US 12,253,001 B2
Static de-aerator and lubricant system
Joanna Radon, Rakszawa (PL); and Ho-Wing Edmund Leung, Chambly (CA)
Assigned to PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed by Pratt & Whitney Canada Corp., Longueuil (CA)
Filed on Nov. 28, 2022, as Appl. No. 18/070,107.
Prior Publication US 2024/0175376 A1, May 30, 2024
Int. Cl. F01D 25/20 (2006.01); F16N 39/00 (2006.01)
CPC F01D 25/20 (2013.01) [F16N 39/002 (2013.01); F05D 2230/30 (2013.01); F05D 2260/98 (2013.01); F16N 2210/02 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A de-aerator for an oil system of a gas turbine engine, comprising:
a body extending between a first axial end and a second axial end opposite the first axial end, the body having at least one sidewall that extends between the first axial end and the second axial end, and a base panel connected to the at least one sidewall at the second axial end, wherein the base panel and the at least one sidewall define an internal cavity of the body;
a cover panel connected to the body at the first axial end;
a fluid inlet in communication with the body at the first axial end, the fluid inlet having an internal flow passage configured to direct fluid tangentially into the internal cavity;
a helical fluid passage disposed within the internal cavity having an entry end and an exit end, the entry end disposed to receive fluid from the fluid inlet, the helical fluid passage having a plurality of circumferential turns that collectively axially descend toward the second axial end of the body, wherein the circumferential turns each include one or more air passages disposed radially inward providing a gas path to a central region disposed radially inside of the helical fluid passage;
at least one partition disposed within the internal cavity at or below the exit end of the helical fluid passage and spaced above the base panel of the de-aerator;
a centrally located vent tube extending parallel to a central axis of the de-aerator between the first axial end and the at least one partition;
at least one fluid outlet disposed adjacent the base panel, the at least one fluid outlet including a plurality of fluid outlets disposed in the at least one sidewall, and the at least one fluid outlet configured to permit liquid passage from the internal cavity of the body to outside the body; and
a fluid collection body disposed radially outside of the at least one sidewall, wherein the fluid collection body is concentric with and radially spaced apart from, an exterior surface of the at least one sidewall to form an annular cavity there between;
wherein the helical fluid passage includes a helically extending panel that extends between an interior surface of the at least one sidewall and an exterior surface of the vent tube.