Seal for a joint or juncture – Seal between relatively movable parts – Close proximity seal
Patent
1997-10-27
1999-11-02
Reichard, Lynne
Seal for a joint or juncture
Seal between relatively movable parts
Close proximity seal
277412, F16J 1544
Patent
active
059755377
ABSTRACT:
A rotor and stator assembly having a rotor and a stator with opposing surfaces defining an air bearing and an air dam of an aspirating face seal. In a first embodiment, the air bearing and the air dam are axially offset. In a second embodiment, the rotor has an axially extending protuberance located radially between the air bearing and the air dam. The axial offset and the protuberance each act to divert the air flow (e.g., compressed gas or combustion gases in a gas turbine or steam in a steam turbine) in a direction transverse to the air flow direction through the air bearing and the air dam, thus isolating the air flows from the air bearing and the air dam which improves seal performance.
REFERENCES:
patent: 2598176 (1952-05-01), Johnstone
patent: 3273899 (1966-09-01), Warnery
patent: 3291447 (1966-12-01), Brandon
patent: 3516757 (1970-06-01), Baumann
patent: 5284347 (1994-02-01), Pope
H.F. Hwang et al., AIAA-95-2618, "Advanced Seals for Engine Secondary Flow Path," 31st AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, Jul. 10-12, 1995, San Diego, CA.
C.E. Wolfe et al., AIAA-96-2802, "Full Scale Testing and Analytical Validation of an Aspirating Face Seal," 32nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, Jul. 1-3, 1996, Lake Buena Vista, FL.
B.S. Bagepalli et al., AIAA-96-2803, "Dynamic Analysis of an Aspirating Face Seal for Aircraft-Engine Application," 32nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, Jul. 1-3, 1996, Lake Buena Vista, FL.
Bagepalli Bharat Sampathkumaran
Reluzco George
Tseng Wu-Yang
Turnquist Norman Arnold
Binda Greg
Erickson Douglas E.
General Electric Company
Reichard Lynne
Snyder Marvin
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