Gas turbine engine rotor arrangement
AssigneeROLLS-ROYCE plc
InventorsColin Young, Guy D Snowsill
Life of this patent
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Abstract
A gas turbine engine rotor arrangement comprising at least one blade and a disc is disclosed. The blade extends radially outwards from the disc and is secured thereto by cooperating shank of the blade and recess of the disc. The shank comprises a bottom surface facing a base surface of the recess, the bottom surface having axially extending peripheral edges. The bottom surface is shaped so that when the engine rotor arrangement is in use, liquid in a cavity between the bottom surface and base surface, acted upon by an unbalanced force in the radially outward direction, is guided by the bottom surface to flow between and away from the axial edges.
Claims10
A gas turbine engine rotor arrangement comprising:
- a disc including a recess having a base surface;
- and
- a blade having a shank securing the blade to the disc, the blade extending radially outwards from the disc, the shank of the blade being disposed in the recess of the disc, the shank including:
- a bottom surface facing the base surface of the recess, the bottom surface having peripheral edges extending in an axial direction of the gas turbine rotor arrangement, the entire bottom surface having a concave shape extending in a circumferential direction and the axial direction, and facing the base surface, a cross-sectional shape of the bottom surface continuously changing from a front end to a rear end of the shank along the axial direction of the bottom surface, the bottom surface being declined in the axial direction towards a rear of the disc such that, when the engine rotor arrangement is in use, liquid located in a cavity formed by a gap between the bottom surface and the base surface, which is acted upon by an unbalanced force in a radially outward direction, is guided by the concave shape of the bottom surface to flow between the peripheral edges extending in the axial direction and away from the peripheral edges extending in the axial direction.
Dependencies are inferred from the claim text.