CHHATTISGARH SWAMI VIVEKANAND TECHNICAL UNIVERSITY, BHILAI (C G)
Semester: B.E. VI Sem. Branch: Mechanical Engg.
Total Theory Periods: 50 Total Tutorial Periods: 12
Total Marks in End Semester Exam: 80
Minimum number of class tests to be conducted: 2
UNIT – I
Nature of surfaces and contact, surface topography, friction and wear mechanisms and effect of lubricants, methods
of fluid film formation.
Selection of rolling element bearings
Nominal life, static and dynamic capacity, equivalent load, probabilities of survival, cubic mean load, bearing
mounting details, preloading of bearings, condition monitoring using shock pulse method.
UNIT – II
Fundamentals of fluid film formation – Reynold’s equation; Hydrodynamic journal bearings – Sommerfeld number –
performance parameters – optimum bearing with maximum load capacity – friction – heat generated and heat
dissipated. Hydrodynamic thrust bearings: Raimondi and Boyd solution for hydrodynamic thrust bearings – fixed and
tilting pads, single and multiple pad bearings – optimum condition with largest minimum film thickness.
UNIT – III
Thrust bearings – pad coefficients – restriction – optimum film thickness – Journal bearings – design procedures.
Aerostatic bearings: thrust bearings and journal bearings, design procedure.
Dry rubbing bearings
Porous metal bearings and oscillatory journal bearings, qualitative approach only.
UNIT – IV
Choice of lubricant type, oil, grease and solid lubricants, additives, lubrication systems and their selection, selection
of pump, filters, piping design, oil changing and oil conservation.
UNIT – V
Different types, mechanical seals, lip seals, packed glands, soft piston seals, mechanical piston rod packing,
labyrinth seals and throttling bushes, oil flinger rings and drain grooves, selection of mechanical seals.
Failure of tribological components
Failure analysis of plain bearings, rolling bearings, gears and seals, wear analysis using SOAP and Ferrography.
1. Fundamentals of Tribology – S.K. Basu, S.N. Sengupta & B.B. Ahuja – PHI
2. Engineering Tribology – Prasanta Sahoo – PHI
1. Tribology Handbook – Neale M J – Neumann Butterworths, 1975
Standard handbook of lubrication engineers – J J O’ Connor & Boyd – ASLE, McGraw Hill Book Co., 1968
2. Hydrostatic and Hybrid Bearing Design – Rowe W W & O’ Dionoghue – Butterworths & Co. Publishers Ltd,