Screw compressor is a volume compressor. In other words, air compression occurs due to a decrease in the volume of the working cavity.
Atmospheric air passes through an air filter, where there is a rough cleaning of dust and dirt. The operation of a screw compressor without the use of an air filter is strictly prohibited, since solid particles contained in the air can disable a screw unit.
After the air filter, the air passes through the inlet valve, which is designed to adjust the compressor performance. Further, the air enters the screw unit consisting of a case and a screw pair, or a compression head, as it is often called. This is one of the most vulnerable elements in the compressor, since the gaps between the rotors are less than a millimeter and the hit of extraneous particles can lead to jamming of the screw pair.
In the screw block, the air is compressed by reducing cells of cells, while the heat is released, which must be removed. To this end, the coolant is injected into the compression cavity (oil is usually used in screw compressors, less often water). In addition to cooling, the oil lubricates the rubbing parts and seals the gaps in the screw block, which reduces the leaks and foxes of compressed air from the side of the high pressure to the side of the low.
After a screw block, compressed air enters the oil -sparing container (oil separator), where a partial separation from oil and moisture occurs. Further, the air passes through the cyclone separator, where more than 90% of the oil is separated. The separation occurs due to the emerging centrifugal forces, thanks to which the oil particles settled on the walls of the separator and due to coarse certification flow into the oil filter and is again injected into the screw unit.
After the separator, compressed air enters the end cooler, in which cooling occurs due to cold atmospheric air, as a result of which condensate falls from compressed air, which further flows into a specially device, where water and oil separation for further disposal occurs for further disposal.
Cooled and partially drained air obtained at the output of a screw compressor can be supplied to most consumers without additional air preparation equipment.
Bezudzdov Alexey
