Arc-shaped stepped magnetic fluid sealing device
US10962119B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jun 12, 2020 |
| Grant date | Mar 30, 2021 |
| Priority date | — |
| Expiry date | Jun 12, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/18
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An arc-shaped stepped magnetic fluid sealing device comprises a casing, a sealing assembly and an end cover. The sealing assembly comprises a shaft, a permanent magnet, a first pole shoe and a second pole shoe. Inner walls of the first pole shoe and the second pole shoe are both arc-shaped faces inclined towards the side where the permanent magnet is located. A sealed cavity with a larger middle and two smaller ends is enclosed by the inner wall of the first pole shoe, an inner wall of the permanent magnet, and the inner wall of the second pole shoe. A portion of the shaft that is located inside the sealed cavity matches the sealed cavity in shape. Inner walls of the first pole shoe and the second pole shoe are respectively provided with first pole teeth and second pole teeth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.