All types of machines require power to reach working conditions and the elements, which are used to transfer these powers are known as elements of power transmission. These elements are also useful in transferring the rotatory motion generated by the machine (prime mover) to the different parts of a machine. In the workshops and industries, a prime mover is required to operate the machine. The electric motor or diesel engine is used as a prime mover. The power is obtained by the electric motor or diesel engine in the form of rotatory motion on the prime mover shaft. This power (rotatory motion) is transmitted from one shaft to another with the help of belts, chains, gears, clutches, etc.
Here, power is transferred by the prime mover with the help of the elements stated above. So, here we will be discussing some elements of power transmission such as belts, chains, gears, etc. Before discussing these elements let’s take an overview of their applications.
The belts and ropes are flexible members, which are used where the distance between the two shafts is large. The chains also have flexibility but they are preferred for intermediate distance. Gears are used when the shafts are very close to each other. So, in this chapter, we will study the various types of drives, which are used in power transmission.
Methods of Power Transmission
The process of transfer of energy from one place to another place or from one device to another device is known as power transmission. There are two methods of power transmission. These are discussed below.
1. Common Drive
Under the common drive system, power developed by the prime mover is transferred to the main shaft and transmitted to different machines. In these states, an electric motor of full horsepower is required to run all machines. A fast and loose pulley is used to run or close the machines according to the requirement.
In this system, the loss of more power has occurred and more area is occupied. This system was used in the early period and returned due to various deficiencies.