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US 8,132,815 B1Granted
Card seal for a turbine
AssigneeFlorida Turbine Technologies, Inc.
InventorDaniel R Dillon
Life of this patent
Estimating the term…
Abstract
A card seal with an annular arrangement of cards that form the card seal, where the cards each form an L-shape cross section with a wide front face and a narrow side face, where the side face has a constant width from a top end to a location greater than a mid-point, and from this point decreases in width to zero width at the bottom end. The side faces form a blockage against leakage flowing between adjacent cards in a cards seal assembly.
Claims6
A card seal comprising:
- a card seal case secured to a stator;
- a plurality of cards stacked against each other to form an annular arrangement around a rotor shaft;
- each card having a L-shaped cross sectional shape when viewed along a longitudinal axis of the card;
- each card having a front face and a perpendicular side face;
- said side face having a top end that meets a top end of the front face and a bottom end that meets a bottom end of the front face;
- the side face having a narrow width with respect to the front face from a the top end of the side face to at least half the length of the side face with the remaining length of the side face tapering down to zero width at the bottom end of the side face.
3 more elements
A card seal for sealing between a stator and rotor shaft comprising:
- a plurality of cards stacked against each other to form an annular arrangement for surrounding said rotor shaft;
- each card having a L-shaped cross sectional shape when viewed along a longitudinal axis of the card;
- each card having a front face and a perpendicular side face;
- said side face having a top end that meets a top end of the front face and a bottom end that meets a bottom end of the front face;
- the side face having a narrow width with respect to the front face from a the top end of the side face to at least half the length of the side face with the remaining length of the side face tapering down to zero width at the bottom end of the side face.
2 more elements
Dependencies are inferred from the claim text.