Working principle of twin screw air compressor ：
Inspiratory phase
At the initial stage, the gas enters the tooth space of the positive and negative rotor respectively through the suction orifice. As the rotor rotates, the two tooth space volumes expand continuously. When the two volumes reach the maximum value, the tooth space is disconnected from the suction orifice and the inhalation process ends
2.The compression stage
The rotor continues to rotate and presents a V - shaped intertooth volume pair. As the teeth are squeezed into each other, the volume gradually decreases and the gas compression process is realized.At the same time, the oil is injected into the compression chamber and mixed with air.The process is continued until the intertooth volume pair is connected to the exhaust orifice
3.Exhaust process
When the sealing volume between the teeth is connected with the exhaust port of the housing, the compressed gas begins to be discharged along with the lubricating oil.As the volume between the teeth not only shrinks, the air with the exhaust pressure is gradually discharged through the exhaust orifice.This process continues until the profile at the end of the tooth fully meshes.At this point, the air in the inter-tooth volume is completely discharged through the exhaust orifice.The two ends of the positive and negative rotor are supported by high speed bearings respectively.
