What is a rotary screw air compressor?

A rotary screw air compressor is one of the two types of positive displacement gas compressors. It uses two rotors to create the pressure needed for air compression. They are one of the easiest types of air compressors to use and maintain. The other type of positive displacement compressor is the reciprocating or piston compressor.

What is a screw compressor?

A screw compressor is a type of rotary compressor which compresses air due to screw action. The main advantage of using this compressor is that it can supply compresses air continuously with minimum fluctuation in delivery pressure. It is usually applied for low-pressure applications up to 8 bars.

What is the role of oil in a screw compressor?

In a screw compressor, the oil acts as a hydraulic seal for the air end and transfers the mechanical energy required to rotate the screws. It also functions as the coolant for the compressed air when high temperatures occur. In an oil-free screw compressor, there is no seal present between the male and female screws.

How does an air compressor work?

An air compressor works by trapping ambient air between two helical rotors in the compressor. As the screws turn, the air's volume is reduced, increasing the pressure. In many cases, air compressors utilize the full power of two screws for large-scale productions.

Are some rotary screw air compressors oil-free?

A rotary screw air compressor has two main types: oil-free or oil-flooded. Some rotary screw air compressors are oil-free. The main difference between these is the presence of oil in the air end. Animation of lysholm screw found inside a rotary screw air compressor.

How many types of rotary screw air compressors are there?

There are two types of rotary screw air compressors: In oil-lubricated screw compressor technology, the male rotor drives the female rotor In oil-free compressor technology, a timing gear drives both rotors for harmonic running, with minimum calculated clearance between both elements.