SCREW COMPRESSOR (VERSIONS) Russian patent published in 2020 - IPC F04C28/12 F04C18/16 

FIELD: machine building.

SUBSTANCE: group of inventions relates to a screw compressor. Compressor includes a housing with a chamber, two screw rotors located in the chamber, two casing arranged in the slide valves channel and installed one after the other in parallel to the rotor axes and adjoining the compression wall surfaces to both rotors of the distribution slide valves. In the connected position the slide valves are closed by end sides (86, 88) and are movable in the direction of movement, in the separated position they are positioned at a distance from each other so that an intermediate space is formed. Spools in at least one transient position form inlet chamber (198) into which the medium to be compressed flows from one of the compression chambers by protruding between facing sides (86, 88) and that one of the slide valves is provided with at least one discharge outlet (212) adjoining chamber (198), through which the medium from chamber (198) enters the discharge hole aligned in this transition position with outlet (212) in the slide valves channel.

EFFECT: group of inventions is aimed at providing the most reliable transition of distributing slide valves from the connected position into the divided one.

26 cl, 15 dwg