Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1978-05-24
1980-08-26
Smith, Robert I.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 70, 277236, 417 55, 417 70, F16U 1544
Patent
active
042192013
ABSTRACT:
An assembly for sealing an interface between a high pressure steam chest or chamber and a casing, wherein high pressure steam flows from the steam chest into the interior of the casing. The assembly comprises a sealing element extending through the interface for preventing direct contact between the high pressure steam and the interface, and joined to the steam chest so that a steam tight joint is developed therebetween. The assembly further comprises an auxiliary chamber defined by the steam chest, the casing, and the sealing element in communication with the interface between the steam chest and the casing; a first passageway having one end in communication with the interior of the casing and a second end in communication with the auxiliary chamber, for passing steam from the interior of the casing to the auxiliary chamber; and means for developing a pressure differential across the first passageway so that the steam pressure at the second end of the passageway is less than the steam pressure at the first end of the passageway. A low pressure region is provided having a steam pressure lower than the steam pressure in the steam chest; and a second passageway is provided, having one end in communication with the auxiliary chamber and a second end in communication with the low pressure region for passing steam from the auxiliary chamber to the low pressure region.
REFERENCES:
patent: 2678838 (1954-05-01), Richardson
patent: 2740647 (1956-04-01), Van Pelt
patent: 3472518 (1969-10-01), Harlan
patent: 3477385 (1969-11-01), Tangeman
patent: 3501089 (1970-03-01), Alford
patent: 3630529 (1971-12-01), Ball
patent: 3927889 (1975-12-01), Adams
patent: 4089535 (1978-05-01), Sattinger
Carrier Corporation
Daley Donald F.
Sensny John S.
Smith Robert I.
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