JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Note

Design Data Book is permitted. Design of all components should include design for strength and

rigidity apart from engineering performance requirements.

Pre-requisites

Study of engineering mechanics, design of machine members-I and theory of

machines.

Course objectives:

• To gain knowledge about designing the commonly used important machine members such as bearings, engine parts, springs, belts, gears etc.
• To design the components using the data available in design data books.

Course Outcomes:

• Knowledge about journal bearing design using different empirical relations.
• Estimation of life of rolling element bearings and their selection for given service conditions.
• Acquaintance with design of the components as per the standard, recommended procedures which is essential in design and development of machinery in industry.

UNIT - I

Sliding contact bearings: Types of Journal bearings – Lubrication – Bearing Modulus – Full and partial bearings – Clearance ratio – Heat dissipation of bearings, bearing materials – journal bearing design.

UNIT - II

Rolling contact bearings: Ball and roller bearings – Static load – dynamic load – equivalent radial load – design and selection of ball & roller bearings.

UNIT - III

Engine Parts: Connecting Rod: Thrust in connecting rod – stress due to whipping action on connecting rod ends –Pistons, Forces acting on piston – Construction, Design and proportions of piston.

UNIT - IV

Mechanical Springs: Stresses and deflections of helical springs – Extension and compression springs – Design of springs for fatigue loading – natural frequency of helical springs – Energy storage capacity – helical torsion springs – Design of co-axial springs, Design of leaf springs. Belts & Pulleys: Transmission of power by Belt and Rope Drives, Transmission efficiencies, Belts – Flat and V types – Ropes - pulleys for belt and rope drives.

UNIT - V

Gears: Spur gears& Helical gears- Brief introduction involving important concepts – Design of gears using AGMA procedure involving Lewis and Buckingham equations. Check for wear.

TEXT BOOKS:

• 1. Design of Machine Elements / Spotts/ Pearson
• 2. Machine Design / Pandya & Shah / Charothar

REFERENCE BOOKS:

• 1. Design of Machine Elements-II / Kannaiah / New Age R18 B.TECH MECHANICAL ENGG. III YEAR
• 2. Design of Machine Elements / Sharma and Purohit/PHI
• 3. Design Data Book/ P.V. Ramana Murti & M. Vidyasagar/ B.S. Publications
• 4. Design Data Handbook/ S. Md. Jalaludeen/ Anuradha Publishers R18 B.TECH MECHANICAL ENGG. III YEAR