The rotating screw belongs to the positive volume compressor family. Positive volume pumps create flow using an enlarged cavity on the suction side and a reduced cavity on the pressure side.
The two most commonly used compressors today are the rotary vane and the reciprocating piston. You can also browse https:/compressedair.net.au/air-compressors/ to buy the best air compressors.
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Compared to the two, the rotating screw uses no valves, is lighter than reciprocating pistons, has no pulsation, which makes the basic requirements less extreme, and maintains its design efficiency during operation, as the rotor never comes into contact with other people.
The screw compressor was originally developed in the mid-1950s and was eventually developed to work between reciprocating piston capabilities and centrifugal engines for commercial, industrial, and gas applications.
The screw compressor consists of two interlocking spiral rotors contained in a housing. The clearance between the rotor and between the housing and the rotor is typically 0.003" to 0.005".
The plug-in or drive rotor is connected to an electric motor or motor by an extension shaft. In oil-injected engines, the female rotor is driven by the male rotor through a thin layer of oil. Dry screw compressors use a set of gears to achieve proper rotation.
The compression holes are placed and cut to achieve the application pressure ratio. To achieve maximum efficiency, the focus is on suitable geometries that meet the application's molding requirements.
Some screw compressor designs use a variable relief valve that continuously strives for maximum efficiency by opening and closing depending on pressure conditions in the system.