Non-contacting, gap-type seal having a ring with a patterned mic

Details Non-contacting, gap-type seal having a ring with a patterned mic Non-contacting, gap-type seal having a ring with a patterned mic

1990-07-17

1992-02-25

Cuchlinski, Jr., William A.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

384123, F16J 1534, F16C 1704

Patent

active

050907123

ABSTRACT:
A seal face of a ring used in a non-contacting, gap-type seal having an annular groove area with microdams, each having a preferable width of about 0.025 inches, between a plurality of groove surface areas. The microdams provide a boundary to the groove surface areas whereby the recess of each groove surface area bounded by the microdams acts as a unitary pressure zone and the pressure in the separate zones decreases in a series of steps as measured from one circumference of the ring to the other circumference.

REFERENCES:
patent: 3572730 (1971-03-01), Otto
patent: 3586340 (1971-06-01), Otto
patent: 3638957 (1972-02-01), Marsi
patent: 3744805 (1973-07-01), Heinrich
patent: 3804424 (1974-04-01), Gardner
patent: 3973781 (1976-08-01), Grorich
patent: 4212475 (1980-07-01), Sedy
patent: 4290611 (1981-09-01), Sedy
patent: 4420162 (1983-12-01), Yanai et al.
patent: 4423879 (1984-01-01), Takenaka et al.
patent: 4789250 (1988-09-01), Schluter
"A New Self-Aligning Mechanism for the Spiral-Groove Gas Seal Stability": by Josef Sedy, ASME paper presented Oct. 1979.

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