How air compressors work and how they work

What is the working principle of an air compressor? How does an air compressor work?

Working principle of air compressor: After the driver is started, the compressor crankshaft rotates through the triangle tape, and is converted into reciprocating motion of the piston in the cylinder through the crank rod mechanism. When the piston moves from the cover side to the shaft, the cylinder volume increases, the pressure in the cylinder is lower than the atmospheric pressure, and the outside air enters the cylinder through the filter and the intake valve; after reaching the bottom dead point, the piston moves from the shaft side to the cover side, the intake valve closes, the cylinder volume gradually decreases, the air in the cylinder is compressed, and the pressure increases. When the pressure reaches a certain value, the exhaust valve is pushed open, and the compressed air enters the air storage tank through the pipeline. In this way, the compressor works repeatedly.

Continuously deliver compressed air to the gas tank, so that the pressure in the tank gradually increases, thereby obtaining the required compressed air.

1. Inhalation process:

The air intake port on the intake side of the screw compressor must be designed so that the compression chamber can fully inhale air. However, the screw compressor does not have an intake and exhaust valve group. The intake is only regulated by the opening and closing of a regulating valve. When the rotor rotates, the tooth groove space of the main and auxiliary rotors is very large when it turns to the intake end wall opening. At this time, the tooth groove space of the rotor is connected to the free air of the intake port. Because the air in the tooth groove is completely discharged during exhaust, the tooth groove is in a vacuum state when the exhaust is completed. When it turns to the intake port, the outside air is sucked in and flows into the tooth grooves of the main and auxiliary rotors along the axial direction. When the air fills the entire tooth groove, the intake side end face of the rotor turns away from the intake port of the casing, and the air between the tooth grooves That is, it is closed. The above is the intake process. 4.2 Closing and conveying process: When the main and auxiliary rotors are finished inhaling, the main and auxiliary rotors will seal with the casing. At this time, the air is closed in the tooth groove and no longer flows out, which is the closing process. The 2 rotors continue to rotate, and their tooth peaks and tooth grooves match at the intake end, and the matching surface gradually moves toward the exhaust end, which is the conveying process. 4.3 Compression and oil injection process: During the conveying process, the meshing surface gradually moves toward the exhaust end, that is, the tooth groove between the meshing surface and the exhaust port gradually decreases, and the gas in the tooth groove is gradually compressed, and the pressure increases, which is the compression process. While compressing, the lubricating oil is also sprayed into the compression chamber due to the pressure difference and mixed with the air.

2. Exhaust process:

When the meshing end face of the rotor turns to communicate with the exhaust of the casing, the compressed gas begins to be discharged until the meshing surface of the tooth peak and the tooth groove moves to the exhaust end face. At this time, the tooth groove space between the meshing surface of the two rotors and the exhaust port of the casing is zero, that is, the exhaust process is completed. At the same time, the tooth groove length between the meshing surface of the rotor and the air inlet of the casing reaches a very long length, and the air intake process is in progress again.

3. Compression and injection process:

During the conveying process, the meshing surface gradually moves toward the exhaust end, that is, the tooth groove between the meshing surface and the exhaust port gradually decreases, the gas in the tooth groove is gradually compressed, and the pressure increases. This is the compression process. While compressing, the lubricating oil is also sprayed into the compression chamber due to the pressure difference and mixed with the chamber gas.