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TECHNICAL PAPERS

Experimental Study on Static and Dynamic Characteristics of Liquid Annular Convergent-Tapered Damper Seals With Honeycomb Roughness Pattern

[+] Author and Article Information
Satoru Kaneko

Department of Mechanical Engineering, Nagaoka University of Technology, Kamitomioka, Nagaoka, 940-2188, Japan

Takashi Ikeda

Tokyo Electron Kyushu Co., Ltd., Nishiaramachi, Tosu, Saga, 864-0074, Japan

Takuro Saito

Oji Paper Co., Ltd., Ojicho, Tomakomai, Hokkaido, 053-8711, Japan

Shin Ito

NOK Co., Ltd., Shibadaimon, Minato-ku, Tokyo, 105-8585, Japan

J. Tribol 125(3), 592-599 (Jun 19, 2003) (8 pages) doi:10.1115/1.1538621 History: Received May 08, 2002; Revised October 25, 2002; Online June 19, 2003
Copyright © 2003 by ASME
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References

Von Pragenau, G. L., 1982, “Damping Seals for Turbomachinery,” NASA Technical Paper 1987.
Childs,  D. W., and Kim,  C-H., 1985, “Analysis and Testing for Rotordynamic Coefficients of Turbulent Annular Seals with Different, Directionally Homogeneous Surface Roughness Treatment for Rotor and Stator Elements,” ASME J. Tribol., 107, pp. 296–306.
Childs,  D. W., and Kim,  C-H., 1986, “Test Results for Round-Hole-Pattern Damper Seals: Optimum Configurations and Dimensions for Maximum Net Damping,” ASME J. Tribol., 108, pp. 605–611.
Childs,  D. W., and Garcia,  F., 1987, “Test Results for Sawtooth-Pattern Damper Seals: Leakage and Rotordynamic Coefficients,” ASME J. Tribol., 109, pp. 124–128.
Childs,  D. W., Nolan,  S. A., and Kilgore,  J. J., 1990, “Additional Test Results for Round-Hole-Pattern Damper Seals: Leakage, Friction Factors, and Rotordynamic Force Coefficients,” ASME J. Tribol., 112, pp. 365–371.
Iwatsubo, T., and Sheng, B., 1990, “An Experimental Study on the Static and Dynamic Characteristics of Damper Seals,” Proceedings of the Third IFToMM International Conference on Rotordynamics, Lyons, France, pp. 307–312.
Childs,  D. W., and Fayolle,  P., 1999, “Test Results for Liquid “Damper” Seals Using a Round-Hole Roughness Pattern for the Stators,” ASME J. Tribol., 121, pp. 42–49.
Childs, D. W., 1984, “Finite-Length Solutions for the Rotordynamic Coefficients of Constant-Clearance and Convergent-Tapered Annular Seals,” Proc. Inst. Mech. Eng., Paper C276/84, pp. 223–231.
Childs,  D. W., and Dressman,  J. B., 1985, “Convergent-Tapered Annular Seals: Analysis and Testing for Rotordynamic Coefficients,” ASME J. Tribol., 107, pp. 307–317.
Simon,  F., and Fre⁁ne,  J., 1989, “Static and Dynamic Characteristics of Turbulent Annular Eccentric Seals: Effect of Convergent-Tapered Geometry and Variable Fluid Properties,” ASME J. Tribol., 111, pp. 378–384.
Scharrer,  J. K., and Nelson,  C. C., 1991, “Rotordynamic Coefficients for Partially Tapered Annular Seals: Part I—Incompressible Flow,” ASME J. Tribol., 113, pp. 48–52.
Lindsey,  W. T., and Childs,  D. W., 2000, “The Effects of Converging and Diverging Axial Taper on the Rotordynamic Coefficients of Liquid Annular Pressure Seals: Theory Versus Experiment,” ASME J. Vibr. Acoust., 122, pp. 126–131.
Childs,  D., Elrod,  D., and Hale,  K., 1989, “Annular Honeycomb Seals: Test Results for Leakage and Rotordynamic Coefficients; Comparisons to Labyrinth and Smooth Configurations,” ASME J. Tribol., 111, pp. 293–301.
Yu.,  Z., and Childs,  D. W., 1998, “A Comparison of Experimental Rotordynamic Coefficients and Leakage Characteristics Between Hole-Pattern Gas Damper Seals and a Honeycomb Seal,” ASME J. Tribol., 120, pp. 778–783.
Darden, J. M., Earhart, E. M., and Flowers, G. T., 2001, “Influence of Seal Geometry on the Rotordynamic Characteristics of a Round-Hole Pattern Damping Seal,” Proceedings of the 2001 ASME Vibration Conference, DETC2001/VIB-21635.
Kaneko,  S., Kamei,  H., Yanagisawa,  Y., and Kawahara,  H., 1998, “Experimental Study on Static and Dynamic Characteristics of Annular Plain Seals With Porous Materials,” ASME J. Tribol., 120, pp. 165–172.
Measurement Uncertainty, ANSI/ASME PTC 19.1-1985 Part 1, 1986 (reaffirmed 1990).

Figures

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Schematic view of experimental apparatus
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Geometry of convergent-tapered honeycomb damper seal (cross-sectional view)
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Small whirling motion of rotor about seal center and dynamic fluid-film forces
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Leakage flow rate versus rotor spinning velocity
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Axial pressure distributions in seal clearance at concentric position; ω=0,Ω=0
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Dynamic force coefficients versus ratio of whirling velocity to spinning velocity; ω=1200 rpm: (a) tangential force coefficient; and (b) radial force coefficient.
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Axial distributions of dynamic force components per unit seal length; ω=1200 rpm,Ω=−1500 rpm
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Dynamic coefficients versus rotor spinning velocity: (a) main damping coefficient; (b) cross-coupled damping coefficient; (c) main stiffness coefficient; and (d) cross-coupled stiffness coefficient.
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Dynamic coefficients versus taper parameter; ω=1800 rpm: (a) damping coefficients; and (b) stiffness coefficients.
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Dynamic coefficients versus taper parameter; ω=2400 rpm: (a) damping coefficients; and (b) stiffness coefficients.
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Effective damping coefficient versus rotor spinning velocity

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