How does an air compressor work?

1. Inhalation process:

The air inlet on the intake side of the screw type must be designed so that the compression chamber can fully inhale, while the screw compressor does not have an intake and exhaust valve group, and the intake air is only regulated by the opening and closing of a regulating valve. When the rotor rotates, the cogging space of the main and auxiliary rotors is the largest when it turns to the opening of the inlet end wall. At this time, the cogging space of the rotor is communicated with the free air of the air inlet. When the exhaust is completed, the tooth groove is in a vacuum state. When it is turned to the air inlet, the outside air is sucked in and flows into the tooth groove of the main and auxiliary rotors in the axial direction. When the air fills the entire tooth groove, the end face of the intake side of the rotor turns away from the air inlet of the casing, and the air between the tooth grooves is closed. The above is, [air intake process].

2. Sealing and conveying process:

At the end of the suction of the main and auxiliary rotors, the tooth peaks of the main and auxiliary rotors are closed with the casing. At this time, the air is closed in the tooth groove and no longer flows out, that is, [closed process]. The two rotors continue to rotate, their tooth peaks and tooth grooves match at the suction end, and the matching surface gradually moves to the discharge end, which is the [transport process].

3. Compression and fuel injection process:

During the conveying process, the meshing surface gradually moves to the exhaust end, that is, the gap between the meshing surface and the exhaust port gradually decreases, the gas in the tooth groove is gradually compressed, and the pressure increases, which is the [compression process]. At the same time of compression, the lubricating oil is also injected into the compression chamber and mixed with the chamber air due to the action of the pressure difference.

4. Exhaust process:

When the meshing end face of the rotor turns to communicate with the exhaust of the casing, (at this time the pressure of the compressed gas is the highest) the compressed gas starts to be discharged, until the meshing face of the tooth crest and the tooth groove moves to the exhaust end face, at this time the two rotors The tooth groove space between the meshing surface and the casing exhaust port is zero, that is, the exhaust process is completed. At the same time, the length of the tooth groove between the rotor meshing surface and the air inlet of the casing reaches the longest, and the suction process is completed. in progress again.

Oil free rotary screw air compressor