Hydrodynamic face seal with lift pads
US4738453A · kind A · utility
87Cited by
5References
5Claims
0Family size
Inventor
Key dates
| Filing date | Aug 17, 1987 |
| Grant date | Apr 19, 1988 |
| Priority date | — |
| Expiry date | Aug 17, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3432
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An end face seal assembly having a seat and a nosepiece rotating relative thereto in which the nosepiece is fitted with a plurality of recesses that carry stool-like pads therein that operate as lift pads. A fluid dam is provided in association with the nose piece adjacent the lift pads. Essentially the lift pads have leg ligaments that permit the pads to rock under the action of pressure and friction to develop a wedge-like lift between the nosepiece and the seat. The ligaments may also be made flexible in a third direction to allow the pads to be equally loaded and be capable of adjusting for shaft misalignment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.