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A Theory of Liquid-Solid Hydrodynamic Film Lubrication

1966; Taylor & Francis; Volume: 9; Issue: 3 Linguagem: Inglês

10.1080/05698196608972143

2375-1444

H. Grady Rylander,

Lubricants and Their Additives

This investigation was undertaken for tile purpose of extending the design theories for hydrodynamic bearings to include the effects of solid particles in a liquid base lubricant. A set of nonlinear, coupled partial differential equations is developed to include the effects of the solid particles. Solutions of the mathematical model by numerical analysis are compared to the results obtained in actual bearing tests with a universal bearing test machine. Increased friction from the solids is shown to be limited to a certain range of operation such that at Sommerfeld numbers above or below this range there is only a slight increase in the friction above that obtained with the liquid alone. Good agreement between the theoretical solutions and experimental values was obtained by using experimentally determined particle shear strengths.