Abstract: A bearing assembly comprises ring assemblies cooperating to form a roller volume. A single circumferential slot is in an inner circumferential surface of the inner ring assembly and in fluid communication with the roller volume through central passages in the inner ring assembly. The proximal inner ring includes proximal axial slots extending axially along a proximal portion of the inner circumferential surface, a first plurality of the proximal axial slots being in fluid communication with the roller volume, a second plurality of the proximal axial slots not in fluid communication with the roller volume. The distal inner ring includes distal axial slots extending axially along a distal portion of the inner circumferential surface from the circumferential slot to respective distal passages in fluid communication with the roller volume, wherein a circumferential spacing between adjacent proximal axial slots is equivalent to a circumferential spacing between adjacent distal axial slots.

Abstract: A bearing assembly comprises an outer ring and an inner ring radially inward of the outer ring and cooperating therewith to form a roller volume. The inner ring has opposed faces including slots extending axially and circumferentially spaced. The slots extend axially to openings into the opposed axial faces and communicate with partial circumferential slots in the inner circumferential surface and in fluid communication with the roller volume through passages in the inner ring. A first plurality of the axial slots has a radial depth increasing from a first of the axial faces to the respective partial circumferential slot. A second plurality of the axial slots has a radial depth increasing from the second of the axial faces to the respective partial circumferential slot. Bearing elements are in the roller volume rollingly disposed against the outer ring and the inner ring.

Abstract: A bearing assembly comprises an outer ring and an inner ring radially inward of the outer ring and cooperating therewith to form a roller volume. The inner ring has opposed faces including slots extending axially and circumferentially spaced. The slots extends axially to openings into the opposed axial faces and communicate with partial circumferential slots in the inner circumferential surface and in fluid communication with the roller volume through passages in the inner ring. A first plurality of the axial slots has a radial depth increasing from a first of the axial faces to the respective partial circumferential slot. A second plurality of the axial slots has a radial depth increasing from the second of the axial faces to the respective partial circumferential slot. Bearing elements are in the roller volume rollingly disposed against the outer ring and the inner ring.

Abstract: A bearing assembly comprises ring assemblies cooperating to form a roller volume. A single circumferential slot is in an inner circumferential surface of the inner ring assembly and in fluid communication with the roller volume through central passages in the inner ring assembly. The proximal inner ring includes proximal axial slots extending axially along a proximal portion of the inner circumferential surface, a first plurality of the proximal axial slots being in fluid communication with the roller volume, a second plurality of the proximal axial slots not in fluid communication with the roller volume. The distal inner ring includes distal axial slots extending axially along a distal portion of the inner circumferential surface from the circumferential slot to respective distal passages in fluid communication with the roller volume, wherein a circumferential spacing between adjacent proximal axial slots is equivalent to a circumferential spacing between adjacent distal axial slots.

Abstract: An assembly for preventing damage to bearings of a gas turbine engine during transportation is provided. The assembly comprises a turbofan gas turbine engine having an engine casing and at least one turbine shaft supported by a plurality of bearings, and, a brace secured relative to the engine casing and biasing the shaft along an axial direction of the shaft.

Abstract: An assembly for preventing damage to bearings of a gas turbine engine during transportation is provided. The assembly comprises a turbofan gas turbine engine having an engine casing and at least one turbine shaft supported by a plurality of bearings, and, a brace secured relative to the engine casing and biasing the shaft along an axial direction of the shaft.

Abstract: A compliant support for an axial thrust air bearing between a shaft and a housing with an annular thrust runner extending radially from the shaft having a runner bearing surface. The housing has a housing bearing surface and an air inlet in communication with a source of pressurized air. An annular foil support sleeve is disposed on the housing bearing surface, having an air foil surface with an array of foils. The foils serve to conduct air from the air inlet forming a pressurized air curtain between the runner bearing surface and foils on the the sleeve and is then disposed of through an air outlet. The sleeve has a compliant surface with at least one compliant annular ring. The compliant surface includes at least one compliant annular ring such as a fluorocarbon O-ring for low temperature service under 300° F.; a fluorosilicon O-ring for mid-range temperature service 300-600° F.; or a metallic mesh ring for high temperature service over 600° F.

Abstract: An integrated roller bearing and fluid transfer sleeve adapted for supporting and transferring fluid to a rotating shaft in a gas turbine engine reduction gearbox. The integrated roller bearing and fluid transfer sleeve comprises a fluid transfer sleeve having a sleeve casing defining therein an annular fluid plenum open radially outwardly, and at least two spaced apart roller bearing assemblies each comprising an annular outer race integral with the sleeve casing and each assembly comprising a plurality of roller elements supported by the outer race. Each roller bearing assembly is disposed within the sleeve casing, one at each opposing end thereof, and the plurality of roller elements in each assembly define a first inner diameter substantially equal to an outer diameter of the rotating shaft adapted to be supported by the roller elements.

Abstract: A compliant support for an axial thrust air bearing between a shaft and a housing with an annular thrust runner extending radially from the shaft having a runner bearing surface. The housing has a housing bearing surface and an air inlet in communication with a source of pressurized air. An annular foil support sleeve is disposed on the housing bearing surface, having an air foil surface with an array of foils. The foils serve to conduct air from the air inlet forming a pressurized air curtain between the runner bearing surface and foils on the the sleeve and is then disposed of through an air outlet. The sleeve has a compliant surface with at least one compliant annular ring. The compliant surface includes at least one compliant annular ring such as a fluorocarbon O-ring for low temperature service under 300° F.; a fluorosilicon O-ring for mid-range temperature service 300-600° F.; or a metallic mesh ring for high temperature service over 600° F.

Abstract: An integrated roller bearing and fluid transfer sleeve adapted for supporting and transferring fluid to a rotating shaft in a gas turbine engine reduction gearbox. The integrated roller bearing and fluid transfer sleeve comprises a fluid transfer sleeve having a sleeve casing defining therein an annular fluid plenum open radially outwardly, and at least two spaced apart roller bearing assemblies each comprising an annular outer race integral with the sleeve casing and each assembly comprising a plurality of roller elements supported by the outer race. Each roller bearing assembly is disposed within the sleeve casing, one at each opposing end thereof, and the plurality of roller elements in each assembly define a first inner diameter substantially equal to an outer diameter of the rotating shaft adapted to be supported by the roller elements.