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Technical Brief

Oscillating Journal Bearings Under Steady Load: A Numerical Study of Limiting Cases

[+] Author and Article Information
S. Boedo, D. P. Anderson

Department of Mechanical Engineering,
Rochester Institute of Technology,
Rochester, NY 14623

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received March 24, 2015; final manuscript received June 21, 2015; published online September 3, 2015. Assoc. Editor: Sinan Muftu.

J. Tribol 138(1), 014502 (Sep 03, 2015) (6 pages) Paper No: TRIB-15-1091; doi: 10.1115/1.4031313 History: Received March 24, 2015; Revised June 21, 2015

This note provides a more extensive assessment of bearing performance for steadily loaded oscillating journal bearings using the mobility method of solution. Even with significantly large journal oscillation amplitudes, unexpectedly thin films are predicted for conventional designs as the load number goes to zero. Offset journal bearing arrangements subjected to the same loads and kinematics are shown to provide a substantial improvement in film thickness, particularly at low oscillation amplitudes, compared with the conventional design configuration.

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References

Gupta, B. K. , and Phelan, R. M. , 1964, “ The Load Capacity of Short Journal Bearings With Oscillating Effective Speed,” ASME J. Basic Eng., 86(2), pp. 348–354. [CrossRef]
Booker, J. F. , Goenka, P. K. , and van Leeuwen, H. J. , 1982, “ Dynamic Analysis of Rocking Journal Bearings With Multiple Offset Segments,” ASME J. Lubr. Technol., 104(4), pp. 478–490 [Addendum, 105, 1983, p. 220]. [CrossRef]
Booker, J. F. , and Olikara, P. , 1984, “ Dynamics of Offset Bearings: Parametric Studies,” ASME J. Tribol., 106(3), pp. 352–358. [CrossRef]
Boedo, S. , and Booker, J. F. , 2009, “ Dynamics of Offset Journal Bearings–Revisited,” Proc. Inst. Mech. Eng., Part J, 223(3), pp. 359–369, 606–607. [CrossRef]
Cole, J. A. , and Hughes, C. J. , 1957, “ Visual Study of Film Extent in Dynamically Loaded Complete Journal Bearings,” Conference on Lubrication and Wear, IMechE, London, pp. 147–150.
Barwell, F. T. , Milne, A. A. , and Webber, J. S. , 1954–1955, “ Some Experiments on Oscillating Bearings,” Trans. Inst. Eng. Shipbuild. Scotl., 98(5), pp. 267–326.
Nelson, G. G. , and Gatcombe, K. , 1958, “ Oscillating Journal Bearing Oil Film Study,” ASME Paper No. 58-A-156.
Lu, X. , and Khonsari, M. M. , 2008, “ An Experimental Study of Oil-Lubricated Journal Bearings Undergoing Oscillatory Motion,” ASME J. Tribol., 130(2), p. 021702. [CrossRef]
Wakuri, Y. , Ono, S. , and Soejima, M. , 1982, “ On the Lubrication of Crosshead-Pin Bearing With Eccentric Journal,” Bull. JSME, 25(206), pp. 1312–1320. [CrossRef]
Wakuri, Y. , and Soejima, M. , 1985, “ Studies on Load Carrying Capacity of an Offset Typed Crosshead-Pin Bearing,” JSLE International Tribology Conference, Tokyo, July 8–10, pp. 319–324.
Goenka, P. K. , and Booker, J. F. , 1983, “ Effects of Surface Ellipticity on Dynamically Loaded Cylindrical Bearings,” ASME J. Lubr. Technol., 105(1), pp. 1–9. [CrossRef]
Booker, J. F. , 1965, “ Dynamically Loaded Journal Bearings: Mobility Method of Solution,” ASME J. Basic Eng., 87(3), pp. 537–546. [CrossRef]
Booker, J. F. , 1969, “ Dynamically Loaded Journal Bearings: Maximum Film Pressure,” ASME J. Lubr. Technol., 91(3), pp. 534–537. [CrossRef]
Booker, J. F. , 1971, “ Dynamically Loaded Journal Bearings: Numerical Application of the Mobility Method,” ASME J. Lubr. Technol., 93(1), pp. 168–174. [CrossRef]
Goenka, P. K. , 1984, “ Analytical Curve Fits for Solution Parameters of Dynamically Loaded Journal Bearings,” ASME J. Tribol., 106(4), pp. 421–428. [CrossRef]
Booker, J. F. , 2014, “ Mobility/Impedance Methods: A Guide for Application,” ASME J. Tribol., 136(2), p. 024501. [CrossRef]

Figures

Grahic Jump Location
Fig. 6

Radial component of mobility vector: short bearing film model

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Fig. 5

Cyclic maximum eccentricity ratio: conventional bearing, short bearing film model

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Fig. 4

Periodic journal orbits: conventional bearing, short bearing film model (relative to moving system frame)

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Fig. 3

Fixed and moving reference frame definitions (relative to load)

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Fig. 2

Periodic journal orbits: conventional bearing, short bearing film model (relative to fixed system frame)

Grahic Jump Location
Fig. 7

Limiting zero-load journal orbit radius

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Fig. 8

Schematic of three-segment offset bearing

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Fig. 9

Offset bearing kinematics [3]

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Fig. 10

Cyclic maximum eccentricity ratio: offset bearing, short bearing film model

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Fig. 11

Periodic journal orbits: offset bearing, short bearing film model

Tables

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