公开(公告)号：WO2020190280A1

公开(公告)日：2020-09-24

申请号：PCT/US2019/022901

申请日：2019-03-19

Applicant: DRESSER-RAND COMPANY

Inventor： ALIUDDIN, Atif Muhammad ,  VACHON, Nicholas ,  SHERLOCK, Graham D. ,  GRIFFIN, Timothy R.

IPC: F01D5/22 ,  F01D11/00 ,  F01D5/30

Abstract: A turbine (10) includes a disk (25) having a plurality of protrusions (120) arranged such that any two adjacent protrusions (120) define an axial entry fir tree space (125), each protrusion (120) defining an outermost lobe (165) having an outermost surface (150) and an axial length. A turbine blade (30) includes an airfoil (170), a platform (175), and a blade root (180) having a fir tree arranged to engage a leading protrusion (135) and a trailing protrusion (140). The blade root (180) and the leading protrusion (135) cooperate to define a leading gap (200), and the blade root (180) and the trailing protrusion (140) cooperate to define a trailing gap (215). A leading plug (220) is disposed in the leading gap (200) and a trailing plug (225) is disposed in the trailing gap (215). Each of the leading plug (220) and the trailing plug (225) have a plug (220) length that is at least as great as the axial length.