7/28/2019 DTS SYLLABUS12122011.docx

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DESIGN OF TRANSMISSION SYSTEMS 3 2 0 100 5

UNIT I TRANSMISSION SYSTEMS USING FLEXIBLE ELEMENTS 9

Selection of V belts and pulleys selection of Flat belts and pulleys Selection of Transmissionchains and Sprockets. Design of pulleys and sprocketsUNIT 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-powerrating calculations based on strength and wear considerations - Parallel axis Helical GearsPressure angle in the normal and transverse plane- Equivalent number of teeth-forces andstresses. Estimating the size of the helical gears.UNIT III BEVEL AND WORM GEARS 9

Straight and spiral bevel gear: Tooth terminology, tooth forces and stresses, equivalent number ofteeth. Estimating the dimensions of pair of straight and spiral bevel gears.Worm Gear: Merits and demerits- terminology. Thermal capacity, materials-forces and stresses,efficiency, estimating the size of the worm gear pair.UNIT IV DESIGN OF GEAR BOXES 9

Geometric progression - Standard step ratio - Ray diagram, kinematics layout - Design ofsliding mesh gear box -Constant mesh gear box. Design of multi speed gear box.UNIT V DESIGN OF POWER SCREWS, CLUTCHES AND BRAKES 9

Types of screw threads used for power screws Torque requirements Stresses in Powerscrews, Design of Screw Jack.Design of plate clutches axial clutches - cone clutches - internal expanding rim clutchesTypes of brakes and their applications Design of internal and external shoe brakes.LECTURE : 45

TUTORIAL : 30

TOTAL : 75

Note: (Usage of P.S.G Design Data Book is permitted in the University examination)TEXT BOOKS

1 Juvinall R. C., Marshek K.M., Fundamentals of Machine component Design, John Wiley& Sons Third Edition, 2002.2 Bhandari, V.B., Design of Machine Elements, Tata McGraw-Hill Publishing Company Ltd.,1994.REFERENCES

1 Maitra G.M., Prasad L.V., Hand book of Mechanical Design, II Edition, Tata McGraw-Hill,19852 Shigley J.E and Mischke C. R., Mechanical Engineering Design, McGraw-Hill InternationalEditions, 19893 Norton R.L, Design of Machinery, McGraw-Hill Book co, 2004.4 Hamrock B.J., Jacobson B., Schmid S.R., Fundamentals of Machine Elements, McGraw-Hill Book Co., 1999.STANDARDS

1 IS 4460 : Parts 1 to 3 : 1995, Gears Spur and Helical Gears Calculation of LoadCapacity2 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 : Dimensions4 IS 2122 : Part 1: 1973, Code of practice for selection, storage, installation and maintenanceof belting for power transmission : Part 1 Flat Belt Drives.5 IS 2122: Part 2: 1991, Code of practice for selection, storage, installation and maintenanceof belting for power transmission: Part 2 V-Belt Drives.