Tribology is related to friction, wear and lubrication of machine elements. Tribology not only deals with the design of fluid containment systems like seals and gasket but also with the lubrication of surfaces in relative motion. This book comprehensively discusses the theories and applications of hydrodynamic thrust bearing, gas (air) lubricated bearing and elasto-hydrodynamic lubrication. It elucidates the concepts related to friction, including coefficient of friction, friction instability and stick-slip motion. It clarifies the misconception that harder and cleaner surfaces produce better results in wear. Recent developments, including online condition monitoring (an integration of moisture sensor, wear debris and oil quality sensors) and multigrid technique, are discussed in detail. The book also offers design problems and their real-life applications for cams, followers, gears and bearings. MATLAB programs, frequently asked questions and multiple choice questions are interspersed throughout for easy understanding of the topics.
Harish Hirani received his PhD from the Indian Institute of Technology, Delhi. He was a visiting researcher at Massachusetts Institute of Technology, USA, from 2003 to 2004. He has published nearly 35 papers in national and international journals. His areas of interest are semi-active magneto rheological bearing, rolling element bearing, hydrodynamic bearing and seals.
List of figures; List of tables; Preface; Acknowledgement; Nomenclature; 1. Introduction; 2. Friction, wear and boundary lubrication; 3. Lubrication of bearings; 4. Hydrodynamic thrust bearing; 5. Hydrostatic and squeeze film lubrication; 6. Elasto-hydrodynamic lubrication; 7. Gas (air) lubricated bearings; 8. Mixed lubrication; 9. Tribological aspects of rolling motion; 10. Tribological aspects of gears; Index.