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US 2015/0308287 A1Published application
Recessable damper for turbine
AssigneeRolls-Royce North American Technologies Inc.
InventorMark O'Leary
Life of this patent
Estimating the term…
Abstract
A turbine blade damping system for a turbine includes a turbine blade platform and a damper recessable within a pocket defined by the platform. An underside of the platform defines a beveled surface. An outer side of the damper defines a complementary beveled surface. When the turbine spools up, centrifugal force acting on the damper forces it in an outward direction from the pocket toward a mating surface of an adjacent turbine blade platform.
Claims20
A turbine blade damper system comprising
- a platform having a leading end, a trailing end, a first circumferential side, a second circumferential side, a radially-outward side, and a radially-inward side, the radially-inward side defining a pocket extending circumferentially inwardly from the first circumferential side, the pocket having a ceiling portion, a first wall portion extending radially inward from the ceiling portion proximate the leading end, a second wall portion extending radially inward from the ceiling portion proximate the trailing end, a first floor portion extending from the first wall portion toward the second wall portion, and a second floor portion extending from the second wall portion toward the first wall portion, the ceiling portion defining a pocket beveled surface extending circumferentially inwardly from the first circumferential side, and the second circumferential side defining a platform sealing surface;
- and
- a damper having a leading end, a trailing end, a first circumferential side, a second circumferential side, a body portion, a radially-outward side, a first leg portion extending radially inwardly from the leading end of the body portion, a second leg portion extending radially inwardly from the trailing end of the body portion, the first circumferential side defining a damper sealing surface, the radially-outward side defining a damper beveled surface;
- the damper beveled surface slidingly engaged with the pocket beveled surface, and the damper movable with respect to the platform between a first position wherein at least a portion of the damper is recessed within the pocket and a second position wherein a lesser portion of the damper is recessed with the pocket and the damper sealing surface is engaged with a platform sealing surface of an adjacent platform.
1 more element
A turbine blade damper system comprising
- a plurality of platforms, each platform having a leading end, a trailing end, a first circumferential side, a second circumferential side, a radially-outward side, and a radially-inward side, the radially-inward side defining a pocket extending circumferentially inwardly from the first circumferential side, the pocket having a ceiling portion, a first wall portion extending radially inward from the ceiling portion proximate the leading end, a second wall portion extending radially inward from the ceiling portion proximate the trailing end, a first floor portion extending from the first wall portion toward the second wall portion, and a second floor portion extending from the second wall portion toward the first wall portion, the ceiling portion defining a pocket beveled surface extending circumferentially inwardly from the first circumferential side, and the second circumferential side defining a platform sealing surface;
- and
- a damper having a leading end, a trailing end, a first circumferential side, a second circumferential side, a body portion, a radially-outward side, a first leg portion extending radially inwardly from the leading end of the body portion, a second leg portion extending radially inwardly from the trailing end of the body portion, the first circumferential side defining a damper sealing surface, the radially-outward side defining a damper beveled surface;
- the damper beveled surface slidingly engaged with the pocket beveled surface of a first of the plurality of platforms, and the damper movable with respect to the first of the plurality of platforms between a first position wherein at least a portion of the damper is recessed within the pocket of the first of the plurality of platforms and a second position wherein a lesser portion of the damper is recessed with the pocket of the first of the plurality of platforms and the damper sealing surface is engaged with a platform sealing surface of a second of the plurality of platforms adjacent the first of the plurality of platforms.
1 more element
Dependencies are inferred from the claim text.