Magnetic fluid sealing device
US11193592B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 2021 |
| Grant date | Dec 7, 2021 |
| Priority date | — |
| Expiry date | Aug 18, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C33/82
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A magnetic fluid sealing device includes: a housing; a shaft rotatably penetrating through the housing; a first shaft sleeve made of a magnetic conductive material, and fitted over the shaft; a plurality of pole shoes arranged in the housing and fitted over the shaft and the first shaft sleeve, an inner circumferential surface of the pole shoe being provided with a plurality of pole teeth arranged at intervals in an axial direction of the shaft, the shaft and a first part of the plurality of pole teeth being arranged at intervals in a radial direction of the shaft to form a first gap, the first shaft sleeve and a second part of the plurality of pole teeth being arranged at intervals in the radial direction of the shaft to form a second gap; and a permanent magnet arranged in the housing and fitted over the shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.