Tech Lic. Me 54, Acta Polytechnica Scandinavica. Stockholm 1970

Abstract:

Lubrication of a point contact between two spheres is studied . The viscosity of the oil is assumed to vary with pressure and temperature. The oil is assumed to be solidified above a certain pressure, which is dependent on the temperature. The solidified oil is assumed to have a shear strength independent of pressure and temperature. Continuity conditions for the cavitation boundary, the boundary between liquid oil and solidified oil, and the boundary between sliding and non-sliding solidified oil are given. Numerical calculations of height functions, pressure distributions, and load capacities are made for the isothermal case.

An experimental investigation of the oil film thickness in a rolling point contact is carried out. There is good agreement between theory and tests.

The shear strength of solidified oil has been experimentally determined.