A rotary screw air compressor compresses air using two interlocking rotors inside a housing. Understanding the basic process helps with maintenance and troubleshooting.
The Compression Cycle
Air enters through the inlet valve and fills the space between the rotors. As the rotors turn, the space becomes smaller and the air pressure rises.
Oil Injection and Cooling
In oil-injected models, oil seals, cools and lubricates the rotors. The mixture is then separated so clean compressed air leaves the machine.
Air End and Drive
The airend is the core compression component. It is driven by an electric motor directly or through belts, and controlled by an electronic or PLC controller.
Regular inspection of filters, oil and the airend keeps the compressor efficient over its service life.