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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Feasibility of Contact Elimination of a Mechanical Face Seal Through Clearance Adjustment

[+] Author and Article Information
Min Zou, Joshua Dayan, Itzhak Green

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

J. Eng. Gas Turbines Power 122(3), 478-484 (May 15, 2000) (7 pages) doi:10.1115/1.1287239 History: Received March 09, 1999; Revised May 15, 2000
Copyright © 2000 by ASME
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References

Buck,  G. S., 1980, “A Methodology for Design and Application of Mechanical Seals,” ASLE Trans., 23, No. 3, pp. 24–252.
Will,  T. P., 1982, “Experimental Observation of a Face-Contact Mechanical Shaft Seal Operation on Water,” Lubr. Eng., 38, No. 12, pp. 767–772.
Etsion,  I., and Burton,  R. A., 1979, “Observation of Self-Excited Wobble in Face Seals,” ASME J. Lubr. Technol., 101, No. 4, pp. 526–528.
Metcalfe,  R., 1982, “Dynamic Whirl in Well-Aligned, Liquid-Lubricated End-Face Seals with Hydrostatic Tilt Instability,” ASLE Trans., 25, No. 1, pp. 1–6.
Sehnal,  J., Sedy,  J., Zobens,  A., and Etsion,  I., 1983, “Performance of the Coned-Face End Seal with Regard to Energy Conservation,” ASLE Trans., 26, No. 4, pp. 415–429.
Etsion,  I., and Constantinescu,  I., 1984, “Experimental Observation of the Dynamic Behavior of Noncontacting Conedface Mechanical Seals,” ASLE Trans., 27, No. 3, pp. 263–270.
Green,  I., 1989, “Gyroscopic and Support Effects on the Steady-State Response of a Noncontacting Flexibly-Mounted Rotor Mechanical face Seal,” ASME J. Tribol., 111, pp. 200–208.
Green, I., 1990, “Gyroscopic and Damping Effects on the Stability of a Noncontacting Flexibly-Mounted Rotor Mechanical Face Seal,” Dynamics of Rotating Machinery, Hemisphere Publishing, Bristol, PA, pp. 153–173.
Lee,  A. S., and Green,  I., 1994, “Higher Harmonic Oscillation in a Flexibly Mounted Rotor Mechanical Seal Test Rig,” ASME J. Vibr. Acoust., 116, No. 2, pp. 161–167.
Lee,  A. S., and Green,  I., 1995, “Physical Modeling and Data Analysis of the Dynamic Response of Flexibly Mounted Rotor Mechanical Seal,” ASME J. Tribol., 117, No. 1, pp. 130–135.
Lee,  A. S., and Green,  I., 1995, “An Experimental Investigation of the Steady-State Response of a Noncontacting Flexibly Mounted Rotor Mechanical Face Seal,” Trans. ASME, J. Tribol., 177, No. 1, pp. 153–159.
Zou, M., and Green, I., 1997, “Real-Time Condition Monitoring of Mechanical Face Seal,” Proceedings the 24th Leeds-Lyon Symposium on Tribology, London, Imperial College, pp. 423–430.
Zou,  M., and Green,  I., 1999, “Clearance Control of a Mechanical Face Seal,” STLE Tribol. Trans., 42, No. 3, pp. 535–540.
Salant, R. F., Miller, A. L., Kay, P. L., Kozlowski, J., Kay, W. E., and Algrain, M. C., 1987, “Development of an Electrically Controlled Mechanical Seal,” Proceedings 11th International Conference on Fluid Sealing, BHRA, pp. 576–595.
Heilala, A. J., and Kangasneimi, A., 1987, “Adjustment and Control of a Mechanical Seal Against Dry Running and Severe Wear,” Proceedings 11th International Conference on Fluid Sealing, BHRA, pp. 548–575.
Etsion,  I., Palmor,  Z. J., and Harari,  N., 1991, “Feasibility Study of a Controlled Mechanical Seal,” Lubr. Eng., 47, No. 8, pp. 621–625.
Wolff,  P., and Salant,  R. F., 1995, “Electronically Controlled Mechanical Seal for Aerospace Applications: Part II—Transient Tests,” Tribol. Trans., 38, No. 1, pp. 51–56.
Zou, M., Dayan, J., and Green, I., 1999, “Parametric Analysis for Contact Control of a Noncontacting Mechanical Face Seal,” Proceedings of Vibration, Noise & Structural Dynamics, Venice Italy, April 28–30, 1999, pp. 493–499.
Green,  I., 1987, “The Rotor Dynamic Coefficients of Coned-Face Mechanical Seals with Inward or Outward Flow,” ASME J. Tribol., 109, No. 1, pp. 129–135.
Dayan, J., Zou, M., and Green, I., 1999, “Sensitivity Analysis for the Design and Operation of a Noncontacting Mechanical Face Seal,” J. Mech. Eng. Sci., in print.
Zou, M., 1998, “Real-Time Monitoring and Control of a Noncontacting Mechanical Face Seal,” Ph.D. thesis, Georgia Institute of Technology, Atlanta, GA.

Figures

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Schematic of the FMR noncontacting mechanical seal assembly
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Maximum normalized relative misalignment—coning angle relationship
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Desired clearances and clearances calculated from proximity probe measurements (small stator and initial rotor misalignments γsri=0.5 mrad)
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Proximity probe signals and their PSDs for different clearances (6 μm and 1 μm) (small stator and initial rotor misalignments γsri=0.5 mrad)
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Rotor angular misalignment orbit for different clearances (6 μm, 3 μm, and 1 μm) (small stator and initial rotor misalignments γsri=0.5 mrad)
Grahic Jump Location
Desired clearances and clearances calculated from proximity probe measurements (large stator and initial rotor misalignments γsri=1.5 mrad)
Grahic Jump Location
Proximity probe signals and their PSDs for different clearances (6 μm and 1 μm) (large stator and initial rotor misalignments γsri=1.5 mrad)
Grahic Jump Location
Rotor angular misalignment orbit for different clearances (large stator and initial rotor misalignments γsri=1.5 mrad)

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