Magnetic fluid sealed bearing
US9835202B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2016 |
| Grant date | Dec 5, 2017 |
| Priority date | — |
| Expiry date | Aug 26, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C33/583
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention provides a magnetic fluid sealed bearing having a stable sealing performance and allowing easy build-in of a magnetic sealing mechanism into the bearing. A magnetic fluid sealed bearing according to the present invention includes: an inner ring and an outer ring; a plurality of rolling members disposed between the inner ring and the outer ring; a ring-shaped polar plate mounted on an inner circumferential surface of the outer ring such that a gap is produced between the ring-shaped polar plate and an outer circumferential surface of the inner ring; a ring-shaped magnet attached to an axially inner side surface of the ring-shaped polar plate, the ring-shaped magnet forming magnetic circuits on both the outer ring side and the inner ring side; and an inner ring magnetic fluid retained in the magnetic circuit on the inner ring side for sealing the gap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.