Method for machining curved cooling passages in turbine blades and turbine blade having cooling passages

• Main Authors: BEECK, ALEXANDER, WEIGAND, BERNHARD, DR
• Format: Patent
• Language: English; French; German
• Published: 05.06.2002
• Edition: 7
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; INDEXING SCHEME FOR ASPECTS RELATING TONON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES ORJET-PROPULSION PLANTS; INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04; LIGHTING; MACHINE TOOLS; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; PERFORMING OPERATIONS; STEAM ENGINES; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TRANSPORTING; WEAPONS; WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OFELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKESTHE PLACE OF A TOOL

Verfahren zum Einbringen eines gekrümmten Kühlkanals (20) in eine Gasturbinenkomponente, insbesondere in eine Schaufel (10), mittels einer Elektrode (2), wobei eine Elektrode (2) in Form einer Wendel verwendet wird, und die Elektrode (2) um ihre zentrale Rotationsachse (R) drehbar angetrieben wird; sowie kühlbare Schaufel (10) für eine Gasturbinenkomponente mit einem schraubenlinienförmigen Kühlkanal (20). A curved cooling channel is built into a gas turbine blade (10) by means of a spiral electrode (2) driven by rotating around its axis (R) of rotation. A hollow space (28) below a platform (16) is bordered by the platform on one side and the footing (14) for the turbine blades on the other side. The electrode rotates and works into the blade material using electrical discharge machining/EDM or electrochemical boring. An Independent claim is also included for a cooling turbine blade.