Card seal with conical flexible seal
US8152462B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 19, 2009 |
| Grant date | Apr 10, 2012 |
| Priority date | — |
| Expiry date | Dec 14, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2240/59
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A card seal with an annular arrangement of cards that are positioned within an annular groove of a casing, and a conical flexible seal is secured to the casing on the low pressure side of the cards. The cards and the flexible seal both includes slanted surfaces that interact during operation such that the flexible seal gap decreases with the rotor shaft and the cards are secured within the annular groove during assembly and installation of the card seal. The flexible seal blocks leakage through the cards and includes an axial extending inner end that can include an abradable material to allow for rub with the shaft while decreasing the gap to prevent leakage across the cards.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.