Aerofoil blade damper
AssigneeROLLS-ROYCE plc
InventorKevin Chin
Life of this patent
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Abstract
A damping member (27) for positioning between the undersides of the platforms of adjacent turbine blades (20) and the peripheral surface of a disc (19) upon which the turbine blades (20) are mounted. The damping member (27) comprises first, second and third portions (28,31 and 32). The first portion (28) simultaneously engages the adjacent blade platforms (24) whereas the second and third portions (31,32) converge to engage each other at the disc (19) peripheral surface from a spaced apart relationship with each other at their attachment to the first portion (28). Frictional interaction between the second and third portions (31,32) and the disc (19) peripheral surface provides damping of turbine blade (20) vibration.
Claims9
A damping member for damping vibration of aerofoil blades mounted on a rotary disc, which aerofoil blades are provided with platforms in radially spaced apart relationship with said disc, comprising a first portion for operationally and simultaneously engaging the platforms of a pair of circumferentially adjacent aerofoil blades, and second and third portions extending from said first portion for operationally engaging a peripheral surface on said disc, said second and third portions converging from a spaced apart relationship with each other at said first portion into operational engagement with each other adjacent said disc peripheral surface.
Dependencies are inferred from the claim text.