Shut-off device for sealing a shaft of a rotary machine and rotary machine
US11428320B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2019 |
| Grant date | Aug 30, 2022 |
| Priority date | — |
| Expiry date | Jan 13, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/46
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A shut-off device includes a housing, a central passage extending in an axial direction to surround the shaft, a ring-shaped first disk, a ring-shaped second disk arranged in the housing and parallel with and spaced apart from the ring-shaped first disk in the axial direction, and an expandable annular seal having a first side wall, a second side wall and an elastic bottom, the first side wall and the second side wall each extending in a radial direction, and the bottom connecting a radially inner end of the first side wall with a radially inner end of the second side wall, and the housing includes an inlet for a fluid to expand the seal, the first side wall of the seal arranged and clamped between the housing and the first disk and the second side wall of the seal arranged and clamped between the housing and the second disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.