ME2352 DESIGN OF TRANSMISSION SYSTEMS Syllabus

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OBJECTIVE:
 To gain knowledge on the principles and procedure for the design of power
Transmission components. To understand the standard procedure available for
Design of Transmission sip terms To learn to use standard data and catalogues
UNIT I DESIGN OF TRANSMISSION SYSTEMS FOR FLEXIBLE ELEMENTS 9
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 9
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 9
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 9
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 9
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 clutchesinternal
and external shoe brakes.
TUTORIALS: 15 TOTAL: 60 PERIODS
NOTE: (Usage of P.S.G Design Data Book is permitted in the University examination)
TEXT BOOKS:
1. Shigley J.E and Mischke C. R., “Mechanical Engineering Design”, Sixth Edition, Tata
McGraw-Hill , 2003.
2. Sundararajamoorthy T. V, Shanmugam .N, "Machine Design", Anuradha
Publications, Chennai, 2003.
REFERENCES:
1. Maitra G.M., Prasad L.V., “Hand book of Mechanical Design”, II Edition, Tata
McGraw-Hill, 1985.
2. Bhandari, V.B., “Design of Machine Elements”, Tata McGraw-Hill Publishing
Company Ltd., 1994.
3. Prabhu. T.J., “Design of Transmission Elements”, Mani Offset, Chennai, 2000,
4. Hamrock B.J., Jacobson B., Schmid S.R., “Fundamentals of Machine Elements”,
McGraw-Hill Book Co., 1999.
5. Ugural A,C, "Mechanical Design, An Integrated Approach", McGraw-Hill , 2003.
STANDARDS:
1. IS 4460 : Parts 1 to 3 : 1995, Gears – Spur and Helical Gears – Calculation of Load
Capacity.
2. IS 7443 : 2002, Methods of Load Rating of Worm Gears
3. IS 15151: 2002, Belt Drives – Pulleys and V-Ribbed belts for Industrial applications –
PH, PJ, PK, Pl and PM Profiles : Dimensions
4. IS 2122 : Part 1: 1973, Code of practice for selection, storage, installation and
maintenance of belting for power transmission : Part 1 Flat Belt Drives.
5. IS 2122: Part 2: 1991, Code of practice for selection, storage, installation and
maintenance of belting for power transmission : Part 2 V-Belt Drives.