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TECHNICAL PAPERS

Effects of Distance Between Pads on the Inlet Pressure Build-Up on Pad Bearings

[+] Author and Article Information
Jong-Soo Kim

KMC, Inc., 20 Technology Way, West Greenwich, RI 02817 e-mail: jkim@kmcbearings.com

Kyung-Woong Kim

Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejon, Korea

J. Tribol 124(3), 506-514 (May 31, 2002) (9 pages) doi:10.1115/1.1456452 History: Received March 01, 2001; Revised August 14, 2001; Online May 31, 2002
Copyright © 2002 by ASME
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References

Hashimoto,  H., Wada,  S., and Yoshida,  T., 1989, “Pressure Boundary Conditions of High Speed Thrust Bearings,” JSME Int. J., Ser. III, 32, pp. 269–280.
Hashimoto,  H., 1990, “Performance Characteristics Analysis of Sector-Shaped Pad Thrust Bearings In Turbulent Inertia Flow Regime Under Three Types of Lubrication Conditions,” ASME J. Tribol., 112, pp. 477–485.
Kim,  J. S., and Kim,  K. W., 1992, “Inlet Pressure Effects on the Static and Dynamic Characteristics of Tilting-Pad Journal Bearings,” JSME Int. J., Ser. III, 35, No. 1, pp. 121–127.
Mori, A., and Mori, H., 1986, “Inlet Boundary Condition for Submerged Multi-Pad Bearing Relative to Fluid Inertia Forces,” The 13th Leeds-Lyon Symposium on Tribology.
King, K. F., and Taylor, C. M., 1975, “An Experimental Investigation of a Single Pad Thrust Bearing Capable of Operating in the Turbulent Lubricant Regime,” The 2nd Leeds-Lyon Symposium on Tribology.
Rodkiewicz,  C. M., Kim,  K. W., and Kennedy,  J. S., 1990, “On the Significance of the Inlet Pressure Build-Up in the Design of Tilting-Pad Bearings,” ASME J. Tribol., 112, pp. 17–22.
Contantinescu,  V. N., Galetuse,  S., and Jennedy,  F., 1975, “On the Comparison Between Lubrication Theory, Including Turbulence and Inertia Forces, and Some Existing Experimental Data,” ASME J. Lubr. Technol., 97, pp. 439–449.
Tichy,  J. A., and Chen,  S.-H., 1985, “Plane Slider Bearing Load Due to Fluid Inertia-Experimental and Theory,” ASME J. Tribol., 107, pp. 32–38.
Tipei,  N., 1978, “Flow Characteristics and Pressure Head Build-Up at the Inlet of Narrow Passages,” ASME J. Lubr. Technol., 100, pp. 47–55.
Tipei,  N., 1982, “Flow and Pressure Head at the Inlet of Narrow Passages, Without Upstream Free Surface,” ASME J. Lubr. Technol., 104, pp. 196–202.
Pan,  C. H. T., 1974, “Calculation of Pressure, Shear, and Flow in Lubrication Films for High Speed Bearings,” ASME J. Lubr. Technol., 96, pp. 80–94.
Heckelman,  D. D., and Ettles,  C. M. M., 1988, “Viscous and Inertia Pressure Effects at the Inlet to a Bearing Film,” STLE Tribol. Trans., 31, pp. 1–5.
Rhim,  Y., and Tichy,  J. A., 1988, “Entry Flow of Lubricant into a Slider Bearing—Analysis and Experiment,” STLE Tribol. Trans., 31, pp. 350–358.
Rhim,  Y., and Tichy,  J. A., 1980, “Entrance and Inertia Effects in a Slider Bearing,” STLE Tribol. Trans., 32, pp. 469–479.
Mori, A., Makino, T., and Mori, H., 1990, “Inertia Effect in a Submerged Multi-Pad Bearing Under High Reynolds Number With Special Attention To Inlet Pressure Jump,” Proc. of Japan Inter. Trib. Conference, Nagoya, pp. 911–916.

Figures

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Illustration of discontinuous lubricating film bearing
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Representation of numerical solution domain
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Inlet pressure coefficient
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A simplified flow model for the extended Bernoulli equation
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Comparison between loss coefficients by numerical analysis and by Eqs. (8) and (9)
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Schematic diagram of slider bearing
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Effect of distance between pads on film pressure
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Effect of distance between pads on load carrying capacity
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Schematic diagram of experimental apparatus
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Close-up view of test pad
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Dimension and geometry of test pad
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Film pressure distribution in the mid plane, θg=4 deg
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Film pressure distribution in the mid plane, θg=14 deg
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Film pressure distribution in the mid plane, θg=34 deg
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Comparison of inlet pressure factor
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Comparison between theoretical and experimental pivot film thickness
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Inlet pressure distribution measured by experiment

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