US 11,834,991 B2
Lubrication system for turbine engine electric machine
Marc J. Muldoon, Marlborough, CT (US); and Russell B. Witlicki, Wethersfield, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by Raytheon Technologies Corporation, Farmington, CT (US)
Filed on Oct. 17, 2022, as Appl. No. 17/967,335.
Claims priority of provisional application 63/256,331, filed on Oct. 15, 2021.
Prior Publication US 2023/0120797 A1, Apr. 20, 2023
Int. Cl. F01D 25/18 (2006.01); F02C 7/06 (2006.01); F02C 7/32 (2006.01)
CPC F02C 7/06 (2013.01) [F01D 25/18 (2013.01); F02C 7/32 (2013.01); F05D 2220/76 (2013.01); F05D 2260/98 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An assembly for a turbine engine, comprising:
an electric machine including a rotor and a stator;
a turbine engine component discrete from the electric machine; and
a lubrication system including a first lubricant circuit, a second lubricant circuit and a lubricant source fluidly coupled in parallel with the first lubricant circuit and the second lubricant circuit, the first lubricant circuit comprising a machine volume for the electric machine, and the second lubricant circuit comprising a component volume for the turbine engine component;
the first lubricant circuit configured to deliver lubricant to the machine volume at a first temperature; and
the second lubricant circuit configured to deliver the lubricant to the component volume at a second temperature that is greater than the first temperature.