Lesson 3 types of compressor_Neat

Types of Air Compressors













Reciprocating

single stage piston Diaphragm Screw
compressors compressor compressor



1 3 5















2 4



Reciprocating Sliding vane

double stage
piston compressor




CHAPTER 1 : INTRODUCTION TO PNEUMATIC SYSTEM

Types of air compressors













TYPES OF
COMPRESSOR






RECIPROCATING ROTARY COMPRESSOR FLOW COMPRESSOR

PISTON COMPRESSOR







PISTON COMPRESSOR DIAPHRAGM RADIAL-FLOW AXIAL-FLOW
( 1 stage & 2 stage piston) COMPRESSOR COMPRESSOR COMPRESSOR








SLIDING VANE ROTARY TWO AXIAL SCREW

COMPRESSOR COMPRESSOR SCREW COMPRESSOR





CHAPTER 1 : INTRODUCTION TO PNEUMATIC SYSTEM

Reciprocating Air Compressors









1.
2.
One of the main parts that convert Reciprocating air compressors
mechanical to pneumatic energy in
piston compressors is the piston. The are positive displacement machines,

piston performs linear reversible where they increase the pressure of the
motion in the compressor cylinder. air by reducing its volume.




3.
Major types of reciprocating

compressors include reciprocating
single stage piston compressor,

reciprocating double stage piston
compressor, and reciprocating Click here to watch how a
diaphragm.
single stage reciprocating

compressor works.









CHAPTER 1 : INTRODUCTION TO PNEUMATIC SYSTEM

Reciprocating single stage piston compressors









For a single-stage compressor, air from

atmosphere is drawn and compressed to final

pressure in one stroke.







The downward movement of the piston

increases the volume to produce a pressure
lower than atmospheric pressure, thereby

allowing air to enter the cylinder through the

intake valve.





At the end of the stroke, the piston moves

upward, as the air is compressed, the intake
valve closes, forcing the exhaust valve to

open, and the air is discharged into the

receiving tank.


CHAPTER 1 : INTRODUCTION TO PNEUMATIC SYSTEM

Reciprocating double stage piston compressor







The air sucked in at atmospheric pressure is compress

ed to the final pressure in two stages.




The compressed air enters the secondary cylinder aft

er passing through the intercooler, and the temperatu

re is greatly reduced. Compared with the single-stage
unit, the efficiency is improved. The final delivering

temperature can be around 120°C.





Single-stage and two-stage reciprocating

compressors are often used in car and truck repair

shops, body repair shops, service companies, and

industrial plants. Although this type of compressor is Click here to watch comparisons

usually oil-lubricated, hospitals and laboratories can between single and double stage
compresstor
purchase oil-free compressors





CHAPTER 1 : INTRODUCTION TO PNEUMATIC SYSTEM

Sliding vane








1. When the rotor rotates, the blades slide out against the

housing. As the rotor rotates in an eccentric cylinder, air
compression occurs when the volume of the space between

the sliding blades decreases.



2. This type of compressor may or may not be lubricated by oil.

Due to high operating temperature and difficult sealing, oil-

free rotary vane compressors are limited to low-pressure

applications. The oil-lubricated version can obtain higher

pressures.
Click here to watch
comparisons
3. Some of the advantages of rotary sliding vane compressors between single and

are smooth and pulse-free air output, compact size, low double stage

noise levels, and low vibration levels. compresstor










CHAPTER 1 : INTRODUCTION TO PNEUMATIC SYSTEM

Screw compressor




1. When the rotor is unmesh at the intake end of the

cylinder, air is drawn into the cavity between the
main rotor blades and the secondary rotor grooves.









2. As the rotation continues, the tip of the rotor passes through

the edge of the air inlet, trapping air in the cell formed by the
rotor cavity and the cylinder wall.













3. As further rotation causes the main
rotor blades to roll into the secondary Click here to watch how a

rotor grooves, compression begins, screw compressor works
reducing the volume and increasing

the unit pressure.






CHAPTER 1 : INTRODUCTION TO PNEUMATIC SYSTEM

End of lesson 3

















Kindly answer the questions

given in the CIDOS













Thank You






Pneumatic & Hydraulics