Folks
If anyone is interested, I have recently derived an equation for the friction loss of a journal bearing under highly loaded conditions. You may be aware that under low loads, a simple equation, known as the Petroff equation, is used for estimating the friction force. The equation I have derived applies for high loads, and is obtained by considering the short bearing approximation in the limit that the eccentricity ratio goes to zero. I also obtain simple expressions for the minimum oil film thickness and peak pressure. For details see the following web link:
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The above paper will be published, very soon, in a UK journal, Proceedings of the Institution of Mechanical Engineers, Part J, Journal of Engineering Tribology Hope this is of interest
Ian Taylor
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