US 12,276,202 B2
Oil tank for aircraft engine
Sebastien Bergeron, St-Bruno-de-Montarville (CA); and Marion Daniel, Verdun (CA)
Assigned to PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed by PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed on Mar. 31, 2021, as Appl. No. 17/219,171.
Prior Publication US 2022/0316361 A1, Oct. 6, 2022
Int. Cl. F01D 25/20 (2006.01); F01M 11/00 (2006.01); F01M 11/06 (2006.01); F16N 19/00 (2006.01)
CPC F01D 25/20 (2013.01) [F01M 11/0004 (2013.01); F01M 11/064 (2013.01); F01M 11/065 (2013.01); F16N 19/00 (2013.01); F01M 2011/0041 (2013.01); F05D 2220/323 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An aircraft engine comprising:
an aircraft engine oil tank including:
a first tank portion defining a first volume for holding oil, the first tank portion including an oil outlet for delivering oil to a lubrication load, the first volume being in fluid communication with a vent opening for venting the aircraft engine oil tank, the oil outlet being disposed lower than the vent opening relative to an upright orientation of the aircraft engine oil tank; and
a second tank portion defining a second volume in fluid communication with the first volume, at least part of the second volume being disposed higher than the vent opening relative to the upright orientation of the aircraft engine oil tank, the second tank portion being laterally separated from the vent opening relative to the upright orientation of the aircraft engine oil tank, an oil-holding capacity of the second volume being equal to or greater than a minimum quantity of oil required in the first volume for the oil outlet to be submerged in the oil in the upright orientation of the aircraft engine oil tank, the second tank portion holding oil in the second volume and preventing the oil in the second volume from flowing to the vent opening when an upward force acting on the oil in the second volume is greater than a downward force acting on the oil in the second volume relative to the upright orientation of the aircraft engine oil tank, the second tank portion being configured to prevent the oil in the second volume from draining from the aircraft engine oil tank when the upward force is greater than the downward force;
a lubrication load;
an oil pump in fluid communication with the oil tank and with the lubrication load, the oil pump driving oil from the oil tank toward the lubrication load; and
a scavenge pump in fluid communication with the oil tank and with the lubrication load, the scavenge pump driving oil from the lubrication load toward the oil tank for recirculation.