US 12,331,667 B2
Flow draining enhancement system for engine sump cavities
Jacob Harral, Indianapolis, IN (US); Michael Kabbes, Indianapolis, IN (US); and Michael Dornfeld, Indianapolis, IN (US)
Assigned to Rolls-Royce North American Technologies Inc., Indianapolis, IN (US)
Filed by Rolls-Royce North American Technologies Inc., Indianapolis, IN (US)
Filed on May 10, 2023, as Appl. No. 18/314,900.
Prior Publication US 2024/0376836 A1, Nov. 14, 2024
Int. Cl. F01M 11/04 (2006.01); F01M 11/00 (2006.01); F01M 11/06 (2006.01); F01M 11/12 (2006.01)
CPC F01M 11/0408 (2013.01) [F01M 11/0004 (2013.01); F01M 11/062 (2013.01); F01M 11/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An oil sump system for a gas turbine engine, the oil sump system comprising:
a first oil drainage outlet in a surface of an enclosure of the oil sump system;
a second oil drainage outlet in the surface, the second oil drainage outlet in liquid communication with the first oil drainage outlet, wherein the surface is substantially unobstructed between at least the first oil drainage outlet and the second oil drainage outlet such that liquid is free to flow between the first oil drainage outlet and the second oil drainage outlet along the surface due to, at least in part, an orientation of the gas turbine engine; wherein an entry of the first oil drainage outlet, an entry of the second oil drainage outlet, and the surface extending therebetween are substantially coplanar;
a suction pump in liquid communication with the first oil drainage outlet and the second oil drainage outlet; and
a valve positioned at the first oil drainage outlet to selectively open and evacuate the liquid from the enclosure of the oil sump system through the first oil drainage outlet in response to the valve being submerged in the liquid, the liquid accumulating on the surface when the gas turbine engine is at level flight.