belt rope and chain drive (1).pdf basic mechanical engineering
- 1. ENGINEERING MECHANICS TOPIC -BELT DRIVE BY Dr. MANOJ SHARMA ASSOCIATE PROFESSOR ME DEPARTMENT
- 2. WHY WE USE THE BELTS The belts or *ropes are used to transmit power from one shaft to another by means of pulleys which rotate at the same speed or at different speeds. The amount of power transmitted depends upon the following factors : 1. The velocity of the belt. 2. The tension under which the belt is placed on the pulleys. 3. The arc of contact between the belt and the smaller pulley. 4. The conditions under which the belt is used.
- 3. TYPES OF BELT 1. Flat belt. The flat belt as shown in Fig.(a), is mostly used in the factories and workshops, where a moderate amount of power is to be transmitted, from one pulley to another when the two pulleys are not more than 8 meters apart.
- 4. TYPES OF BELT V- belt. The V-belt as shown in Fig.(b), is mostly used in the factories and workshops, where a great amount of power is to be transmitted, from one pulley to another, when the two pulleys are very near to each other. Circular belt or rope. The circular belt or rope as shown in Fig.(c) is mostly used in the factories and workshops, where a great amount of power is to be transmitted, from one pulley to another, when the two pulleys are more than 8 meters apart.
- 5. TYPES OF FLAT BELT DRIVE OPEN OR SIMPLE BELT DRIVE CROSSED OR TWIST BELT DRIVE
- 6. TYPES OF FLAT BELT DRIVE COMPOUND BELT DRIVE
- 7. VELOCITY RATIO OF SIMPLE BELT DRIVE
- 8. VELOCITY RATIO OF COMPOUND BELT DRIVE
- 9. SLIP OF THE BELT
- 10. SLIP OF THE BELT
- 11. CREEP OF BELT
- 12. NUMERICAL
- 13. NEMERICAL
- 14. LENGTH OF OPEN BELT DRIVE
- 15. LENGTH OF OPEN BELT DRIVE
- 16. LENGTH OF OPEN BELT DRIVE
- 17. LENGTH OF CROSS BELT DRIVE
- 18. LENGTH OF CROSS BELT DRIVE
- 19. LENGTH OF CROSS BELT DRIVE
- 20. POWER TRANSMITTED BY BELT
- 21. TENSION RATIO OF FLAT BELT DRIVE
- 22. TENSION RATIO OF FLAT BELT DRIVE
- 23. TENSION RATIO OF FLAT BELT DRIVE
- 24. NUMERICAL
- 25. NUMERICAL
- 29. MAXIMUM TENSION IN THE BELT
- 30. CONDITION OF TRANSMISSION OF MAXIMUM POWER
- 31. CONDITION OF TRANSMISSION OF MAXIMUM POWER
- 32. NUMERICAL
- 33. NUMERICAL
- 34. NUMERICAL
- 35. NUMERICAL
- 36. NUMERICAL
- 37. NUMERICAL
- 39. INITIAL TENSION IN BELT
- 40. NUMERICAL
- 42. GEAR DRIVE A gear drive is also provided, when the distance between the driver and the follower is very small. A gear may be defined as a pulley or wheel having projections on its rim known as teeth or cogs. Sometimes, a pulley is casted with teeth on its rim. But, sometimes the teeth are cut on the rim of the pulley.
- 51. CHAIN DRIVE We have seen in belt and rope drives that slipping may occur. In order to avoid slipping, steel chains are used. The chains are made up of rigid links which are hinged together in order to provide the necessary flexibility for warping around the driving and driven wheels. The wheels have projecting teeth and fit into the corresponding recesses, in the links of the chain. The wheels and the chain are thus constrained to move together without slipping and ensures perfect velocity ratio. The toothed wheels are known as sprocket wheels or simply sprockets. These wheels resemble to spur gears
- 52. The chains are mostly used to transmit motion and power from one shaft to another, when the distance between the centers of the shafts is short such as in bicycles, motor cycles, agricultural machinery, road rollers, etc.
- 54. TERMS USED IN CHAIN DRIVE
- 56. CLASSIFICATION OF CHAINS 1. Hoisting and hauling (or crane) chains, 2. Conveyor (or tractive) chains 3. Power transmitting (or driving) chains.
- 57. 1. HOISTING AND HAULING CHAINS
- 59. 3. POWER TRANSMITTING CHAINS