US 11,814,976 B2
Geared gas turbine engine with oil deaerator and air removal
William G. Sheridan, Southington, CT (US)
Assigned to Raytheon Technologies Corporation, Farmington, CT (US)
Filed by Raytheon Technologies Corporation, Farmington, CT (US)
Filed on Jan. 28, 2022, as Appl. No. 17/586,875.
Application 17/586,875 is a continuation of application No. 17/016,935, filed on Sep. 10, 2020, granted, now 11,248,494.
Application 17/016,935 is a continuation of application No. 16/684,926, filed on Nov. 15, 2019, granted, now 11,066,954, issued on Jul. 20, 2021.
Application 16/684,926 is a continuation of application No. 16/108,540, filed on Aug. 22, 2018, granted, now 10,480,350, issued on Nov. 19, 2019.
Application 16/108,540 is a continuation of application No. 14/794,866, filed on Jul. 9, 2015, granted, now 10,060,289, issued on Aug. 28, 2018.
Claims priority of provisional application 62/030,105, filed on Jul. 29, 2014.
Prior Publication US 2022/0307387 A1, Sep. 29, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. F01D 25/18 (2006.01); F01D 25/20 (2006.01); F02C 7/06 (2006.01); B01D 19/00 (2006.01)
CPC F01D 25/18 (2013.01) [B01D 19/0068 (2013.01); B01D 19/0073 (2013.01); F01D 25/20 (2013.01); F02C 7/06 (2013.01); F05D 2260/609 (2013.01); Y02T 50/60 (2013.01)] 29 Claims
OG exemplary drawing
 
11. A method of operating a gas turbine engine comprising:
a propulsor drive turbine driving a gear reduction, said gear reduction driving a propulsor rotor; and
a lubrication system supplying oil to said gear reduction, with an oil tank, the lubrication system including a lubricant pump; and
supplying an air/oil mixture to an inlet of a deaerator, said deaerator separating oil and air, delivering separated air to an air outlet, and delivering separated oil back into the oil tank,
air within the oil tank moving outwardly through an air exit to the deaerator, and
an inlet velocity of the air/oil mixture to the deaerator is less than or equal to 14 feet/second and an exit velocity from the deaerator of the separated air is less than or equal to 14 feet/second; and
a gear ratio defined by said gear reduction being greater than 2.3.