CHEMICAL MILLING OF GAS TURBINE ENGINE BRISK

PROBLEM TO BE SOLVED: To provide a chemical milling method for changing the chord length (46) and/or the thickness (50) of at least one blade (18) in a gas turbine engine brisk (10) having a hub (14) and a plurality of metal blades (18). SOLUTION: At least one blade (18) of the brisk (10) is treated...

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Bibliographische Detailangaben
Hauptverfasser:	YOUNG KURT EDWARD, GUTKNECHT JAMES EDWARD, BALLMAN STEVEN MARK, STAMM EDWARD IVAN, DAVIS BRIAN MICHAEL
Format:	Patent
Sprache:	eng
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS BLASTING CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL COMBINED OPERATIONS COMBUSTION ENGINES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS DIFFUSION TREATMENT OF METALLIC MATERIAL ENGINE PLANTS IN GENERAL GAS-TURBINE PLANTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MACHINE TOOLS MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25 NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES NON-POSITIVE DISPLACEMENT PUMPS OTHER WORKING OF METAL PERFORMING OPERATIONS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS STEAM ENGINES TRANSPORTING UNIVERSAL MACHINE TOOLS WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a chemical milling method for changing the chord length (46) and/or the thickness (50) of at least one blade (18) in a gas turbine engine brisk (10) having a hub (14) and a plurality of metal blades (18). SOLUTION: At least one blade (18) of the brisk (10) is treated for a long time sufficiently for changing the chord length (46) and/or the thickness (50) of the blades (18) by a chemical etching agent for the metal forming the blades (18). In the preferable embodiment of this method, at least one blade (18) of the brisk (10) with its rotational balance lost is treated for a long time sufficiently for changing the chord length (46) and/or the thickness (50) of the blades (18) so that the rotational balance of the brisk (10) can be obtained.