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TECHNICAL PAPERS

Preload Effects of a Guide Bearing on the Metal Temperature and the Shaft Vibration

[+] Author and Article Information
Hyun Cheon Ha

Research and Development Center, HANJUNG, Korea Heavy Industries and Construction Co., Ltd., 555 Guygok-Dong, Changwon, Kyungnam, 641-792, Koreae-mail: hcha@hanjung.co.kr

J. Tribol 123(1), 144-150 (Aug 01, 2000) (7 pages) doi:10.1115/1.1327587 History: Received February 02, 2000; Revised August 01, 2000
Copyright © 2001 by ASME
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References

Kanki, et al., 1992, “An Experimental Investigation of Fluid Exciting Force on a High Head Pump Turbine Runner,” Proceedings of the 4th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Honolulu, pp. 133–142.
Wilcock,  D. F., and Pinkus,  O., 1985, “Effects of Turbulence and Viscosity Variation on the Dynamic Coefficients of Fluid Film Journal Bearing,” ASME J. Tribol., 107, pp. 256–262.
Knight,  J. D., and Barret,  L. E., 1988, “Analysis of Tilting Pad Journal Bearings With Heat Transfer Effects,” ASME J. Tribol., 110, pp. 128–133.
Hopf,  G., and Schuler,  D., 1989, “Investigations on Large Turbine Bearings Working Under Transitional Conditions Between Laminar and Turbulent Flow,” ASME J. Tribol., 111, pp. 628–634.
Fillon,  M., Bligoud,  J., and Frene,  J., 1992, “Experimental Study of Tilting-Pad Journal Bearings: Comparison With Theoretical Thermoelastohydrodynamic Results,” ASME J. Tribol., 114, pp. 579–588.
Desbordes,  H., Fillon,  M., Wai,  C. C., and Frene,  J., 1994, “Dynamic Analysis of Tilying-Pad Journal Bearing: Influence of Pad Deformation,” ASME J. Tribol., 116, pp. 621–628.
Jone,  G. J., and Martin,  F. A., 1979, “Geometry Effects in Tilting Pad Journal Bearing,” ASLE Trans., 22, pp. 227–244.
Ha,  H. C., Kim,  H. J., and Kim,  K. W., 1995, “Inlet Pressure Effects on the Thermohydrodynamic Performance of a Large Tilting Pad Journal Bearing,” ASME J. Tribol., 117, pp. 160–165.
Qinghua, S., 1996, “Experimental Investigation of Frequency Characteristics of Draft Tube Pressure Pulsation for Francis Turbines,” Proceedings of the 18th IAHR Symposium on Hydraulic Machinery and Cavitation, Kluwer Academic, pp. 935–944.

Figures

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Schematic view of a hydraulic pump-turbine
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Photograph of the test bearing
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Configurations for preloading a pad: (a) non-preloaded (m=0.0); and (b) preloaded (m=0.87).
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Frequency spectra of the shaft vibration for 63 percent generating power: (a) non-preloaded (m=0.0); and (b) preloaded (m=0.87).
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Frequency spectra of the shaft vibration for 100 percent generating power: (a) non-preloaded (m=0.0); and (b) preloaded (m=0.87).
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Overall vibration amplitude measured at the preloaded bearing (m=0.87) versus generating power
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Comparison of the synchronous and subsynchronous whirl vibration measured at the preloaded bearing (m=0.87) versus generating power
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Sketch of the geometry of the eight-pad guide bearing
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Circumferential distribution of predicted film thickness in the mid-plane
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Circumferential distribution of predicted bearing metal temperature in the mid-plane
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Predicted bearing stiffness and bearing metal temperature

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