US 11,788,616 B2
Journal bearing
Fiona Halliday, Derby (GB); and Mark Spruce, Derby (GB)
Assigned to Rolls-Royce PLC, London (GB)
Filed by ROLLS-ROYCE plc, London (GB)
Filed on Jul. 21, 2022, as Appl. No. 17/814,019.
Claims priority of application No. 2111348 (GB), filed on Aug. 6, 2021.
Prior Publication US 2023/0044167 A1, Feb. 9, 2023
Int. Cl. F16H 57/08 (2006.01); F16C 17/02 (2006.01)
CPC F16H 57/08 (2013.01) [F16C 17/02 (2013.01); F16C 2202/22 (2013.01); F16C 2360/23 (2013.01); F16C 2361/61 (2013.01); F16H 2057/085 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A journal bearing comprising a first component and a second component, the first component and the second component being arranged to rotate relative to one another in normal use, wherein the first component comprises:
a first body that has an axis defining an axial direction and a radial direction perpendicular to the axial direction;
a first layer forming a functional surface facing the second component; and
a first subsurface layer between the first body and the first layer;
wherein the first subsurface layer is formed of a material having a first coefficient of thermal expansion in the radial direction, and the first body is formed of a material having a second coefficient of thermal expansion in the radial direction;
wherein the first coefficient of thermal expansion is lower than the second coefficient of thermal expansion;
wherein the first subsurface layer comprises a fibre-reinforced plastic; and
wherein the fibres in the fibre-reinforced plastic are predominantly oriented in the radial and circumferential directions.