Sealing device and compressor
US11035471B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2018 |
| Grant date | Jun 15, 2021 |
| Priority date | — |
| Expiry date | Aug 17, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2240/55
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A sealing device includes a ring part, a first fin group that together with a first outer peripheral surface forms a clearance, and a second fin group of which the front end is positioned farther radially inward than the first outer peripheral surface and which together with a second outer peripheral surface forms a clearance. The ring part has a first gas supply channel capable of supplying a first sealing gas to the first fin group, a second gas supply channel capable of supplying a second sealing gas to the second fin group, and a mixed gas discharge channel capable of discharging a mixed gas of the first sealing gas and the second sealing gas from between the first fin group and the second fin group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.