Screw rotor and screw fluid machine main body

摘要

Performance improvement of hollow screw rotor for heat, pressure and rust.A screw rotor having a screw portion having a spiral groove extending in the axial direction and extending in the axial direction;At least a portion of the screw portion has a radial cross-sectionThe outer surface of the tooth grooveAxis centerA support portion for connecting the axial side of the outer surface and the outer diameter side of the shaft portion andEach of the support portions adjacent to each other in the rotational direction and the hollow portion formed by the axial inner surface of the bottom of the tooth or tooth tip are composed of respective sections.At least in the radial cross-section of the screw portionAt least one of the shaft portion and the support portionThe outer surface isIt consists of a cross section continuously connected as an integral structure by different members.