After the driver is started, the triangle belt drives the crankshaft of the compressor to rotate, which is converted into a 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 suction valve; after reaching the bottom dead center, the piston moves from the shaft side to the cover side , the suction valve closes, the cylinder volume gradually becomes smaller, the air in the cylinder is compressed, and the pressure rises. When the pressure reaches a certain value, the exhaust valve is opened, and the compressed air enters the gas storage tank through the pipeline, and the compressor repeats itself. It works independently and continuously delivers compressed air into the gas storage tank, so that the pressure inside the tank gradually increases, thereby obtaining the required compressed air.
Inhalation process:
The air suction port on the screw air inlet side must be designed so that the compression chamber can fully absorb air. However, the screw compressor does not have an air inlet and exhaust valve group. The air inlet is only regulated by the opening and closing of a regulating valve. When When the rotor rotates, the tooth groove space of the main and auxiliary rotors is the largest when it turns to the opening of the air inlet end wall. At this time, the tooth groove space of the rotor is connected with the free air in the air inlet, because the air in the tooth groove is in exhaust during exhaust. 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 axially into the tooth groove of the main and auxiliary rotors. When the air fills the entire tooth groove, the air intake side end face of the rotor turns away from the air inlet of the casing, and the air between the tooth grooves is sealed. The above is, [air intake process]. 4.2 Closing and conveying process: When the main and auxiliary rotors finish inhaling, 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, which is the [closing process]. As the two rotors continue to rotate, their tooth peaks and tooth grooves match at the suction end, and the matching surface gradually moves toward the exhaust end. This is the [conveying process].4.3 Compression and injection process: During the transportation 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]. During compression, lubricating oil is also sprayed into the compression chamber to mix with air due to the pressure difference.
Exhaust process:
When the meshing end face of the rotor is turned to communicate with the exhaust of the casing, (at this time the compressed gas pressure is the highest) 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 which time the two rotors are meshed The tooth groove space between the surface and the exhaust port of the casing 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 again. In progress.