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US 8,814,498 B2Granted
Self-actuating bleed valve for a gas turbine engine
AssigneeHamilton Sundstrand Corporation
InventorsRobert Goodman, Michael M. Kuhns, James S. Elder
Life of this patent
Estimating the term…
Abstract
A bleed valve for an air plenum includes a valve body which defines a valve seat. A poppet is movable relative to the valve seat between an open position and a closed position. A spring biases the poppet to the open position and toward the air plenum.
Claims16
A bleed valve for an air plenum comprising:
- a valve body which defines a valve seat, wherein said valve body defines a guide through which a poppet shaft which extends from a poppet is movable;
- a poppet movable relative to said valve seat between an open position and a closed position;
- a spring operable to bias said poppet to said open position and toward the air plenum;
- a spring operable to bias said poppet o said open position and toward the air plenum:
- a piston mounted to said poppet shaft, said piston supports a piston ring, wherein said piston ring interfaces with a cover;
- and
- an external pressure source in cozy communication with said cover to selectively change a pressure within said cover.
4 more elements
A gas turbine engine comprising:
- a compressor section;
- an air plenum in communication with said compressor section;
- and
- a bleed valve in communication with said air plenum, said bleed valve movable between an open position and a closed position dependent on a pressure within the compressor section, said bleed valve comprising:
- a valve body which defines a valve seat;
- a poppet movable relative to said valve seat;
- a spring operable to bias said poppet away from said valve seat and toward said air plenum when said bleed valve is in said open position:
- and
- a piston mounted to said poppet shaft, said piston interfaces with a cover to define a pressure chamber;
- and
- an external pressure source in communication with said cover to selectively reduce a pressure within said cover to overcome said spring and move said poppet to said closed position.
8 more elements
A method of installing a bleed valve on a gas turbine engine comprising:
- locating a bleed valve in communication with an air plenum in communication with a compressor section, wherein the bleed valve includes:
- a valve body which defines a valve seat, wherein said valve body defines a guide through which a poppet shaft which extends from a poppet is moveble;
- a poppet movable relative to said valve seat between an open position and a closed position;
- a spring operable to bias said poppet o said open position and toward the air plenum;
- a spring operable to bias said poppet to said open position and toward the air plenum:
- a piston mounted to said poppet shaft, said piston supports a piston ring, wherein said piston ring interfaces with a cover;
- and
- an external pressure source in communication with said cover to selectively change a pressure within said cover;
- moving a poppet within a bleed valve between an open position and a closed
- biasing the poppet away from a valve seat and toward the air plenum when the position dependent on a pressure within the compressor section;
- and bleed valve is in the open position.
8 more elements
Dependencies are inferred from the claim text.