Rotary kinetic fluid motors or pumps – With lubricating – sealing – packing or bearing means having... – For shaft sealing – packing – lubricating or bearing means
Reexamination Certificate
2009-04-06
2011-11-29
Paumen, Gary F. (Department: 2833)
Rotary kinetic fluid motors or pumps
With lubricating, sealing, packing or bearing means having...
For shaft sealing, packing, lubricating or bearing means
Reexamination Certificate
active
08066473
ABSTRACT:
A gas turbine engine with a floating air seal to form a seal between a rotor disk and an adjacent stator vane segment shroud and allow for both axial and radial shifting of the rotor disk with respect to the stator while maintaining the sealing capability. The floating air seal includes an annular piston that slides within an annular groove formed within the stator in an axial direction. The annular piston includes an annular groove on the rotor disk side to form an air cushion against the rotor disk, a pressure buffer surface on the opposite end, and a central passage to supply the air cushion chamber with pressurized fluid from the buffer pressure chamber. A balancing force on the annular piston is formed between the air cushion formed and the pressure force acting to push the annular piston toward the rotor surface. The pressurized air used to form the floating air seal is also supplied to internal cooling air passages of the turbine blades through passages formed within the rotor disk or by a cover plate attached on the rotor disk side.
REFERENCES:
patent: 6318958 (2001-11-01), Giesler et al.
patent: 6330780 (2001-12-01), Shipway
patent: 6623238 (2003-09-01), Langston et al.
Florida Turbine Technologies, Inc.
Paumen Gary F.
Ryznic John
LandOfFree
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