Transcription of UNIT 3 POWER TRANSMISSION DEVICES Power …
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UNIT 3 POWER TRANSMISSION DEVICES Power …
79 POWER TRANSMISSION DEVICES UNIT 3 POWER TRANSMISSION DEVICES Structure Introduction Objectives POWER TRANSMISSION DEVICES Belts chain Gears TRANSMISSION Screw POWER TRANSMISSION by Belts Law of Belting Length of the Belt Cone Pulleys Ratio of Tensions POWER Transmitted by Belt Drive Tension due to Centrifugal Forces Initial Tension Maximum POWER Transmitted Kinematics of chain Drive Classification of Gears Parallel Shafts Intersecting Shafts Skew Shafts Gear Terminology Gear Train Simple Gear Train Compound Gear Train POWER Transmitted by Simple Spur Gear Summary Key Words Answers to SAQs INTRODUCTION The POWER is transmitted from one shaft to the other by means of belts, chains and gears.
The construction of this type of chain is shown in the figure. The roller is made of steel and then hardened to reduce the wear. A good roller chain is quiter in operation as compared to the block chain and it has lesser wear. The block chain is shown in Figure 3.4(a). It is used for low speed drive. The inverted tooth chain is shown in
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