Transmission Of Power By Belt And Rope Drives

Rope drives use a number of circular section ropes rather than a single flat or vee belt.

Transmission of power by belt and rope drives.

The following are the major types of power transmission. The power at which the belt slips is not the absolute maximum power that can be transmitted as more power can be transmitted with slippage occurring by using higher wheel speeds. It may be noted that the use of flat belts is limited for the transmission of moderate power from one pulley to another when the two pulley is not more than 8 metres apart. Rope drive do not mistaken with round belt is used where a large amount of power is needed to transfer for a long distance more than 8m.

The rope runs over a grooved pulley. Advantages of the rope drive. E g elevator lift overhead crane hoist ropeway etc. Compared to other mode power transmission they have a short life service.

In most cases the power transmitted relies upon the friction between the rope or belt and the rim of the pulley. Angular velocity of belt drives isn t constant. Typically its operating temperatures are restricted to 35 to 85 c. Problem 1 based on belt drive video lecture from chapter power transmission in theory of machine for mechanical engineering students watch next videos of ch.

The power transmitted by a v belt drive and be increased by operating with several belts placed side. When the center distance between the driver and driven shaft is very large and higher power is required to be transmitted rope drives are used. Appropriate size and number of grooves are provided on the pulley rim. Pulleys are mounted on the driver and driven follower shafts and an endless belt are fitted tightly over these pulleys.

The friction between the belt and the wheel is further affected by centrifugal force which tends to lift the belt off the wheel. Flywheel and rope drum of the large mill engines victoria and alexandra at ellenroad mill. Where power has to be transmitted between two shafts which are a distance apart a belt or rope drive is frequently used. This form of drive is used extensively in all classes of machinery transmitting power from 0 5 kw up to 150kw.

Rope drives use a number of circular section ropes rather than a single flat or vee belt. Here instead of a belt wire rope is used. It has limited power transmission of up to 370 kw which increases the heat build up. This leads to stretching slipping and wearing of belt.

Advantages and disadvantages of the v belt drive over a flat belt drive. A rope drive is a form of belt drive used for mechanical power transmission.