Notes

OEM Dresser Rand Compressor
Different Types of Air Compressors
An air Compressor is doubtless certainly one of the main vitality consuming utilities in any industrial operation and are primarily categorized in two types. The classification is predicated on their building and operation features.


The two major classification of Air Compressor are:

01) Positive Displacement Type

02) Dynamic Type.

You will find details of each sort from below description.

01) Positive Displacement Type Air Compressor.

Positive displacement types compressor are these, who mechanically displace a set volume of air into a lowered volume. The fixed quantity can be delivered by compressor when operated at fastened pace. OEM dresser rand parts is decided by the system load situations. If the consumption of air is more, then discharge strain falls below the cut-off strain & compressor works on load condition.

This forms of Air Compressor additional categorized as

A) Reciprocating Air Compressor.

In this kind, compressed air is generated by to & fro motion of piston contained in the cylinder(compression chamber). Each motion compresses a fixed amount of free air at a specific strain. Single stage, double stage or a number of stage and single appearing or double performing is the additional classification of Reciprocating Air Compressor. A Vertical sort Air Compressor is use for the appliance of compressed air ranging in between 50 to 150 c. f. m and the Horizontal stability type is most suitable for software starting from 200 to 5000 c. f. m.

B) Rotary Air Compressor.

In this type, air is compressed by two rotating or inter meshing rotors. According to the sort of development Rotary Compressor can be further categorized as (a) Rotary Screw Compressor (b) Rotary Vane compressor.

(a) Rotary Screw Compressor.

Air is compressed between two rotating screw (male & female screw) and casing. The compression happened in progressively reducing area between these two parts.

(b) Rotary Vane compressor.

Air is compressed between casing & rotating rotor by the help of movable rotor blade. This type of Air Compressor could be additional classified as Single Stage or Double Stage Rotary Air Compressor.

02) Dynamic Type Air Compressor.

The Dynamic Type Air Compressors mechanically impart velocity to the air. This action is produced by the Impellers rotating at a excessive speed, in enclosed casing. The air is forced into a progressively lowered volume. The volumetric circulate will vary inversely with the differential strain across the compressor.

This type of compressor is further categorized as (a) Centrifugal Air Compressor (b) Axial Flow Air Compressor (c) Roots Blower Compressor.

(a) Centrifugal Air Compressor.

In a Centrifugal Air Compressor, an Impeller is mounted on a shaft and positioned within housing, consisting of an inlet duct, a volute and a Diffuser. The velocity to the air can be impart by the excessive velocity rotation of Impeller. The Diffuser surrounds the Impeller and act to convert the Kinetic vitality of air into potential vitality at a better stress level.

(b) Axial Flow Air Compressor.

The Axial Flow Type Air Compressor is essentially a large capacity, excessive pace machine with characteristics quite totally different from the centrifugal air compressor. Each stage consist of two row of blades, one row rotating & the subsequent row of blade is stationery. The rotor blades impart velocity and pressure to the air because the motor turns, the velocity being converted to strain in stationery blades.

(c) Roots Blower Compressor.

This sort is usually known as as blower. The discharge air pressure obtained from this kind of machine may be very low. The Discharge Pressure of 1 bar can be obtained in Single Stage and pressure of 2. 2 bar is obtained from Double Stage. The discharge pressure achieved by two rotors which have separate parallel axis and rotate in opposite directions. This is the example of Positive Displacement Compressor in Rotary Type Air Compressor.



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