CHAPTER 21

V-Belt Drive

Chapter Objectives

  1. List the merits and demerits of the V-belt drive over the flat belt drive.

  2. List the properties of five sections of the V-belt.

  3. Determine the power rating of a V-belt.

  4. Determine the design power of a V-belt.

  5. Determine the length of a V-belt for an open-belt drive.

  6. Determine the standard pitch length of a V-belt.

  7. Determine the speed of the faster pulley from the design power of a V-belt.

  8. Determine the ratio of belt tensions for a V-belt.

21-1 INTRODUCTION

A V-belt runs into the grooves of pulleys. The resulting wedge action greatly improves the frictional force between belt and pulley. In a flat belt, the coefficient of friction μ is increased to μ cosec β (between the V-belt and the pulley) where, ...

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