Tandem seal device
US8585060B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2008 |
| Grant date | Nov 19, 2013 |
| Priority date | — |
| Expiry date | Sep 8, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/40
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A mechanical seal device for obtaining appropriate sliding properties under any conditions, such as a pressure of seal is low or high. Both first grooves 463 and second grooves 464 are formed on a sliding face 46 of a stationary ring 46. The first grooves which are not in communication externally and act for reducing contact resistance of a sliding face by a dynamic pressure action when a rotary shaft rotates, the second grooves act for reducing the contact resistance of the sliding face constantly by introducing a pressure from external. Thus, a mechanical seal device which is available to seal sealed fluid under an appropriate dry contact status wherein a sliding face load is reduced in any condition can be provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.