ROTARY SCREW AIR COMPRESSORS

WHAT IS A ROTARY SCREW COMPRESSOR AND ITS BENEFITS?

The rotary screw compressors are rotary positive displacement machines capable of high-speed operation over a wide range of operating pressures and flow rates at high efficiencies. The absence of valves and other mechanical forces enable screw air compressors to operate at high speeds while combining a large flow rate with a small exterior dimension. The major advantage of a rotary screw air compressor is energy efficiency. This becomes possible due to their ability to continuously supply compressed air with minimum fluctuation in delivery pressure and generate less heat than typical air compressors. Other advantages of rotary screw air compressors include:

Rotary screw air compressors are convenient and safe as they deliver air continuously for the required purposes leaving the chances of any accident to a minimum.
Rotary screw compressors can function in extreme weather conditions ranging from high to low temperatures.
Rotary screw compressors result in lower maintenance costs and have low noise levels.
Rotary screw compressors are long-lasting as they have little or no capacity reduction.
Rotary screw compressors are designed to run tools that generate more power than typical equipment.
Rotary screw compressors ensure minimum oil-carryovers of as low as three ppm in the oil-lubricated machine.

ELGI’S ROTARY SCREW AIR COMPRESSOR PROFILE

The ELGi rotary screw air compressor profile consists of several segments where each has a different shape.
It consists of large positive displacement, which increases the air pressure by reducing its volume.
The presence of a strong female rotor helps in tapping more air and reduction of space continuously.
A short sealing line maintains a seal over the entire contact length, eliminating a sealing strip.
Better clearance distribution.

WHAT IS THE WORKING PRINCIPLE OF ROTARY SCREW AIR COMPRESSOR?

The Screw air compressor uses a rotary-type positive-displacement mechanism. The screw element consists of two rotors that are similar to a helix, each with a different shape and number of grooves/ teeth. Atmospheric air is sucked into this screw element, and as the air progresses along with the rotors, it gets compressed. The main characteristic of the screw compressor is the male and a female rotor element, which trap the air and release as required.

In an oil-lubricated rotary screw air compressor, the male rotor is driven by the motor or engine, whereas the female rotor is driven by the male rotor or the thin film of oil between them. However, in an oil-free rotary screw air compressor, there is no oil to seal the chamber. Instead, the timing between the male and female rotors is controlled by a set of gears.

The rotary screw air compressors run on the principle of male and female rotors running in the opposite direction where the prime mover turns the rotor of the air end. This action creates a vacuum resulting in surrounding air being driven into the air ends through the air filter. As the rotors turn progressively, the air gets trapped in the spaces between the two screws (rotors).

The air is taken from the atmosphere into the rotary screw compressor through the air intake system. It then passes through a filter that helps in removing suspended particles from it. The filtered air then goes into the airend, which is the heart of the rotary screw compressor. The air trapped within the spaces between the two rotors with lobes mesh with each other at this point. As the rotors turn, they progressively compress the trapped pockets of the air, and the compressed air is discharged at the outlet of the airend.

ELGi’s EN and EG series are best-in-class rotary screw electric air compressors ideal for various industrial applications. Find your perfect match with an ELGi rotary screw air compressor for sale today.

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