Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1990-03-12
1993-10-05
Cuchlinski, Jr., William A.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 22, 277 81R, 277 961, F16J 1532
Patent
active
052498123
ABSTRACT:
This invention relates to barrier seal systems for sealing the annular space between a housing and a rotating shaft which extends through a bore in the housing. The seal system has inboard and outboard mechanical end face seals. The inboard seal faces have spiral grooves for pumping a buffer fluid from a buffer chamber between the two seals toward the high pressure side of the inboard seal. The primary ring of the inboard seal may be double balanced. For high pressure applications, the buffer fluid may be pressurized and a pumping ring may be included in the outboard seal to circulate buffer fluid. High pressure applications also require two hard seal rings and optimum dam and face widths. Buffer fluid can be supplied to the seal system by a reservoir connected by a gravity feed line. A buffer fluid containment device may be attached to the high pressure side of the seal to prevent process fluid from contaminating the seal faces or secondary seals.
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Hosanna Richard
Netzel James P.
Volden Douglas J.
Cuchlinski Jr. William A.
DePumpo Daniel G.
John Crane Inc.
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