Thrust Bearing with Rough Surfaces Lubricated by an Ellis Fluid
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University of Zielona Góra, Faculty of Mechanical Engineering ul. Szafrana 2, 65-516 Zielona Góra, Poland
University of Zielona Góra, Faculty of Mechanical Engineering ul. Szafrana 2, 65-516 Zielona Góra, Poland J.Falicki@ibem.uz.zgora.pl
Online publication date: 2014-12-30
Publication date: 2014-11-01
International Journal of Applied Mechanics and Engineering 2014;19(4):809-822
In the paper the influence of bearing surfaces roughness on the pressure distribution and load-carrying capacity of a thrust bearing is discussed. The equations of motion of an Ellis pseudo-plastic fluid are used to derive the Reynolds equation. After general considerations on the flow in a bearing clearance and using the Christensen theory of hydrodynamic rough lubrication the modified Reynolds equation is obtained. The analytical solutions of this equation for the cases of a squeeze film bearing and an externally pressurized bearing are presented. As a result one obtains the formulae expressing pressure distribution and load-carrying capacity. A thrust radial bearing is considered as a numerical example.
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