Abstract: A seal assembly for use in a gas turbine engine includes a first component, a second component, and a sealing unit. The first component is spaced apart from the second component to form a gap therebetween. The sealing unit is positioned in the gap between the first and second components to block liquids and/or gasses from traveling through the gap.

Abstract: A seal assembly for use in a gas turbine engine includes a first component, a second component, and a sealing unit. The first component is spaced apart from the second component to form a gap therebetween. The sealing unit is positioned in the gap between the first and second components to block liquids and/or gasses from traveling through the gap.

Abstract: A lubrication scavenge system is disclosed herein. The lubrication scavenge system includes a structure disposed for high-speed rotation about an axis. The lubrication scavenge system also includes a sump housing with an inwardly-facing surface substantially encircling the structure for receiving and directing lubricant expelled from the structure. A volume is defined between the structure and the inwardly-facing surface. The lubrication scavenge system also includes an open cell metal foam body disposed in the volume and tightly encircling the structure to substantially reduce windage.

Abstract: A lubrication scavenge system. The lubrication scavenge system includes a structure disposed for high-speed rotation about an axis. The lubrication scavenge system also includes a sump housing with an inwardly-facing surface substantially encircling the structure for receiving and directing lubricant expelled from the structure. A volume is defined between the structure and the inwardly-facing surface. The lubrication scavenge system also includes an open cell metal foam body disposed in the volume and tightly encircling the structure to substantially reduce windage.

Abstract: A foil thrust bearing forms the primary rotating interface for a film riding face seal. This face seal includes a spring system that will allow the entire assembly to translate axially relative to a static attachment. The complete assembly will form a hybrid foil/film riding face seal that shows much promise at being sufficiently flexible to enable operation in a gas turbine engine. The seal includes a flexible top plate having a non-flat surface under its working conditions, and a spring support system to allow the top plate to accommodate axial excursions and out-of-flat distortions.

Abstract: A foil thrust bearing forms the primary rotating interface for a film riding face seal. This face seal includes a spring system that will allow the entire assembly to translate axially relative to a static attachment. The complete assembly will form a hybrid foil/film riding face seal that shows much promise at being sufficiently flexible to enable operation in a gas turbine engine. The seal includes a flexible top plate having a non-flat surface under its working conditions, and a spring support system to allow the top plate to accommodate axial excursions and out-of-flat distortions.

Abstract: A seal between a gas turbine engine casing and a high speed shaft on the casing includes a stationary seal ring bearing on an outside cylindrical wall of an annular flange of a seal runner rotatable with the shaft. The annular flange has an inside cylindrical wall bathed in oil for conducting away heat generated at the sliding interface between the seal ring and the annular flange. Heat transfer to the oil is improved by coating the inside cylindrical wall of the annular flange with a thin layer of a metal of higher coefficient of thermal conductivity than the seal runner. The coating is preferably an electro-chemical deposit of silver.

Abstract: A bearing assembly for use with a spindle and featuring a rotatable preload actuator having differential thread portions in mesh with threaded sections of a selected race adjustment member to selectively vary the loading of the bearing. Drive means is provided for rotating the preload actuator to control actual bearing load.