US 12,168,936 B2
Method and system for de-priming an aircraft engine component containing a flammable fluid for fire safety
Kashif Mohammed, Brossard (CA); and John Sgouromitis, Dorval (CA)
Assigned to PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed by PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed on Mar. 20, 2023, as Appl. No. 18/186,347.
Prior Publication US 2024/0318575 A1, Sep. 26, 2024
Int. Cl. F01D 21/14 (2006.01); F01D 19/00 (2006.01); F01D 19/02 (2006.01); F01D 21/12 (2006.01); F01D 25/12 (2006.01); F01D 25/18 (2006.01); F01D 25/20 (2006.01); F01D 25/22 (2006.01); F01M 1/18 (2006.01); F01M 11/04 (2006.01); F01M 11/10 (2006.01)
CPC F01D 21/14 (2013.01) [F01D 19/00 (2013.01); F01D 19/02 (2013.01); F01D 21/12 (2013.01); F01D 25/12 (2013.01); F01D 25/125 (2013.01); F01D 25/18 (2013.01); F01D 25/20 (2013.01); F01D 25/22 (2013.01); F01M 1/18 (2013.01); F01M 11/0458 (2013.01); F01M 11/10 (2013.01); F01M 2011/0466 (2013.01); F05D 2260/98 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An aircraft engine, comprising:
an oil system of the aircraft engine for distributing oil to a plurality of components, a component of the plurality of components containing a baseline volume of oil during normal operation, the baseline volume of the oil being greater than a maximum volume of the oil for compliance with fire resistance requirements, the oil system having:
an oil circuit hydraulically connecting the plurality of components to an oil source,
a de-priming port in the oil circuit, the de-priming port fluidly connected to a fluid source, the fluid source being at a pressure sufficient to overcome a pressure drop through the component to drain the component to a volume of oil less than the maximum volume of the oil to provide fire resistance when being subjected to a fire event, and
a valve hydraulically connected to the oil circuit at the de-priming port, the valve having a closed configuration preventing a fluid of the fluid source from entering the oil circuit and an open configuration permitting the fluid to enter the oil circuit via the de-priming port and through the valve, the valve movable from the closed configuration to the open configuration in response to the component being subjected to the fire event.