Mechanical seal with enhanced face stability
US7959156B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2007 |
| Grant date | Jun 14, 2011 |
| Priority date | — |
| Expiry date | Dec 10, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3468
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A seal assembly for use with a rotating shaft comprises a seal ring, a seal ring shell and bellows. The seal ring defines an axially extending annular surface and a radially extending seal face. The seal ring shell includes a foot portion connected to a radially extending shin portion located radially outward of the foot portion. The foot portion defining an axially extending engagement surface in interference-fit engagement with the annular surface of the seal ring. The engagement surface is positioned so as to have a near-zero moment about the center of gravity of the seal ring due to the engagement. The bellows defines an effective diameter at zero pressure applied on the seal ring. The interface of the foot portion with the seal ring defines an interference diameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.