Magnetic fluid sealing device for oscillating shaft
US11421786B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2021 |
| Grant date | Aug 23, 2022 |
| Priority date | — |
| Expiry date | Dec 10, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/43
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A magnetic fluid sealing device for an oscillating shaft includes a housing, the oscillating shaft, a first seal, a second seal, and a magnetic source. The housing includes a ball head, and a ball hinge is arranged within the housing. The oscillating shaft is swingable with the ball hinge as a center. The first seal and the second seal are arranged on both sides of the ball head. The first seal includes a first toothed ring, and the second seal includes a second toothed ring. Magnetic fluid is filled at sealing gaps between the first and second toothed rings and the ball head. The magnetic source generates a magnetic field along an axial direction of the oscillating shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.