US 12,228,034 B2
Additively manufactures multi-metallic adaptive or abradable rotor tip seals
Viktor Kilchyk, Lancaster, NY (US); and Brent J. Merritt, Southwick, MA (US)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Apr. 28, 2022, as Appl. No. 17/661,222.
Prior Publication US 2023/0349299 A1, Nov. 2, 2023
Int. Cl. F01D 11/18 (2006.01); F01D 5/14 (2006.01)
CPC F01D 11/18 (2013.01) [F01D 5/14 (2013.01); F05D 2230/30 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A rotor blade for a turbomachine comprising:
a base;
a tip opposite the base in a spanwise direction;
a leading edge;
a trailing edge opposite the leading edge in a chordwise direction;
a pressure surface extending from the leading edge to the trailing edge, and extending from the base to the tip; and
a suction surface extending from the leading edge to the trailing edge, and extending from the base to the tip, and
wherein the tip comprises:
a tip seal extending from the leading edge to the trailing edge of the rotor blade, the tip seal comprising:
a base end connecting the tip seal to the rotor blade;
a distal end opposite the base end;
a first side extending from the base end to the distal end, and extending from the leading edge to the trailing edge; and
a second side opposite the first side and extending from the base end to the distal end, and extending from the leading edge to the trailing edge;
a first portion with a first composition, wherein the first portion extends from the leading edge to the trailing edge and from the base end to the distal end; and
a second portion with a second composition different from the first composition, wherein the second portion is joined directly to the first portion and extends from the leading edge to the trailing edge and from the base end to the distal end;
wherein the first composition is metallic and comprises a first coefficient of thermal expansion and the second composition is metallic and comprises a second coefficient of thermal expansion, and wherein the second coefficient of thermal expansion is greater than the first coefficient of thermal expansion;
wherein the first side of the tip seal is formed by the first portion and is convex, and the second side is concave and formed by the second portion.