22 May 2017

Advantages and disadvantages of V-belt drive

The V-belt drive is also called a friction drive. The shape of the V-belt is somewhat trapezoidal. The pulleys also have tapered sides forming v groove in which the belt sits thus V-belt does not get many possibilities to slide away from the pulleys. Let us have a deep insight into the pros and cons of V-belt drive in this article. 

Advantages of V-belt drive :

  • Positive drive as slip between belt and pulley is negligible.
  • No joint troubles as V-belt are made endless.
  • Operation is smooth and quiet.
  • High-velocity ratio up to 10 can be obtained.
  • It can be easily installed and removed.
  • Due to wedging action in the grooves, limiting ratio of tensions is higher and thus, more power transmission.
  • It may be operated in either direction with a tight side at the top or bottom.
  • Multiple V-belt drives increase the power transmission manifold.
  • Slip between the belt and the pulley is negligible.
  • The axis can be vertical or horizontal or inclined.
  • They can dampen vibration.

Disadvantages of V-belt drive :

  • It can not be used for large centre distances.
  • In V-belt construction of pulleys is not simple.
  • V-belt is not as durable as a flat belt.
  • It costlier as compared to the flat belt.
  • V-belt drive can't be used for long distances due to a greater weight per unit of length.
  • It may be not applicable to synchronous machines because they are not free from creep.
  • The centrifugal tension prevents the use of belts at speeds below 5 m/s and above 50 m/s.