Bladed rotor with a tiered blade to hub interface
AssigneeUnited Technologies Corporation
InventorsAmanda E. Barnette, David Rootes
Life of this patent
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Abstract
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 radially inboard of the blade attachment 44. The spacer ensures a tight fit to resist windmilling induced wear. The tiered character of the spacer reduces the risk of damage during blade installation and removal. The spacer also helps to transmit axial loads to a snap ring, which is one component of a blade axial retention system, during a blade separation event.
Claims13
A bladed rotor, comprising:
- a rotor hub having peripheral slots, each slot having a floor;
- a plurality of blades, each blade having an attachment occupying one of the slots, each attachment having a base surface;
- and
- a tiered interface between each blade and its respective slot.
A spacer for occupying a space between a blade attachment and a disk slot floor in an assembled bladed rotor, the spacer having an outer contact surface intended to contact the attachment and an inner contact surface intended to contact the slot floor, at least one of the contact surfaces being tiered.
A blade for a bladed rotor, the blade having an airfoil and a root, the root including an attachment, the attachment having a stepped base surface.
Dependencies are inferred from the claim text.