The primary working principle of a screw air compressor involves a pair of interlocking male and female rotors rotating at high speed within the compressor housing to intake, compress, and discharge air. As the motor drives the rotors, air enters the compression chamber through the intake port; with the rotors' continuous rotation, the volume of the air gradually decreases while its pressure steadily rises, ultimately resulting in a stable output of compressed air. During the intake phase, the spaces between the rotor lobes expand, drawing external air into the compressor housing. Upon entering the compression phase, the male and female rotors intermesh, trapping the air between the rotors and the casing, and compression is achieved as this enclosed space diminishes. Once the compressed air reaches the designated pressure, it is discharged through the outlet port into the air storage system, ready for use by connected equipment. This entire process operates continuously, enabling the screw air compressor to deliver a stable and uninterrupted supply of air.
To ensure the equipment operates smoothly, screw air compressors are typically equipped with lubrication, cooling, and separation systems. The lubricating oil serves multiple functions: it not only reduces friction between the rotors but also acts as a sealant and provides cooling. After the compressed oil-air mixture undergoes separation, the air is discharged for use, while the lubricating oil is recirculated back into the system to continue its function, thereby enhancing both the operational efficiency and the service life of the equipment.
