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TECHNICAL PAPERS

Semi-Analytical Dynamic Analysis of Spiral-Grooved Mechanical Gas Face Seals

[+] Author and Article Information
Brad A. Miller

Department of Mechanical and Aerospace Engineering and Engineering Mechanics, University of Missouri-Rolla, 1870 Miner Circle, Rolla, MO 65409-0050

Itzhak Green

George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405

J. Tribol 125(2), 403-413 (Mar 19, 2003) (11 pages) doi:10.1115/1.1510876 History: Received April 16, 2002; Revised July 25, 2002; Online March 19, 2003
Copyright © 2003 by ASME
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References

Shapiro,  W., and Colsher,  R., 1974, “Steady State and Dynamic Analysis of a Jet-Engine, Gas Lubricated Shaft Seal,” ASLE Trans., 17, pp. 190–200.
Leefe, S., 1994, “Modeling of Plain Face Gas Seal Dynamics,” 14th Int. Conf. Fluid Sealing, BHR Group Conference Series No. 9, B. Halligan, ed., Professional Engineering Publishing, Suffolk, UK, pp. 397–424.
Green,  I., and Barnsby,  R. M., 2001, “A Simultaneous Numerical Solution for the Lubrication and Dynamic Stability of Noncontacting Gas Face Seals,” ASME J. Tribol., 123(2), pp. 388–394.
Miller,  B., and Green,  I., 2001, “Numerical Formulation for the Dynamic Analysis of Spiral-Grooved Gas Face Seals,” ASME J. Tribol., 123(2), pp. 395–403.
Ruan,  B., 2002, “Numerical Modeling of Dynamic Sealing Behaviors of Spiral Groove Gas Face Seals,” ASME J. Tribol., 124(1), pp. 186–195.
Green,  I., and Barnsby,  M. R., 2002, “A Parametric Analysis of the Transient Forced Response of Noncontacting Gas Coned Face Seals,” ASME J. Tribol., 124(1), pp. 151–157.
Green,  I., and Etsion,  I., 1985, “Stability Threshold and Steady-State Response of Noncontacting Coned-Face Seals,” ASLE Trans., 28, pp. 449–460.
Malanoski,  S. B., and Pan,  C. H. T., 1965, “The Static and Dynamic Characteristics of the Spiral-Grooved Thrust Bearing,” ASME J. Basic Eng., 87, pp. 547–558.
Zirkelback,  N., and San Andrès,  L., 1999, “Effect of Frequency Excitation on Force Coefficients of Spiral Groove Gas Seals,” ASME J. Tribol., 121(4), pp. 853–863.
Ruan,  B., 2002, “A Semi-Analytical Solution to the Dynamic Tracking of Non-Contacting Gas Face Seals,” ASME J. Tribol., 124(1), pp. 196–202.
Miller,  B., and Green,  I., 2002, “Numerical Techniques for Computing Rotordynamic Properties of Mechanical Gas Face Seals,” ASME J. Tribol., 124(4), pp. 755–761.
Gross, W. A., 1980, Fluid Film Lubrication, John Wiley & Sons, New York.
Miller,  B., and Green,  I., 1998, “Constitutive Equations and the Correspondence Principle for the Dynamics of Gas Lubricated Triboelements,” ASME J. Tribol., 120(2), pp. 345–352.
Elrod,  H. G., McCabe,  J. T., and Chu,  T. Y., 1967, “Determination of Gas-Bearing Stability by Response to a Step-Jump,” ASME J. Lubr. Technol., 89, pp. 493–498.
Miller,  B., and Green,  I., 1997, “On the Stability of Gas Lubricated Triboelements Using the Step Jump Method,” ASME J. Tribol., 119(1), pp. 193–199.

Figures

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Schematic of a mechanical face seal in a flexibly mounted stator configuration
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Mechanical face seal kinematic model and spiral groove geometry profile
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Step responses computed by numerical solution and the approximate constitutive model; (a) Direct axial step responses; (b) Direct tilt step responses; and (c) Cross-coupled tilt step responses.
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Frequency responses computed by numerical solution and the approximate constitutive model; (a) Direct axial frequency responses; (b) Direct tilt frequency responses; and (c) Cross-coupled tilt frequency responses.
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Stator axial and tilt responses to initial velocity conditions computed by numerical simulation and the gas film correspondence principle (Ω=2094.4 rad/s)
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Stator tilt response to rotor runout alone computed by numerical simulation (Ω=2094.4 rad/s)
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X and Y components of stator tilt response to initial stator misalignment alone computed by numerical simulation (Ω=2094.4 rad/s)
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Tilt vector diagram showing the relationship among the stator tilt responses
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Stator tilt response to rotor runout and initial stator misalignment computed by numerical simulation (Ω=2094.4 rad/s)
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Relative tilt response to rotor runout and initial stator misalignment computed by numerical simulation (Ω=2094.4 rad/s)
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Stator tilt response to initial velocity conditions near stability threshold computed by numerical simulation (Ω=2094.4 rad/s)

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