Patent ID: 6439851
Filing Date: 2002-08-27
Classification: F01D,Y02T

Abstract:
A rotor assembly comprising:a disk having a rotational axis, opposing front and rear surfaces, a rim, and a plurality of circumferentially spaced apart blade retaining slots extending through said rim from said front disk surface through said rear disk surface in a direction D which forms an angle &thgr; of at least 10Â° with said disk axis, each pair of adjacent slots defining a disk lug therebetween, each of said slots having a first radially inwardly facing slot load reaction surface of length M extending from said front disk surface in said direction D on a first of said lugs, and a second radially inwardly facing slot load reaction surface of length N extending from said rear disk surface in said direction D on a second of said lugs adjacent said first lug, each of said slots having a length L from said disk front surface to said disk rear surface in said direction D; and a plurality of blades, each having an airfoil and a root integral with said airfoil, said root disposed within a respective one of said slots, said root having a radially outwardly facing first root load reaction surface of length M extending in said direction D forming a load transfer interface of length M with said first slot load reaction surface and a radially outwardly facing second root load reaction surface of length N extending in said direction D forming a load transfer interface of length N with said second slot load reaction surface, wherein said slot length L is greater than at least one of said lengths M and N.