Vibration dampers for turbine blades
AssigneeUnited Technologies Corporation
InventorsRobert Knowlton, Max Asterlin, Brandon M. Rapp, Parth Jariwala
Life of this patent
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Abstract
A turbine blade vibration damper is described. The damper has an axially-extending main body defining an inner surface and opposed damping surface. The main body also has an edge spanning from the inner surface to the damping surface and slotted apertures extending through the main body. The slotted apertures extend between the inner surface and damping surface. Adjacent pairs of slotted apertures have elongated shapes defining longitudinal axes that intersect at a point off the surface of the damper.
Claims16
A turbine blade vibration damper, comprising:
- an axially-extending main body defining an inner surface and opposed damping surface, the main body having a plurality of slotted apertures extending therethrough;
- an edge spanning from the inner surface to the damping surface;
- and
- wherein an adjacent pair of the slotted apertures each have an elongated shape defining a longitudinal axis, wherein the longitudinal axes intersect at a point off the surface of the damper.
A turbine blade vibration damper, comprising:
- an axially-extending main body defining an inner surface and opposed damping surface with a plurality of slotted apertures extending therethrough;
- and
- a contoured edge spanning from the inner surface to the damping surface, the contoured edge being configured and arranged for mechanical contact with a root of an adjacent turbine blade,
- wherein at least a pair of the adjacent slotted apertures each has an elongated shape defining respective longitudinal axes, wherein the longitudinal axes are skew lines.
A turbine disk, comprising:
- a blade disk with a periphery, first and second adjacent disk slots, and a coolant channel extending to the disk periphery;
- a first blade with a blade platform and blade root disposed within the first disk slot, the blade platform having an inner surface and mateface;
- a second blade with a blade platform and blade root disposed within the second disk slot, the blade platform having an inner surface and a mateface opposing the first blade mateface;
- a vibration damper having a plurality of slotted apertures extending through the damper, the damper being movably captured within a cavity defined by blade roots, disk periphery, and respective portions of the platform inner surfaces,
- wherein the coolant channel is fluidly communicative with the opposing matefaces through the damper slotted apertures, and
- wherein the damper slotted apertures are configured and arranged to supply a consistent coolant flow to the opposing matefaces as the damper moves within the cavity.
Dependencies are inferred from the claim text.