Abstract
Two recurring questions relating to the performance of dynamically-loaded engine bearings are:
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1)
How reliable are the calculated oil-film thicknesses, considering the fairly high bearing deformations? In practical engine bearings the ideal circular shape deforms appreciably under the working loads. In calculating the oil-film thicknesses, however, the ideal circular form is almost invariably assumed. Should it not be concluded that such calculations give misleading results?
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2)
The most important property of a lubricant is its viscosity, which is heavily dependent on temperature. Do the temperature differences which exist around the circumference of an engine bearing demand an improvement on conventional isothermal theory for dynamically-loaded engine bearings?
This lecture gives some answers to these questions, provided by research work carried out on an automotive petrol engine and on a marine diesel engine.
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References
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GOODWIN, G. and HOLMES, R. 1975 J. Automotive Engng. 6(3), 6–10. Determination of oil film thickness in a crankshaft main bearing.
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© 1990 Kluwer Academic Publishers
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Holmes, R. (1990). On Bearing Deformation and Temperature Distribution in Dynamically-Loaded Engine Bearings. In: Montalvão e Silva, J.M., Pina da Silva, F.A. (eds) Vibration and Wear in High Speed Rotating Machinery. NATO ASI Series, vol 174. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-1914-3_22
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DOI: https://doi.org/10.1007/978-94-009-1914-3_22
Publisher Name: Springer, Dordrecht
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