Patent ID: 9194254
Filing Date: 2015-11-24
Classification: F01D,F01M,F16N

Abstract:
1. A lube system, comprising: an air-oil tank including a deaerator configured to remove a first quantity of oil from a first air-oil supply to generate a second air-oil supply having a second quantity of oil, which is smaller than the first quantity of oil, the air oil tank being configured to output the second air-oil supply to an air vent line; a de-oiler disposed along the air vent line and configured to remove from the second air-oil supply oil mist including oil droplets of a minimum size; and a pressure regulating valve (PRV) disposed along the air vent line between the air-oil tank and the de-oiler to regulate fluid pressures within the air-oil tank, the PRV being configured to encourage formation of the oil droplets of at least the minimum size by flowing the second air-oil supply through a valve seat area defined by a movable poppet and a valve seat, the valve seat defining serially discrete, axially arranged recesses all of which have randomly variable cross-sectional shapes and randomly variable sizes and each recess having radial surfaces and an axial surface extending between angular corners respectively formed by the axial surface with the radial surfaces.