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TECHNICAL PAPERS

Thermally Induced Seizure in Journal Bearings During Startup and Transient Flow Disturbance

[+] Author and Article Information
Rajesh Krithivasan, M. M. Khonsari

Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA 70808

J. Tribol 125(4), 833-841 (Sep 25, 2003) (9 pages) doi:10.1115/1.1538619 History: Received July 11, 2002; Revised October 22, 2002; Online September 25, 2003
Copyright © 2003 by ASME
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References

Bishop,  J. L., and McC Ettles,  C. M., 1982, “The Seizure of Journal Bearings by Thermoelastic Mechanisms,” Wear, 79, pp. 37–52.
Dufrane,  K., and Kannel,  J., 1989, “Thermally Induced Seizures of Journal Bearings,” ASME J. Tribol., 111, pp. 288–292.
Khonsari,  M. M., and Kim,  H. J., 1989, “On Thermally Induced Seizure in Journal Bearings,” ASME J. Tribol., 111, pp. 661–667.
Hazlett,  T. L., and Khonsari,  M. M., 1992, “Finite Element Model of Journal Bearing Undergoing Rapid Thermally Induced Seizure,” Tribol. Int., 25 (3), pp. 177–182.
Hazlett, T. L., 1990, “Thermoelastic Behavior of Journal Bearing Undergoing Seizure—A Finite Element Study,” M.S. thesis, University of Pittsburgh, Pittsburgh, PA.
Wang,  H., Conry,  T. F., and Cusano,  C., 1996, “Effects of Cone/Axle Rubbing Due to Roller Bearing Seizure on the Thermomechanical Behavior of a Railroad Axle,” ASME J. Tribol., 118, pp. 311–319.
Wang, H., 1996, “Axle Burn-off and Stack-up Force Analyses of a Railroad Roller Bearing using the Finite Element Method,” Ph.D. thesis, Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign.
Wang,  Q., 1997, “Seizure Failure of Journal-Bearing Conformal Contacts,” Wear, 210, pp. 8–16.
ANSYS 5.7 Online Users Manual, 2001, ANSYS Inc.
Peterson, M. B., and Winer, W. O., 1980, Wear Control Handbook, ASME, New York.
Hamrock, B. J., 1976, “Elastohydrodynamic Lubrication of Point Contacts,” Ph.D. thesis, Institute of Tribology, Department of Mechanical Engineering, The University of Leeds.
Khonsari, M. M., and Booser, E. R., 2001, Applied Tribology, John Wiley and Sons Inc.
Bolz, R. E., and Tuve, T. L., 1970, CRC Handbook of Tables for Applied Engineering Science, 2nd ed., CRC Press.
Khonsari,  M. M., and Kim,  H. J., 1989, discussion on paper titled “Thermally Induced Seizures of Journal Bearings,” by K. Dufrane and J. Kannel, ASME J. Tribol., 111, p. 292.
Lacey,  S., and Kawamura,  H., 1998, “Bearings for Aircraft Gas Turbine Engines (Part 1),” NSK Technical Journal—Motion and Control,5, pp. 1–8.
Pascovici,  M. D., Khonsari,  M. M., and Jang,  J. Y., 1995, “On the Modeling of Thermomechanical Seizure,” ASME J. Tribol., 117, pp. 744–774.
Jang,  J. Y., Khonsari,  M. M., and Pascovici,  M. D., 1998, “Thermohydrodynamic Seizure: Experimental and Theoretical Analysis,” ASME J. Tribol., 120, pp. 8–15.

Figures

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Schematic of a journal bearing and its support structure
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Finite element model for thermal analysis, with loads and boundary conditions (not to scale)
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Finite element model for elastic analysis, with loads and boundary conditions
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Temperature rise as a function of time in a journal bearing during start up: (a) temperature rise, 25 seconds after starting; (b) temperature rise, 27 seconds after starting (note the ovalization and establishment of extra contact, A, at the top of bearing); and (c) temperature rise, 29 seconds after starting (note the formation of extra areas of contact and rapid temperature rise).
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Variation of contact forces with time during start-up
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Variation of frictional torque during start-up (note that the frictional torque increased to 50 times the initial frictional torque to indicate seizure)
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Comparison of seizure time with Dufrane and Kannel’s model and the present model. Note: n=heat partition factor.
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Variation of friction coefficient during lubricant perturbation
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Variation of convective heat transfer coefficient during lubricant perturbation
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(a–d) Plots of temperature rise during a transient flow disturbance
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Variation of contact force after the onset of ovalization due to flow disturbance
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Variation of frictional torque when a transient flow disturbance occurred

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