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RESEARCH PAPERS

Experimental Characterization of the Influence of Coating Materials on the Hydrodynamic Behavior of Thrust Bearings: A Comparison of Babbitt, PTFE, and PFA

[+] Author and Article Information
C. A. Mahieux

Alstom (Switzerland) Ltd. Hydrogenerateur Technology Center CH-5242 Birr Switzerland

J. Tribol 127(3), 568-574 (Jun 13, 2005) (7 pages) doi:10.1115/1.1843160 History: Received June 24, 2003; Revised January 15, 2004; Online June 13, 2005
Copyright © 2005 by ASME
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References

Simmons,  J. E. L., Knox,  R. T., and Moss,  W. O., 1998, “The Development of PTFE (polytetrafluoroethylene)-Faces Hydrodynamic Thrust Bearings for Hydrogenerator Application in the United Kingdom,” Proc. Instn. Mech. Engrs.,212, Part J, pp. 345–352.
Simpson, J., 1985, “Thermoplastic Bearing,” Second conference on material engineering, London, pp. 195–204.
Hager,  A. M., Friedrich,  K., and Junghans,  R., 1993, “Selected Thermoplastic Bearing Materials for Use at Elevated Temperatures,” Wear, 162–64, pt. B, pp. 649–655.
Pedley, F. W., 1985, “Thermoplastic Bearing,” Bearings: searching for longer life, Mechanical engineering publication Ltd., Cheltenham, England, pp. 15–23.
Xue,  Q.-J. , 1998, “Friction and Wear Characteristics of Fiber- and Whisker-Reinforced PTFE Composites Under Oil Lubricated Conditions,” J. Appl. Polym. Sci., 69, pp. 1393–1402.
Zhang,  Z.-Z. , 1998, “Friction and Wear Behaviors of Several Polymers Under Oil-Lubricated Conditions,” J. Appl. Polym. Sci., 68, pp. 2175–2182.
Reincke,  R., Haupert,  F., and Friedrich,  K., 1998, “On the Tribological Behavior of Selected, Injection Moulded Thermoplastic Composites,” Composites, Part A, 29A, pp. 763–771.
Stehuramia  , 1991, “Lubricated Wear of PTFE and Graphited PTFE,” Lubr. Sci., 3(3), pp. 181–188.
Kelly, D. A., Barnes, C. G., and Ruold, L. M., 1998, “Aspect of Thrust Cone Tribology. Part 1: Effects of Slide to Roll Ratio on Surface Failure,” Proceedings of the Institution of Mechanical Engineers-Part I-J. Eng. Tribol. 212 (1), pp. 55–72.
Ettles, C., Knox, R., Fergusson, J., and Horner, D., 2002, “Test Results for PTFE-Faced Thrust Pads, With Direct Comparisin Against Babbitt-Faced Pads and Correlation With Analysis,” ASME paper 2002-TRIB-0111.
Glavatskih,  S., 2003, “Evaluating Thermal Performance of a PTFE-Faced Tilting Pad Thrust Bearing,” J. Tribol., 125, pp. 319–324.
Höbel,  M., and Haffner,  K., 1999, “An On-Line Monitoring System for Oil-Film, Pressure and Temperature Distribution in Large-Scale Hydro-Generator Bearings,” Meas. Sci. Technol., 10, pp. 393–402.
Comolet, R., 1976, Mecanique Experimentale des Fluides, Tome II Dynamique des-Fluides Reels, Turbomachines, Masson, Paris, pp. 107–108.
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Figures

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Picture of pads on disk in operating position
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Pad geometry (in millimeters). Lower pad (upper pad geometry obtained via mirror symmetry).
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Babbitt 1000 rpm, 2.5 MPa applied mean pressure, 60°C, pressure profiles
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PTFE 1000 rpm, 2.5 MPa applied mean pressure, 60°C, pressure profiles
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PFA 1000 rpm, 2.5 MPa applied mean pressure, 60°C, pressure profiles
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Pmax/Pmean versus speed under 2, 3, and 4 MPa at 60°C for Babbitt, PTFE, and PFA
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Tangential angle versus speed under 2, 3, and 4 MPa at 60°C for Babbitt, PTFE, and PFA
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Radial angle (tilting) versus speed under 2, 3, and 4 MPa for Babbitt, PTFE, and PFA
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h1 versus speed under 2, 3, and 4 MPa at 60°C for Babbitt, PTFE, and PFA
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h2 versus speed under 2, 3, and 4 MPa at 60°C for Babbitt, PTFE, and PFA
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Tpad versus speed under 2, 3, and 4 MPa at 60°C for Babbitt, PTFE, and PFA
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Drive power versus speed under 2, 3, and 4 MPa at 60°C for Babbitt, PTFE, and PFA

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