UNIT I - DESIGN OF TRANSMISSION SYSTEMS FOR FLEXIBLE ELEMENTS
Selection of V belts and pulleys – selection of Flat belts and pulleys - Wire ropes and pulleys.
Selection of Transmission chains and Sprockets. Design of pulleys and sprockets.
UNIT II - SPUR GEARS AND PARALLEL AXIS HELICAL GEARS
Gear Terminology-Speed ratios and number of teeth-Force analysis -Tooth stresses - Dynamic effects - Fatigue strength - Factor of safety - Gear materials – Module and Face width-power rating calculations based on strength and wear considerations.
Parallel axis Helical Gears – Pressure angle in the normal and transverse plane- Equivalent number of teeth-forces and stresses. Estimating the size of the helical gears.
UNIT III - BEVEL, WORM AND CROSS HELICAL GEARS
Straight bevel gear: Tooth terminology, tooth forces and stresses, equivalent number of teeth. Estimating the dimensions of pair of straight bevel gears.
Worm Gear: Merits and demerits- terminology. Thermal capacity, materials-forces and stresses, efficiency, estimating the size of the worm gear pair.
Cross helical: Terminology-helix angles-Estimating the size of the pair of cross helical gears.
UNIT IV - DESIGN OF GEAR BOXES
Geometric progression - Standard step ratio - Ray diagram, kinematics layout -Design of sliding mesh gear box -Constant mesh gear box. – Design of multi speed gear box.
UNIT V - DESIGN OF CAM CLUTCHES AND BRAKES
Cam Design: Types-pressure angle and under cutting base circle determination-forces and surface stresses.
Design of plate clutches –axial clutches-cone clutches-internal expanding rim clutches- internal and external shoe brakes.