Variable clearance packing ring with clips for preventing circum

Details Variable clearance packing ring with clips for preventing circum Variable clearance packing ring with clips for preventing circum

1997-12-18

2000-02-08

Knight, Anthony

Seal for a joint or juncture

Seal between relatively movable parts

Close proximity seal

277416, 277422, F16J 15447

Patent

active

060220279

ABSTRACT:
A rotary machine has a stationary component with circumferential grooves and a rotatable component, as well as annular sealing segments movable toward and away from the rotating component. To prevent circumferential displacement of the lower side annular segments by gravity forces and enable the lowermost segment in the lower housing to be moved radially inwardly, the side segments of the lower housing are supported adjacent the casing midline in a manner preventing downward movement and enabling radial inward and outward movement. Generally Z-shaped clips are disposed in the dovetail groove of the stationary component with the tab at the upper end of the clip engaging a stop on the stationary component and the radially inwardly directed tab on the lower end of the clip engaging in a recess of the segment. Consequently, the segment, upon radial inward movement, pivots the clip about an axis adjacent the casing midline, enabling radial inward and outward movement and preventing circumferential displacement.

REFERENCES:
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patent: 5509780 (1996-04-01), Synfelt
patent: 5709388 (1998-01-01), Skinner et al.

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