公开(公告)号：US11105205B2

公开(公告)日：2021-08-31

申请号：US14341189

申请日：2014-07-25

申请人： ALSTOM Technology Ltd

发明人： Steffen Holzhaeuser ,  Daniel Eckhardt ,  Sergei Riazantsev ,  Torsten Winge

IPC分类号： F01D5/08 ,  F01D5/06

摘要： A rotor shaft adapted to rotate about a rotor axis thereof. The rotor shaft includes a rotor cavity configured concentrically to the rotor axis inside the rotor shaft. The rotor shaft further includes a plurality of cooling bores extending radially outward from the rotor cavity to feed cooling air into an internal cooling system in a blade. Each cooling bore includes a bore inlet portion and a distal bore outlet portion. The respective bore inlet portion ends in a plateau, projecting above the outer circumference contour of the rotor cavity. Thus, cooling bore inlets are shifted to a low stress area and the lifetime of the rotor is improved.