This paper evaluates two different journal bearings: a cylindrical bore plain journal bearing and a tri-lobe taper land bearing. Each bearing has the same nominal diameter (89mm) and aspect ratio (L/D = 0.7). The shaft rotational speed ranged from 6krpm to 14krpm and the bearing specific load from 700kPa to 2800kPa. The bearings’ steady-state performance is evaluated according to relative bearing and shaft displacement, bearing operating temperature and power loss. A frequency-domain analysis is used to determine bearing rotordynamic coefficients — it treats the bearing as a mass-spring-damper system. Excitation frequencies range between 20Hz and 350Hz. Ultimately, the tri-lobe taper land bearing offers better stability whereas the cylindrical bore plain journal bearing has a lower eccentricity and runs cooler for a given operating condition. The dynamic properties of the two bearings are found to be similar, although the higher stability of the tri-lobe taper land bearing is also reflected in the dynamic coefficients.
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ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition
June 6–10, 2011
Vancouver, British Columbia, Canada
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5466-2
PROCEEDINGS PAPER
Comparison of the Steady-State and Dynamic Performance of Two Fixed-Geometry Journal Bearings
Martin J. Conlon,
Martin J. Conlon
National Research Council Canada, Ottawa, ON, Canada
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Azzedine Dadouche,
Azzedine Dadouche
National Research Council Canada, Ottawa, ON, Canada
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Waldemar M. Dmochowski
Waldemar M. Dmochowski
National Research Council Canada, Ottawa, ON, Canada
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Martin J. Conlon
National Research Council Canada, Ottawa, ON, Canada
Azzedine Dadouche
National Research Council Canada, Ottawa, ON, Canada
Waldemar M. Dmochowski
National Research Council Canada, Ottawa, ON, Canada
Paper No:
GT2011-46761, pp. 685-694; 10 pages
Published Online:
May 3, 2012
Citation
Conlon, MJ, Dadouche, A, & Dmochowski, WM. "Comparison of the Steady-State and Dynamic Performance of Two Fixed-Geometry Journal Bearings." Proceedings of the ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. Volume 6: Structures and Dynamics, Parts A and B. Vancouver, British Columbia, Canada. June 6–10, 2011. pp. 685-694. ASME. https://doi.org/10.1115/GT2011-46761
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