Magnetic fluid sealing device
US11092241B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2021 |
| Grant date | Aug 17, 2021 |
| Priority date | — |
| Expiry date | Mar 25, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/002
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A magnetic fluid sealing device is disclosed. The magnetic fluid sealing device includes a housing, a shaft, and a magnetic sealing member. The housing has a cavity containing a magnetic fluid. One end of the shaft extends out of the housing through a first through-hole. The outer peripheral face of the shaft is provided with liquid injection grooves with one end extending out of the housing. The magnetic sealing member is located within the sealing cavity and includes at least one magnetic source and a plurality of pole shoes. The plurality of pole shoes are arranged at intervals in a length direction of the housing. The magnetic source is connected between two adjacent pole shoes. A sealing gap in communication with the liquid injection groove is defined between the plurality of pole shoes and the shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.