公开(公告)号：US10221691B2

公开(公告)日：2019-03-05

申请号：US14896465

申请日：2014-06-05

申请人： Nuovo Pignone Srl

发明人： Gabriele Mariotti ,  Enrica Caterina Benedetto ,  Alberto Scotti Del Greco ,  Marco Mencagli

IPC分类号： F01D5/02 ,  F04D29/26 ,  F01D25/16

摘要： A connection arrangement comprising a shaft having an axial through hole, a tie rod located inside the axial through hole, an impeller comprising a solid hub, a plurality of blades, and an integral stub protruding axially from the solid hub; at an end of the tie rod there is an integral body having a shape radially protruding from the tie rod; the stub has a cavity for receiving the body and an axial hole for inserting the body into the cavity; the stub axial hole has a shape corresponding to the shape of the body; the cavity is so sized and shaped as to allow rotation of the body inside the cavity and trapping of the body in the cavity once rotated; the shaft and the impeller are coupled together by a coupling.