OPERATING CHARACTERISTICS OF POROUS FLOATING – RINGJOURNAL BEARINGS OPERATING WITH AN IMPROVEDBOUNDARY CONDITIONS
محتوى المقالة الرئيسي
الملخص
The static characteristics of porous floating ring journal bearing under hydrodynamic
lubrication condition when operating with an improved boundary conditions are theoretically
analyzed. An isothermal finite bearing theory was adopted during this analysis. The effect of
different parameters, namely, permeability, geometrical dimensions of the ring and the bearing are
considered. It was assumed that oil is supplied through the outside diameter of the bearing under
low supply pressure. The angular extent of the oil – film formed in journal – ring and ring – bearing
oil films was obtained by applying the integral momentum equation at the leading edge of the oil –
film to define the beginning of the oil extent. While, the continuity of flow across the trailing edge
was used to define the end of the oil extent. Numerical results show that the bearing performance
affected by different parameters namely, permeability, eccentricity ratios of inner and outer oil –
film, the clearance ratios, and the radii ratios.
تفاصيل المقالة
كيفية الاقتباس
تواريخ المنشور
المراجع
Abdallah A., Elsharkawy, Lotfi H., Guedouar, 2001, "Hydrodynamic Lubrication of
Porous Journal Bearing Using a Modified Brinkman-Extended Darcy Model", Tribology
International (34), July, pp. 767-777.
Andres, L. San, and Kerth, J., 2004, "Thermal Effect on the Performance of Floating Ring
Bearings for Turbochargers", Proc. Instri. Mech. Engrs., Part J., J. Engineering Tribology, vol. 218,
pp.437 – 450.
Cusano, C., 1979, "An analytical Study of Starved Porous Bearings", Transactions of the
ASME, January, vol. 101, pp. 38 – 47.
Dong, X., and Zhao, Z., 1990, "Experimental and Analytical Research on Floating – Ring
Bearing for Engine Applications", Journal of Tribology, January, vol. 112, pp. 119 – 122.
Goldstein, M. E., and Braun, W, H., 1971, "Effect of Velocity Slip at a Porous Boundary
on the Performance of an Incompressible Porous Bearing." NASA Technical Note TN D-6181.
Kaneko, S., Ohkawa, Y., Hashimoto, Y., 1994, "A Study of Mechanism of Lubrication in
Porous Journal Bearings: Effect of Dimensionless Oil –Feed Pressure on Static Characteristics
Under Hydrodynamic Lubrication Conditions", Transactions of the ASME, July, vol. 116, pp. 606 –
Kaneko, S., Hashimoto, Y., and Hiroki, I., 1997, "Analysis of Oil – Film Pressure
Distribution in Porous Journal Bearings Under Hydrodynamic Lubrication Conditions Using An
Improved Boundary Condition", Journal of Tribology, January, vol. 119, pp. 171 – 177.
Kettleborough, C. F., 1954, "Frictional Experiments on Lightly – Loaded Fully Floating
Ring Journal Bearing", Aust. J. of App. Sci., January, pp. 211 – 219.
Li, C. H., and Rohde, S. M., 1981, "On the Steady State and Dynamic Performance
Characteristics of Floating Ring Bearings", ASME Journal of Lubrication Technology, July, vol.
, pp. 389 – 397.
Morgan, V. T., and Cameron, A., 1957, "Study of the Design Criteria for Porous Metal
Bearings", Conference on Lubrication and Wear, Institution of Mechanical Engineers, London,
paper No. 88, pp. 405 – 408.
Orcutt, F. K., and Ng. C.W. 1968, "Steady – State and Dynamic Properties of the Floating
Ring Journal Bearing", ASME Journal of Lubrication Technology, vol. 90, pp. 1 – 10.
Prakash, J., and Vij, S., K., 1974, "Analysis of Narrow Porous Journal Bearing Using
Beavers – Joseph Criterion of Velocity Slip", Transaction of the ASME, June, pp. 348 – 354.
Quan Yong – Xin and Wang Pei – Ming, 1985, "Theoretical Analysis and Experimental
Investigation of Porous Metal Bearing", Tribology International, April, vol. 18, No. 2, pp. 67 – 73.
Reason, B. R., and Dyer, D., 1973, "A Numerical Solution for the Hydrodynamic
Lubrication of Finite Porous Journal Bearings." Proceedings of the Institution of Mechanical
Engineers, vol. 187, pp. 71-78.
Rohde, S. M., and Ezzat, M. A., 1980, "Analysis of Dynamically Loaded Floating Ring
Bearing for Automotive Application", ASME Journal of Lubrication Technology, July, vol. 102,
pp. 271 – 276.
Rouleau, W. T., 1963, "Hydrodynamic lubrication of Narrow Press-Fitted Porous Metal
Bearing," ASME Journal of Basic Engineering, vol., 85 pp. 123-128.
Shaw, M. C., and Nussdorfer, Jr., T. J., 1947, "An Analysis of the Full Floating Journal
Bearing", NACA Report, No. 866.
Tanaka, M. and Hori, Y., 1972, "Stability Characteristics of Floating Bush Bearings",
ASME Journal of Lubrication Technology, July, vol. 94, pp. 248-259.
Tatara, A., 1969, "Vibration Suppressing Effect of Floating Bush Bearings", Journal of
ASME vol., 72, pp. 1564-1569.
Yeon – Min Cheong and Kyung – Wood Kim, 2001, "Operating Characteristics of Counter
– rotating Floating Ring Journal Bearings", KSTLE International Journal, December, vol. 2, No. 2,
pp. 127 – 132.