US 11,927,108 B2
Integrated bladed rotor
Paul Stone, Guelph (CA); and Dikran Mangardich, Richmond Hill (CA)
Assigned to PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed by PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed on Aug. 7, 2021, as Appl. No. 17/396,670.
Prior Publication US 2023/0043965 A1, Feb. 9, 2023
Int. Cl. F01D 5/14 (2006.01)
CPC F01D 5/141 (2013.01) [F05D 2240/305 (2013.01); F05D 2240/306 (2013.01); F05D 2250/712 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An integrated bladed rotor of a gas turbine engine, the integrated bladed rotor comprising:
a hub having a rotation axis and a radially outer platform relative to the rotation axis; and
a plurality of blades extending radially outwardly from the platform of the hub, the blades being integrally formed with the hub to define a monolithic component with the hub, each blade including:
an airfoil including a groove formed in an outer surface of the airfoil; and
a root fillet providing a transition between the outer platform of the hub and the outer surface of the airfoil, the root fillet defining a concave surface extending from the outer platform of the hub to the outer surface of the airfoil,
wherein:
the groove is disposed radially outward of the root fillet;
the groove is radially spaced apart from a runout of the root fillet at an intersection of the root fillet with the airfoil;
the root fillet and the outer surface of the airfoil have a tangent surface continuity at the intersection of the root fillet with the outer surface of the airfoil; and
the outer surface of the airfoil is devoid of another groove disposed radially inwardly of the groove and another groove disposed radially outwardly of the groove.