Dynamic pressure pneumatic bearing device and manufacturing method thereof
US5769544A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 24, 1996 |
| Grant date | Jun 23, 1998 |
| Priority date | — |
| Expiry date | Sep 24, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C17/026
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A dynamic pressure pneumatic bearing device has a groove for generating a dynamic pressure and formed on an inner circumferential face of a rotating shaft or an outer circumferential face of a fixed shaft; each of these shafts being formed by an aluminum alloy; and a wear resisting film formed on each of the inner circumferential face and the outer circumferential face. Another dynamic pressure pneumatic bearing device is constructed by a rotating shaft having a cylindrical hollow and a fixed shaft inserted into this hollow. The fixed shaft has a bearing face opposed to an inner circumferential face of the rotating shaft and separated from this inner circumferential face with a predetermined clearance. Herringbone grooves for generating a dynamic pressure and recessed portions having the same depth as the herringbone grooves are formed on the bearing face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.