Capillary magnetic-liquid sealing device
US11300211B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 2021 |
| Grant date | Apr 12, 2022 |
| Priority date | — |
| Expiry date | Sep 7, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/43
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A capillary magnetic-liquid sealing device includes: a housing having a shaft chamber; a rotating shaft arranged in the shaft chamber; a first pole shoe and a second pole shoe fitted over the rotating shaft and spaced apart in an axial direction of the rotating shaft; a permanent magnet fitted over the rotating shaft and located between the first pole shoe and the second pole shoe; a first magnetically nonconductive capillary block and a second magnetically nonconductive capillary block fitted over the rotating shaft and spaced apart in the axial direction of the rotating shaft. A first capillary cavity is formed among the first magnetically nonconductive capillary block, the first pole shoe and the rotating shaft; and a second capillary cavity is formed among the second magnetically nonconductive capillary block, the second pole shoe and the rotating shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.