Hydrodynamic gas bearing and manufacturing method thereof
US6256885A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2000 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | May 22, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T82/10
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydrodynamic gas bearing structure which can effectively prevent the half speed whirl phenomenon and prevent wear at the time of activation or stopping of rotation is implemented in a simple manner. The hydrodynamic gas bearing has a shaft body having an outer periphery, and a cylindrical bearing body opposing to the shaft body with a space maintained in the radial direction. The shaft body has a hollow portion extending in the axial direction. In a cross section vertical to the axial line of the shaft body, the hollow portion has a not-complete-round, symmetrical shape with respect to a line passing through the center of the cross section, for example, an approximately regular triangular shape. As a first distance from the center of the cross section to an outline corresponding to an inner periphery of the hollow portion changes along the peripheral direction of shaft body, the second distance from the center of the cross section to an outline corresponding to the outer periphery of shaft body changes along the peripheral direction of shaft body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.