Aluminum Fan Blades with Root Wear Mitigation

摘要

A fan blade assembly with wear mitigation characteristics is disclosed. In a titanium hub, dovetail shaped slots are used for accommodating dovetail shaped roots of fan blades. At least the inwardly facing walls of the dovetail shaped slots are coated with a dry film lubricant. The inwardly directed pressure faces of the dovetail shaped root of the fan blades are covered with polymeric wear mitigation pads. The combination of wear mitigation pads on the pressure faces of the root of the fan blade in combination with a dry film lubricant coating on the inwardly directed walls of the dovetail shaped slots in the hub provide excellent wear mitigation characteristics and prolong the life of the fan blades.

主权项

1. A fan blade assembly comprising:
a disk shaped hub including an outer periphery including a plurality of circumferentially spaced dovetail shaped slots extending radially inwardly through the outer periphery of the hub; each slot including an inner surface disposed between and connected to a pair of slanted walls that extend towards each other as they extend radially outwardly from the inner surface of the slot towards the outer periphery of the hub, the slanted walls being coated with a lubricant; a plurality of fan blades, each fan blade including a dovetail shaped root received within one of the slots of the hub, each dovetail shaped root including an inner face disposed between and connected to a pair of slanted pressure faces that extend towards each other as they extend radially outwardly from the inner face, the inwardly slanted pressure faces being at least partially covered with at least one wear mitigation pad.