Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1990-04-18
1991-12-24
Cuchlinski, Jr., William A.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 3, 277 17, 277 27, 277178, 277205, F16J 920
Patent
active
050745689
ABSTRACT:
The shaft seal between a fixed housing wall (2) and a revolving shaft (1) consists of a collar (6) fixedly connected to the shaft (1), respectively one leg of the U-shaped sealing rings (69, 71) pressing against this collar. The cavities (14, 15) of the sealing rings (69, 71) can be acted upon, via connections, by a pressure medium, wherein respectively one of the legs of the sealing rings (69, 71) is pressed sealingly against the collar (6). The annular chamber (17) coaxial to the end face of the collar (6) can be filled with a lubricant and/or a coolant by way of an inlet and outlet. This structurally simple shaft seal is arranged in compact fashion. This seal operates in a safe and reliable manner. For the prevention of chemical accidents, a circulating pressure medium can be provided to act only on the sealing ring (69) located closest to the reaction chamber (3), and this pressure medium can be continuously monitored for traces from the reaction chamber (3) by way of an indicator. Upon the occurrence of a leak, the cavity (15) of the second sealing ring (71) is automatically pressurized, which then provides the further sealing action. Thereafter, an exchange or repair of the sealing unit (57) can be prepared at leisure.
REFERENCES:
patent: 2547185 (1951-04-01), Van Bolhar
patent: 3169024 (1965-02-01), Johnson et al.
patent: 3455567 (1969-07-01), Burtis
patent: 3514114 (1970-05-01), Monahan
patent: 3860270 (1975-01-01), Arnold
patent: 4067585 (1978-01-01), Rode
patent: 4358119 (1982-11-01), Kryczun
patent: 4706970 (1987-11-01), Ramirez
patent: 4718820 (1988-01-01), Jaques
patent: 4817966 (1989-04-01), Borowski
Cuchlinski Jr. William A.
DePumpo D.
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