Variable clearance packing ring with clips for preventing circumferential displacement
US6022027A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1997 |
| Grant date | Feb 8, 2000 |
| Priority date | — |
| Expiry date | Dec 18, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/442
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.