Rotary face seal with magnetic puller loading
US11441685B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 13, 2017 |
| Grant date | Sep 13, 2022 |
| Priority date | — |
| Expiry date | Jul 22, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3268
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The rotary face seal with magnet loading replaces known spring mechanisms with magnetic technology that provides a consistent load with minimal variation, which is not affected by natural frequency and material fatigue due to cyclic loading. This improves seal performance and service life. The tubular magnetic ring is advantageous because it replaces existing seals within stationary cartridge with a puller type magnetic assembly design that results with the stationary cartridges being an exact exchange. The use of magnetic technology attached to the outside diameter of the rotating mating ring, which is attached to the shaft, that does not produce eddy currents because it is of a single pole configuration. The single pole magnetic assembly design is achieved by either axial or radial magnet orientation, such as in the form of a tubular magnetic band locating in a circumferential notch in the rotating mating ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.