pumps, porous materials are applied to the seal surface by insertion into the inlet part of the seal. The linear stiffness and damping coefficients of the seal film are calculated in the laminar-flow regime, assuming the mass effect of the fluid to be negligibly small. Numerical results show that the annular plain seals with the porous materials have larger main stiffness terms and smaller cross-coupled stiffness terms and main damping terms than the conventional ones with the solid surfaces. This tendency is more marked with increasing the axial length of the porous matrix applied to the seal surface. The larger main stiffness terms for “the porous seal” yield larger radial reaction force acting on a rotor as a consequence of small whirling motion of shaft about a centered position, which would contribute to rotor stability.
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October 1990
Research Papers
Application of Porous Materials to Annular Plain Seals: Part 2—Dynamic Characteristics
S. Kaneko
S. Kaneko
Department of Mechanical Engineering, Nagaoka University of Technology, Kamitomioka, Nagaoka, 940-21, Japan
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S. Kaneko
Department of Mechanical Engineering, Nagaoka University of Technology, Kamitomioka, Nagaoka, 940-21, Japan
J. Tribol. Oct 1990, 112(4): 624-630 (7 pages)
Published Online: October 1, 1990
Article history
Received:
October 13, 1988
Revised:
May 30, 1990
Online:
June 5, 2008
Connected Content
This is a companion to:
Application of Porous Materials to Annular Plain Seals: Part 1—Static Characteristics
Citation
Kaneko, S. (October 1, 1990). "Application of Porous Materials to Annular Plain Seals: Part 2—Dynamic Characteristics." ASME. J. Tribol. October 1990; 112(4): 624–630. https://doi.org/10.1115/1.2920307
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