ROTOR OF SCREW COMPRESSOR, AND ITS MANUFACTURING METHOD Russian patent published in 2013 - IPC F04C18/16 F04C29/00 F04C29/04 

FIELD: machine building.

SUBSTANCE: rotor 1 of screw compressor includes working part 2 and shaft 6. At least some part of shaft 6 is located in central or almost central longitudinal hole or channel 5 of working part 2 of rotor. Shaft 6 includes extending element 7. Working part 2 of rotor or at least some part thereof is retained on shaft 6 by means of straining elements 11 and 12, which are fixed along longitudinal axis of the shaft and connected to each other through the above extending element 7 that during installation of working part 2 of rotor on shaft 6 is pre-extended. After fixation of straining elements 11 and 12 and relief of tension load element 7 is retained in the state of preliminary longitudinal tension. Preliminary strain is performed by means of straining elements 11 and 12, which are separated from each other with working part 2 of rotor or with some part thereof.

EFFECT: reduction of material consumption and providing rotor cooling.

32 cl, 11 dwg