Closed type thrust dynamic pressure bearing with through hole
US5988886A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 8, 1998 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Apr 8, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2240/90
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A closed type thrust dynamic pressure bearing is capable of generating enough dynamic pressure for axially bearing a rotating member at the time of start-up without damage to an end face of a flange of the rotating member. The flange of the rotating member is housed in a housing in a closed state. V-shaped dynamic pressure generating grooves are provided at upper and lower end faces of the flange, while a plurality of holes axially passing through the flange are provided radially inside an annular region where the dynamic pressure generating grooves are provided. The total sum of cross-sectional areas of the holes is at least 1/30 of the area of the annular region. Oil sumps are provided at a receiving surface of the housing opposite to the lower end face of the flange.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.