Glass viscous damper
AssigneeGeneral Electric Company
InventorsSiddaraja Mallikarjuna Devangada, John M. Delvaux, Robert Frank Hoskin
Life of this patent
Estimating the term…
Abstract
Rotor blades, vibrational dampening elements, and methods are provided. A rotor blade includes a platform, a shank extending radially inward from the platform, and an airfoil extending radially outward from the platform. One or more fluid chambers are defined within the rotor blade. Glass is disposed within each fluid chamber of the one or more fluid chambers. A mass is disposed within each fluid chamber of the one or more fluid chambers. The mass is movable within the glass relative to the airfoil.
Claims18
A rotor blade for a turbomachine, the rotor blade comprising:
- a platform;
- a shank extending radially inward from the platform;
- and
- an airfoil extending radially outward from the platform, wherein one or more fluid chambers are defined within the rotor blade;
- glass disposed within each fluid chamber of the one or more fluid chambers;
- and
- a mass disposed within each fluid chamber of the one or more fluid chambers, the mass movable within the glass relative to the airfoil, wherein the glass includes a viscosity of between 10−4 pascal seconds (Pa-s) and 10−2 Pa-s at a temperature of between 600° C. and 900° C.
A vibrational dampening element attached to a turbine component and configured to adjust an amplitude of oscillations of the turbine component, the vibrational dampening element comprising:
- a mass;
- a casing encapsulating the mass;
- and
- a fluidic chamber defined between the mass and the casing and filled with glass, wherein the glass includes a viscosity of between 10−4 pascal seconds (Pa-s) and 10−2 Pa-s at a temperature of between 600° C. and 900° C.
A method of adjusting an amplitude of oscillations of a turbine component disposed in a turbine section of a turbomachine, the method comprising:
- providing the turbine component having a fluid chamber and a mass disposed within the fluid chamber;
- and
- disposing glass within the fluid chamber;
- wherein operation of the turbine results in a decrease of a viscosity of the glass to produce a molten-state glass, the mass being translated through the molten-state glass to adjust the amplitude of oscillations of the turbomachine component.
Dependencies are inferred from the claim text.