Sealing arrangement for fluid flow engines
US4447062A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1982 |
| Grant date | May 8, 1984 |
| Priority date | — |
| Expiry date | Dec 21, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/928
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A sealing arrangement between the shaft and housing of a fluid flow engine with a blocking gas space limited by piston rings; the blocking gas pressure is controlled by changing the effective cross section of venting bores and therewith is matched to the gas pressure to be sealed off; the change of the cross section of the venting bores is thereby automatically realized by axial displacement of the corresponding piston ring as a function of the gas, respectively, blocking gas pressure acting on the same. An axial wear at the piston ring and at the groove flank, which is present during the running-in period, is avoided subsequent thereto as a result of the decrease of the blocking gas pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.