Patent ID: 8167091
Filing Date: 2012-05-01
Classification: F01D,F01M,F16H

Abstract:
1. An oil scavenge system of a gas turbine engine comprising: a housing defined about the axis of rotation of a rotating element, the housing confining an air/oil mixture in motion within the housing and defining an oil scavenge area below the axis of rotation, the housing including an outlet at a low location of the housing; and a churning damper supported within the housing and located in the oil scavenge area, the churning damper including at least one plate having a plurality of holes extending through the plate and distributed unevenly over the plate to define a central blank region free from holes extending through the plate in contrast to and surrounded by a peripheral area having said holes with spacing between adjacent rows of the holes smaller than the central blank region for allowing the air/oil mixture in motion to pass through the plate in the peripheral area of the at least one plate to cause flow energy dissipation.