公开(公告)号：US20200224542A1

公开(公告)日：2020-07-16

申请号：US16719336

申请日：2019-12-18

Applicant: ROLLS-ROYCE plc

Inventor： Jack R. TILLEY ,  Farida IBRAHIM.A ,  Theodoros PANAGIOTIDIS ,  Johannes-Paulus OLUFEAGBA

IPC: F01D5/30 ,  F01D5/02

Abstract: A bladed disc for a turbine engine has disc and blade portions. The disc portion extends in a radial direction from the turbine engine central axis and has slots around its circumference with an inverse fir tree profile. The blade portion has aerofoil and root sections. The root section is configured to have a fir tree profile. The blade portion engages with a slot on the disc portion circumference with the fir tree profile of the root section of the blade portion engaging with the inverse fir tree profile of the slot within the disc portion. The fir tree profile of the root section of the blade portion and the inverse fir tree profile of the slot of the disc portion are curved. The bladed disc has a clearance plate mounted on at least one of the blades, the clearance plate extending across the slot on the disc portion.