Hydraulics and Pneumatics: Unit IV: Pneumatic and Electro Pneumatic Systems

compressors

Pneumatic and Electro Pneumatic Systems - Hydraulics and Pneumatics

A compressor is a device used to compress air (or any gas) from a low inlet pressure (usually atmospheric pressure) to a higher desired pressure level.

COMPRESSORS

1. What is a Compressor ?

A compressor is a device used to compress air (or any gas) from a low inlet pressure (usually atmospheric pressure) to a higher desired pressure level.

In pneumatic systems, compressors are used to compress and supply the required quantities of air.

As per the laws of perfect gas, the compressor increases the pressure of the air by reducing its volume.

2. Types of Air Compressors

There are two basic types of compressors, based on their method of energy transfer and pressure generation. They are :

1. Positive displacement compressors, and

2. Dynamic type compressors.

Positive displacement compressors work on the principle of increasing the pressure of a definite volume of air by reducing that volume in an enclosed chamber.

Dynamic compressors, also known as turbo compressors, employ rotating vanes or impellers to increase the pressure of the air.

The detailed sub-classification of compressors are presented in Fig.11.1.


However, the study of piston-, screw-, and vane-type compressors are more important from our subject point of view.

Hydraulics and Pneumatics: Unit IV: Pneumatic and Electro Pneumatic Systems : Tag: : Pneumatic and Electro Pneumatic Systems - Hydraulics and Pneumatics - compressors