BE Mechanical 2003 Structure - K. K. Wagh Education Society

Basic concept, operations, advantages and limitations. Hydrostatic conical and
spherical bearings, load carrying capacity and flow of lubricants. Bearing power
and film thickness, bearing temperature and power. Compensators and their
action. Optimum design of step bearing.
6. Hydrodynamic bearings:
Theory of hydrodynamic lubrication. Mechanism of pressure development in oil
film. Two-dimensional Reynolds eq1.lation. Infinite tapered shoe slider bearings
and infinite long journal bearing; Short bearing theory applied to journal bearing.
7. Friction and power losses in journal bearing:
Ratio of heat conducted, temperature rise approximate and rapid methods, design
considerations.
8. Hydrodynamic Thrust bearing:
Introduction, flat, plate thrust bearing, pressure equation, load, center of pressure.
Tapered land thrust bearing, step thrust bearing, tilting pad thrust bearing.
Friction in tilting pad thrust bearing.
9. Hydrostatic squeeze film:
Circular and Rectangular plates, impact conditions between lubricated solids,
Application to journal bearing.
10. Lubrication in special conditions:
Forging, wire drawings extrusion, rolling. Lubricants used for wire ropes.