US 12,492,711 B1
Open rotor with fixed guide vane/stator
Jeffrey T. Morton, Manchester, CT (US); and Andrew J. Murphy, Old Saybrook, CT (US)
Assigned to RTX Corporation, Farmington, CT (US)
Filed by RTX Corporation, Farmington, CT (US)
Filed on Jun. 28, 2024, as Appl. No. 18/758,112.
Int. Cl. F04D 29/56 (2006.01); F01D 7/00 (2006.01); F04D 19/00 (2006.01); F04D 29/54 (2006.01); B64C 11/06 (2006.01); B64C 11/08 (2006.01); F01D 17/16 (2006.01); F02C 6/20 (2006.01); F02C 9/58 (2006.01); F04D 27/00 (2006.01)
CPC F04D 29/563 (2013.01) [F01D 7/00 (2013.01); F04D 19/002 (2013.01); F04D 29/542 (2013.01); B64C 11/065 (2013.01); B64C 11/08 (2013.01); F01D 17/16 (2013.01); F01D 17/162 (2013.01); F02C 6/206 (2013.01); F02C 9/58 (2013.01); F04D 27/002 (2013.01); F05D 2220/324 (2013.01); F05D 2220/325 (2013.01); F05D 2230/80 (2013.01); F05D 2260/961 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An assembly for an aircraft propulsion system, the assembly comprising:
a propulsor rotor configured to rotate about an axis;
a guide vane structure disposed axially next to and downstream of the propulsor rotor and comprising a plurality of guide vanes arranged circumferentially about the axis; and
a manually activated variable geometry adjustment structure coupled to the plurality of guide vanes and configured to vary each of the plurality of guide vanes between a first fixed geometry such that each of the plurality of guide vanes are immovable during a full duration of a first flight and a second fixed geometry such that each of the plurality of guide vanes are immovable during a full duration of a second flight,
wherein the manually activated variable geometry adjustment structure comprises:
at least one trunnion disposed at or connected to a support structure of a propulsion system housing or an engine housing of the aircraft propulsion system and coupled to a proximal end of each of the plurality of guide vanes; and
a gear assembly coupled to the trunnion, the gear assembly configured to engage with an actuation ring, wherein, as the actuation ring moves, the gear assembly rotates, which in turn causes the trunnion to rotate to vary at least one of the plurality of guide vanes between the first fixed geometry and the second fixed geometry.