REPAIR OF GAS TURBINE DIAPHRAGM

• Main Authors: MIEKUS, Marek, SZEWCZYK, Tomasz Michal, DYNAK, Krzysztof, KOWALCZYK, Michal, OSTROWSKI, Andrzej Marcin, STECKOWICZ, Piotr Jerzy
• Format: Patent
• Language: English; French; German
• Published: 31.07.2019
• Subjects: BLASTING; CLADDING OR PLATING BY SOLDERING OR WELDING; COMBINED OPERATIONS; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; ENGINE PLANTS IN GENERAL; HEATING; 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; OTHER WORKING OF METAL; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; STEAM ENGINES; TRANSPORTING; UNIVERSAL MACHINE TOOLS; WEAPONS; WELDING; WORKING BY LASER BEAM

The claimed method describes refurbishing of worn diaphragm rails (38, 39) for turbo machines. This method comprises machining the worn part of the diaphragm rails such that a clean and geometrically exact machined surface is achieved. Welding one or more layers on these machined surfaces builds up a cladding that overtops the nominal dimensions of new diaphragm (30). The method further comprises machining the cladding such that it has the nominal dimensions of a new diaphragm.