Air cap for nozzle of high velocity oxy-fuel flame spraying burner, has chamber narrowed by air cap body, where region of body facing chamber is made of material that is thermally resilient than aluminum and have specific melting point

• Main Authors: HEINRICH, PETER, KROEMMER, WERNER
• Format: Patent
• Language: English; German
• Published: 07.08.2008
• Subjects: APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; ATOMISING APPARATUS; BLASTING; BURNERS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; COMBUSTION APPARATUS; COMBUSTION PROCESSES; DIFFUSION TREATMENT OF METALLIC MATERIAL; HEATING; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; NOZZLES; PERFORMING OPERATIONS; SPRAYING APPARATUS; SPRAYING OR ATOMISING IN GENERAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; WEAPONS

The cap (100) has an air cap chamber (20) narrowed by an air cap body (10), where a flame jet (50) produced by high velocity oxy-fuel flame spraying is conducted via the chamber. A region (12) of the body facing the chamber is made of a material e.g. brass, copper, or copper-brass alloy, that is thermally resilient than aluminum and have a melting point over 660 degrees Celsius. An inlet (30) supplies a spraying material (40) into the chamber, where a region of the body that is in contact with the spraying material is made of a wear-resistant material e.g. hard metal or silicon carbide. An independent claim is also included for a nozzle with a supplying device for supplying gases in an air cap chamber. Um eine Luftkappe (100; 100') zum Hochgeschwindigkeits-Flammspritzen (H[igh]V[elocity]O[xy-Fuel]F[lame Spraying]), aufweisend mindestens eine durch mindestens einen Luftkappenkörper (10;10') begrenzte Luftkappenkammer (20; 20'), durch die mindestens ein beim Hochgeschwindigkeits-Flammspritzen erzeugter Flammstrahl (50) geleitet wird, so weiterzubilden, dass die Luftkappe (100; 100') auch bei höherer Flammstrahltemperatur, beispielsweise bei einer Flammstrahltemperatur oberhalb von etwa 660°C, nicht schmilzt, wird vorgeschlagen, dass zumindest der der Luftkappenkammer (20; 20') zugewandte Bereich (12; 12') des Lufkappenkörpers (10; 10') im Wesentlichen aus mindestens einem Material ist, das thermisch belastbarer als Aluminium ist.