METHOD OF CONNECTING IMPELLER TO SHAFT, CONNECTION ARRANGEMENT AND ROTARY MACHINE

摘要

FIELD: machine building.;SUBSTANCE: connection arrangement comprises shaft (3) having axial through hole (12), tie rod (4) located inside axial through hole (12), impeller (2) comprising a solid hub, blades, and an integral stub protruding axially from the solid hub. At an end of tie rod (4) there is integral member (11) having a shape radially protruding from tie rod (4). Stub has cavity (10) for receiving said member (11) and an axial hole for inserting said member (11) into cavity (10). Stub axial hole has a shape corresponding to the shape of member (11). Cavity (10) is so sized and shaped as to allow rotation of said member (11) inside cavity (10) and trapping (8) of said member (11) in cavity (10) once rotated. Shaft (3) and impeller (2) are coupled together by coupling (6). Said trapping (8) allows transmission of axial load between tie rod (4) and impeller (2).;EFFECT: said coupling (6) allows transmission of torque between shaft (3) and impeller (2).;17 cl, 9 dwg