Seal construction for fluid swivel joints incorporating a free-f

Details Seal construction for fluid swivel joints incorporating a free-f Seal construction for fluid swivel joints incorporating a free-f

1984-01-27

1986-07-29

Arola, Dave W.

Pipe joints or couplings

With heating or cooling

285 98, 285108, 285136, 285351, 277 22, 277 24, 277 27, F16L 5300

Patent

active

046028064

ABSTRACT:
A seal arrangement for a fluid swivel joint such as is commonly used on offshore loading terminals for tankers. The sealed fluid joint includes first and second adjacent joint rings which are rotatable relative to each other about a common central longitudinal axis. The joint rings have a small annular, ring-shaped clearance gap therebetween to allow relative rotational movement, and one of the rings includes an annular seal housing groove facing the clearance gap. An annular seal is positioned in the seal housing groove, and its componets include a pliant annular, sealing member and an adjacent free-floating anti-extrusion ring to prevent the pliant sealing member from being deformed into the clearance gap by a relatively high fluid pressure differential existing across the seal. An oil injection system circulates a flow of oil between a sealing face on one of the joint rings and the contacting surfaces of the sealing member and anti-extrusion so as to remove generated heat and any seal wear debris from the seal arrangement.

REFERENCES:
patent: 3049877 (1962-08-01), Sherman
patent: 3411811 (1968-11-01), Holland
patent: 3429588 (1969-02-01), Nelson
patent: 4154446 (1979-05-01), Usry
patent: 4234215 (1980-11-01), Wilson
patent: 4405162 (1983-09-01), Williams
patent: 4477085 (1984-10-01), Bridger et al.

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