US 12,253,008 B1
Integrated two-stage impeller
Alden Lee Winn, Glastonbury, CT (US); and Andrew W. Solomon, Windsor, CT (US)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Apr. 26, 2024, as Appl. No. 18/647,636.
Int. Cl. F01D 9/04 (2006.01); F01D 5/22 (2006.01); F01D 5/28 (2006.01)
CPC F01D 9/04 (2013.01) [F01D 5/225 (2013.01); F01D 5/28 (2013.01); F05D 2240/12 (2013.01); F05D 2240/30 (2013.01); F05D 2300/17 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An impeller comprising:
a cylindrical portion defining a fluid inlet, the cylindrical portion coaxial with a rotational axis of the impeller;
a hub;
a shroud extending downward and radially away from the cylindrical portion and covering the hub;
a first plurality of vanes extending between the shroud and the hub; and
an extension portion disposed between the shroud and the hub and downstream of the first plurality of vanes, the extension portion comprising:
an outer ring;
an inner ring; and
a second plurality of vanes extending between the outer ring and the inner ring.
 
12. A method of fabricating an impeller, the method comprising:
additively manufacturing, from a metallic material, a hub, a shroud, and a first plurality of vanes extending between the hub and the shroud; and
additively manufacturing, from the metallic material, an extension portion between the hub and the shroud, the extension portion comprising:
an outer ring;
an inner ring; and
a second plurality of vanes extending between the outer ring and the inner ring.