Composite blade
AssigneeROLLS-ROYCE plc
InventorAlison McMillan
Life of this patent
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Abstract
A composite blade (28) comprises a root portion (38) and an aerofoil portion (40). The aerofoil portion (40) has a tip (50) remote from the root portion (38). The aerofoil portion (40) has a leading edge (42), a trailing edge (44), a suction surface (46) extending from the leading edge (42) to the trailing edge (44) and a pressure surface (48) extending from the leading edge (42) to the trailing edge (44). The composite blade (28) comprises reinforcing fibres (62) arranged in a matrix material (63). The tip (50) of the aerofoil portion (40) is arranged to define a recess (66), an insert (68) is arranged in the recess (66) and the insert (68) comprises an abradable material.
Claims19
A composite blade comprising a root portion and an aerofoil portion, the aerofoil portion having a tip remote from the root portion, the aerofoil portion having a leading edge, a trailing edge, a suction surface extending from the leading edge to the trailing edge and a pressure surface extending from the leading edge to the trailing edge, the composite blade comprising reinforcing fibres arranged in a matrix material, the tip of the aerofoil portion being arranged to be abradable.
A gas turbine engine as claimed in claim 21 wherein a casing surrounds the composite blades, an inner surface of the casing having an abrasive material.
Dependencies are inferred from the claim text.