Turbine blade damper arrangement
AssigneeROLLS-ROYCE plc
InventorsRoderick M. Townes, Caner H. Helvaci, Adrian J. Webster
Life of this patent
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Abstract
A turbine blade damper arrangement in which a damper is positioned against the undersides of the platforms of adjacent turbine blades. In operation, the damper is centrifugally urged into engagement with the blade platforms to provide damping of relative movement between the blades. The damper and platform surfaces that it engages are of part-cylindrical configuration in order to minimise gas leakage paths between the damper and blade platforms.
Claims7
A turbine blade damper arrangement, the arrangement including on each turbine blade on a first circumferential side a first part cylindrical contact surface on the inner side of the turbine platform, and on the opposite circumferential side a second flat inclined contact surface on the circumferential side of the turbine platform, the first contact surface being spaced from the second contact surface on an adjacent turbine blade, with the cylindrical axis of the first contact surface substantially perpendicular to the said second contact surface, and with the second contact surface inclined away from the turbine radial direction;
- an elongate damper being located between each adjacent pair of turbine blade platforms, the damper including a first part cylindrical engagement face engageable with the first contact surface, and a second flat engagement face substantially perpendicular to the axis of the first engagement face, which second engagement face is engageable with the second contact surface on an adjacent turbine blade.
Dependencies are inferred from the claim text.