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AssigneeROLLS-ROYCE plc
InventorsIan Murray Garry, Neil Geoffrey Hufton
Estimating the term…
A method of producing cooling apertures in a combustion chamber head includes mechanically drilling a plurality of cooling apertures through the combustion chamber head from the downstream side of the combustion chamber head. A tool is inserted through at least one aperture for a fuel injector from the downstream side of the combustion chamber head and the tool is rotated about its axis while within the aperture for a fuel injector. Fluid is supplied from the drilling machine through the tool and jets of fluid are directed from nozzles in the tool with at least a radial component towards the cooling apertures on the upstream side of the combustion chamber head to remove burrs and/or caps adjacent the cooling apertures. The present disclosure enables cooling apertures to be drilled through a combustion chamber head using conventional mechanical drilling in a viable and cost effective manner.
A method of producing cooling apertures in a combustion chamber head, the combustion chamber head having an upstream side, a downstream side and at least one aperture extending there-through for a fuel injector, the upstream side of the combustion chamber head is inaccessible, the method comprising providing a drilling machine, mechanically drilling a plurality of cooling apertures through the combustion chamber head from the downstream side of the combustion chamber head, inserting a tool through the at least one aperture for the fuel injector from the downstream side of the combustion chamber head, rotating the tool about its axis whilst within the at least one aperture for the fuel injector, supplying fluid from the drilling machine through the tool, directing a jet of fluid from the tool with at least a radial component towards the cooling apertures on the upstream side of the combustion chamber head to remove burrs and/or caps adjacent the cooling apertures.
An apparatus for producing cooling apertures in a combustion chamber head, the combustion chamber head having an upstream side, a downstream side and at least one aperture extending there-through for a fuel injector, the upstream side of the combustion chamber head is inaccessible, the apparatus comprises a drilling machine for mechanically drilling a plurality of cooling apertures through the combustion chamber head from the downstream side of the combustion chamber head, a tool insertable through the at least one aperture for the fuel injector from the downstream side of the combustion chamber, a device to rotate the tool about its axis whilst within the at least one aperture for the fuel injector, the tool having at least one passage extending longitudinally through the tool, a device to supply fluid from the drilling machine through the at least one passage in the tool, the tool having at least one nozzle to direct a jet of fluid from the at least one passage in the tool with at least a radial component towards the cooling apertures on the upstream side of the combustion chamber head to remove burrs and/or caps adjacent the cooling apertures.
Dependencies are inferred from the claim text.