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Tuesday, 31 March 2015

Advantages and Disadvantages of V-belt Drive over Flat Belt Drive

Advantages and Disadvantages of V-belt Drive over Flat Belt Drive Points : Advantages and Disadvantages of V-belt Drive over Flat Belt Drive Advantages
  1. Wedging exploit of belt in channel gives elevated value of preventive ratio of tensions. Then power transmitted through V-belts is over flat belts for equal coefficient of friction, arc of contact and permissible tension in belts.
  2. As V-belts are prepared endless and there is no joint difficulty, thus the drive is smooth.
  3. V-belt can be operate in also direction, by tight side of belt at the top or bottom. The centre line can be horizontal, vertical or inclined.
  4. V-belt drive provides solidity due to small distance among centres of pulleys.
  5. Belts have capability to cushion shock as machines are started.
  6. High velocity percentage (maximum 10) can be obtain.
  7. Drive is constructive, as the slip between belt and the pulley groove is minor.
  8. It can be simply installed and removed.
  9. Operation of belt and pulley is quiet.
  10. It gives longer life, 4 to 5 years.
Disadvantages
  1. As the V-belts are subjected to definite sum of creep, therefore these are not proper for constant speed applications for example synchronous machines and timing devices.
  2. Centrifugal tension prevents the use of V-belts at speeds below 5m/s and over 50 m/s.
  3. V-belt drive cannot be use by large centre distances, as of larger weight per unit length.
  4. Belt life is deeply influenced by temperature changes, shocking belt tension and mismatching of belt lengths.
  5. Construction of pulleys for V-belts is more difficult than pulleys of flat belts.
  6. V-belts are not so durable as flat belts.

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