US 11,781,436 B2
Hybridized airfoil for a gas turbine engine
Daniel A. Bales, Avon, CT (US); Dmitri Novikov, Avon, CT (US); Robert C. Dolan, Coventry, CT (US); Eric W. Malmborg, Amston, CT (US); and Steven T. Gordon, Glastonbury, CT (US)
Assigned to RTX Corporation, Farmington, CT (US)
Filed by Raytheon Technologies Corporation, Farmington, CT (US)
Filed on Jan. 7, 2022, as Appl. No. 17/571,202.
Application 17/571,202 is a continuation of application No. 16/530,917, filed on Aug. 2, 2019, granted, now 11,248,477.
Prior Publication US 2022/0127966 A1, Apr. 28, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. F01D 5/30 (2006.01); B23K 1/00 (2006.01); F01D 5/14 (2006.01); F04D 29/38 (2006.01); B23K 101/00 (2006.01)
CPC F01D 5/3061 (2013.01) [B23K 1/0018 (2013.01); F01D 5/147 (2013.01); F04D 29/388 (2013.01); B23K 2101/001 (2018.08); F05D 2230/232 (2013.01); F05D 2240/301 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An airfoil for a gas turbine engine comprising:
a first portion welded to a second portion along an interface such that at least the first portion establishes an airfoil section and the second portion establishes a root section mountable to a rotatable hub, the first and second portions being separate and distinct components prior to being welded, and wherein:
the airfoil section includes an airfoil body extending between leading and trailing edges in a chordwise direction, extending between pressure and suction sides separated in a thickness direction, and extending from the root section in a spanwise direction to a tip portion;
a recessed region extends inwardly from at least one of the pressure and suction sides;
the airfoil body includes a plurality of ribs bounding respective pockets within a perimeter of the recessed region, wherein the plurality of ribs are spaced apart from each other and the perimeter of the recessed region, and the recessed region and at least one of the plurality of ribs are dimensioned to extend across the interface; and
a cover skin coupled to the airfoil body along the plurality of ribs to enclose the recessed region.