Bladed rotor for a gas turbine engine with a tiered blade to hub interface

摘要

A bladed rotor features a tiered interface between each blade 40 and their respective slots 16 in a rotor hub 12. Ideally the interface is a tiered spacer 58 that occupies the hub slot 16 radially inboard of the blade attachment 44. The spacer 58 ensures a tight fit to resist windmilling induced wear. The tiered character of the spacer 58 reduces the risk of damage during blade installation and removal. The spacer 58 also helps to transmit axial loads to a snap ring 60, which is one component of a blade axial retention system, during a blade separation event. <IMAGE>