Properties of oils and equation of flow: Viscosity, Newton’s Law of viscosity, Hagen-Poiseuille Law, Flow between parallel stationary planes, viscosity measuring apparatus. Lubrication principles, classification of lubricants.
Friction forces and power loss in lightly loaded bearing, Petroff’s law, Tower’s experiments, idealized full journal bearings.
Reynold’s investigations, Reynold’s equation in two dimensions. Partial journal bearings, end leakages in journal bearing, numerical problems.
Pressure distribution, Load carrying capacity, coefficient of friction, frictional resistance in a pivoted shoe bearing, influence of end leakage, numerical examples.
Oil flow through bearings, self-contained journal bearings, bearings lubricated under pressure, thermal equilibrium of journal bearings.
Introduction to hydrostatic lubrication, hydrostatic step bearings, load carrying capacity and oil flow through the hydrostatic step bearing.
Commonly used bearings materials, properties of typical bearing materials. Wear: Classification of wear, wear of polymers, wear of ceramic materials, wear measurements, effect of speed, temperature and pressure.
Selection, friction, Wear of ceramic materials, wear measurements, effects of speed, temperature and pressure. Tribological measures, Material selection, improved design, surface engineering