Transcription of Unit 4: Mechanical Principles - FREE STUDY
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Unit 4: Mechanical Principles - FREE STUDY
unit 4: Mechanical Principles unit code: F/601/1450 QCF level: 5 Credit value: 15 OUTCOME 3 POWER TRANSMISSION TUTORIAL 1 BELT DRIVES 3 Power Transmission Belt drives: flat and v-section belts; limiting coefficient friction; limiting slack and tight side tensions; initial tension requirements; maximum power transmitted Friction clutches: flat single and multi-plate clutches; conical clutches; coefficient of friction; spring force requirements; maximum power transmitted by constant wear and constant pressure theories; validity of theories Gear trains: simple, compound and epicycle gear trains; velocity ratios; torque, speed and power relationships; efficiency; fixing torques On completion of this tutorial you should be able to S
D.J.Dunn www.freestudy.co.uk 3 1. INTRODUCTION Pulley drive systems depend on friction to enable the belt to grip the wheel and pull it around with it.
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