Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1981-09-02
1983-08-09
Smith, Robert I.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
415115, 415116, F10D 518, F02C 712
Patent
active
043974716
ABSTRACT:
A rotary member for restricting the flow of high temperature gas from a first cavity, intermediate rotating and stationary members of a gas turbine engine, and a second cavity, includes a central disc bore segment having an inner circumference and an outer circumferential seal segment. A closed cavity is formed by a portion of the rotating member and a portion of the rotating seal disc, with the inner circumference of the central disc bore segment positioned in a predetermined spaced relation with respect to the rotating member, forming a gap therebetween. The closed cavity contains at least one aperture adjacent the outer circumferential seal segment. A portion of the high temperature gas flows through the aperture into the closed cavity, then exits the closed cavity through the gap formed between the inner circumference of the central disc bore segment and the rotating member. The gap in effect presents a constriction which causes a concomitant increase in the velocity of the gas through the gap. The high temperature gas, flowing at a relatively high velocity across the inner circumference of the central disc bore segment reduces the temperature differential between the inner circumference and the outer circumferential seal segment thereby reducing thermal stresses in the rotary seal.
REFERENCES:
patent: 3347553 (1967-10-01), Schweiger
patent: 3632221 (1972-01-01), Uehling
patent: 3635586 (1972-01-01), Kent et al.
patent: 3647313 (1972-03-01), Koff
patent: 3768921 (1973-10-01), Brown et al.
patent: 3989410 (1976-11-01), Ferrari
patent: 4067583 (1978-01-01), Germain
Burge Joseph C.
Feldman Paul S.
Radomski Michael A.
Tameo Robert P.
General Electric Company
Lawrence Derek P.
Smith Robert I.
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