Retractable segmented packing ring for fluid turbines having gra

Details Retractable segmented packing ring for fluid turbines having gra Retractable segmented packing ring for fluid turbines having gra

1997-05-27

1999-08-10

Kim, Harry C.

Seal for a joint or juncture

Seal between relatively movable parts

Close proximity seal

277422, F16J 15447

Patent

active

059346841

ABSTRACT:
A segmented seal ring and spring system for steam turbines for minimizing leakage between rotating and stationary components, and preventing damage and wear thereto, with a single gravity spring contained in the lower half seal ring segment to produce an upward force which neutralizes the downward force caused by the weight of all the packing segments; so that only a small fluid pressure force is required to close the lower seal segments; the various segment lenths being adjustable to optimize closure sequence; with pairs of adjacent seal ring segments being optionally hinged to optimize proper motion capability, and individual segments optionally having one or more seal teeth removed to optimize motion capability; with adjacent pairs of ring segments optionally being slideably pinned to force simultaneous radial motion.

REFERENCES:
patent: 5395124 (1995-03-01), Brandon
patent: 5464226 (1995-11-01), Dalton
patent: 5603510 (1997-02-01), Sanders

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