Hydrodynamic intershaft seal and assembly
US8100403B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 31, 2008 |
| Grant date | Jan 24, 2012 |
| Priority date | — |
| Expiry date | Aug 17, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2240/53
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A seal and seal assembly for providing a seal between an outer shaft and an inner shaft. The assembly includes a seal subassembly disposed between the shafts. The subassembly includes a split carbon ring, a solid outer ring, and a spring mechanism provided between the split carbon ring and the solid outer ring. The carbon ring is radially split into a plurality of segments having splits between ends of adjacent segments. The segments include a circumferential inner radius and a sealing dam on the circumferential inner radius. The solid outer ring includes a sealing face and a plurality of hydrodynamic grooves provided on a radial face. The spring mechanism may be configured to engage a portion of an outer diameter of the split carbon ring and a portion of an inner diameter of the solid outer ring and to urge the split carbon ring radially towards the inner shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.