End seal for turbine blade base
US4523890A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 19, 1983 |
| Grant date | Jun 18, 1985 |
| Priority date | — |
| Expiry date | Oct 19, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01D5/3015
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An end seal for root manifolds at the bases of air cooled turbine blades disposed in retention slots in a turbine wheel; the end seal including an annular groove in the upstream face of the wheel having an outboard cylindrical edge outboard of the root manifold, an inboard cylindrical edge inboard of the retention slots and a slot face parallel to the upstream face of the wheel; an imperforate seal ring in the annular groove with a right circular flange adjacent the outboard edge, an annular foot engaging the groove slot face inboard of the retention slots, and a body portion defining an accordion fold in transverse cross section; and seal plate segments on the wheel over the groove. The seal plate segments capture the seal ring and bias the foot against the wheel while centrifugal forces are developed during wheel rotation to thrust the cylindrical flange against the groove outboard edge for outboard sealing and to urge the accordion fold to a folded condition for more tightly thrusting the foot against the groove slot face for inboard sealing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.