Component with internal damping
AssigneeROLLS-ROYCE plc
InventorChristopher A. Powell
Life of this patent
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Abstract
A component such as a blade for use in a gas turbine engine comprises a body 2 formed from outer panels 8, 10 defining an internal cavity 12. A damping element 14 is provided in the cavity 12 and is secured at one end between the panels 8, 10 at one end of the body 2, for example adjacent the root of the blade. Damping material fills the cavity 12 and so extends between the damping element 14 and the panels 8, 10. Vibration induced in the blade causes relative movement between the body 2 of the blade and the damping element 14, causing energy loss in the damping material which damps the vibration. The components 8, 10, 14 may be secured by a diffusion bonding process.
Claims22
A component comprising a body having an internal cavity defined by an internal surface of the body, a damping element being secured to the body and cantilevered therefrom into the internal cavity, damping material being disposed within the cavity between the damping element and the internal surface.
A method of manufacturing a component, in which method:
- a plurality of panels are joined together in a diffusion bonding process to form a body of the component, a damping element being disposed between the panels during the diffusion bonding process whereby a diffusion bond is formed at an attachment region of the damping element between the damping element and at least one of the panels;
- the panels are deformed by applying internal pressure between the panels, thereby to create an internal cavity in which the damping element extends;
- and
- a damping material is introduced into the cavity to extend between the damping element and at least one of the panels.
Dependencies are inferred from the claim text.