Rotary screw air compressor

GOVERNMENT POLYTECHNIC , VYARA

SUBJECT :- THERMAL ENGINEERING - 1

PRESENTATION SUBJECT :- ROTARY SCREW AIR COMPRESSOR

PREPARED BY :- JAYKUMAR R. SONAR

ENROLLMENT NO :- 149740319047

GUIDED BY :-

MR. A .V. KUNADIA

ROTARY SCREW AIR COMPRESSOR

in rotary screw air compressors, the most important part is the screw unit. For this reason they are called as rotary screw.

When compressor start running, firstly, it raises the compressor’s inside pressure approximately 1-2 bar.

It consist of two screws - one with convex and the other with concave contour mostly called male and female rotor respectively.

These two screws gets rotating by means of gear trips there by sucking the air through an inlet port in chamber and then compressing the same.

Thus compression begins and air is discharged at the end of other side.

There is no contact between male and female rotors and casing. Hence no lubrication require but oil may injected for the purpose of cooling.

DETAILS OF SCREW COMPRESSOR

The helix of the male and female rotor screw is designed to permit complete charging of the inter lobe space before the re-mesh.

On completion of the filling operation the inlet end of male and female lobes begins to re-engage thus reduces the volume of air continuously.

CLASSIFICATION OF AIR COMPRESSOR

There are many different types of rotary screw air compressors based on :-

1. Stages2. cooling method3. drive type.

COOLING METHODS :-

1. Oil-free compressors2. Oil-Injected Compressors

Advantages :-  Screw air compressors are designed as quiet

by the manufacturers.

More efficient than reciprocating compressors.

Screw air compressors can reach high capacities that piston compressors cannot.

These compressors are the high technology products.

If services done completely, they are long lived.

Disadvantages :-

Screw air compressors are more expensive than reciprocating air compressors.

Did you know?

  Rotary screw technology is the same

technology utilized by superchargers in high-performance engines !

THANK YOU