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US 5,470,198 AGranted
Sealing structures for gas turbine engines
AssigneeROLLS-ROYCE plc
InventorsIan W. R. Harrogate, David H. Taylor, Arthur B. Griffin, David W. Tuson
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AssigneeROLLS-ROYCE plc
InventorsIan W. R. Harrogate, David H. Taylor, Arthur B. Griffin, David W. Tuson
Estimating the term…
A cooling and sealing arrangement in a gas turbine engine comprises a seal assembly extending between nozzle guide vanes and combustion chamber discharge nozzles. The nozzle guide vanes have platforms having extensions which in one embodiment overlap the downstream ends of the discharge nozzles. Cooling air is supplied to the upstream edge portions of the platforms through holes in flanges on the discharge nozzles. The seal assembly defines a chamber adjacent the platform extensions which is supplied with cooling air through metering holes in the seal assembly which provides part of a boundary for a cooling air chamber, the boundary of the chamber having cooling air holes for metering cooling air into the chamber to cool the upstream portion of the nozzle guide vane outer platforms. Cooling air exits the chamber through holes in the platform extensions to film cool them.
A seal assembly for sealing between a flow discharge nozzle means and an array of nozzle guide vane outer platforms located downstream of the nozzle means, the nozzle guide vane outer platforms having upstream portions extending towards the downstream end portion of the nozzle means, a downstream portion of the seal assembly comprising means for sealingly engaging a location member on the nozzle guide vane outer platforms and an upstream portion of the seal assembly comprising means for sealingly engaging the nozzle means and providing part of a boundary for a fluid air chamber means, the boundary of the chamber means having holes therein for metering a fluid flow into the chamber means to condition the upstream portions of the nozzle guide vane outer platforms.
A seal assembly for sealing between combustion discharge nozzle means and an array of nozzle guide vane outer platforms located downstream of the discharge nozzle means in an axial flow gas turbine engine, the outer platforms having upstream portions extending towards the downstream end of the discharge nozzle means, a downstream end portion of the seal assembly being sealingly attached to location members on the outer side of the outer platforms and an upstream end portion of the seal assembly comprising mutually parallel axially extending flange means defining a slot for slidingly receiving therein an axially extending portion of the downstream end of the discharge nozzle means, a downstream facing portion of the flange means sealingly cooperating with the upstream edges of the outer platforms to define therewith a substantially continuous gas passage wall.
A seal assembly for sealing between combustion discharge nozzle means and an array of nozzle guide vane outer platforms located downstream of the discharge nozzle means in an axial flow gas turbine engine, the nozzle guide vane outer platform having upstream portions extending towards a downstream end portion of the discharge nozzle means, a downstream portion of the seal assembly comprising means for sealingly engaging a location member on the nozzle guide vane outer platforms and an upstream portion of the seal assembly comprising means for sealingly engaging he discharge nozzle means and providing part of a boundary for cooling air chamber means, the boundary of the chamber means having cooling air holes therein for metering cooling air into the chamber means to cool the upstream portions of the nozzle guide vane outer platforms.
An axial flow gas turbine engine including combustion discharge nozzle means, an array of nozzle guide vanes located downstream of the discharge nozzle, and a seal assembly for sealing between a downstream end of the discharge nozzle means and an outer platform of each nozzle guide vane, the outer platform having an upstream portion extending towards the downstream end of the discharge nozzle means, a downstream end portion of the seal assembly being sealingly attached to a location feature on the outer side of each outer platform and an upstream end portion of the seal assembly comprising mutually parallel axially extending flange means defining a slot for slideably receiving therein an axially extending portion of the downstream end of the discharge nozzle means, a downstream facing portion of the flange means sealingly cooperating with the upstream edge of the outer platform to define therewith a substantially continuous gas passage wall.
Dependencies are inferred from the claim text.