Vacuum brazing method for diffuser assembly of aero-engine and diffuser assembly

• Main Authors: TIAN MEIYUN, SHANG YANTAO, HUANG BIN, JIAN YUANYUAN, CAO XIAOYAN, HUANG HUILING, ZHENG NANSONG, WANG BIN
• Format: Patent
• Language: Chinese; English
• Published: 14.01.2022
• Subjects: BLASTING; CLADDING OR PLATING BY SOLDERING OR WELDING; COMBINED OPERATIONS; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; HEATING; LIGHTING; MACHINE TOOLS; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; NON-POSITIVE DISPLACEMENT PUMPS; OTHER WORKING OF METAL; PERFORMING OPERATIONS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; SOLDERING OR UNSOLDERING; TRANSPORTING; UNIVERSAL MACHINE TOOLS; WEAPONS; WELDING; WORKING BY LASER BEAM

The invention discloses a vacuum brazing method for a diffuser assembly of an aero-engine and the diffuser assembly. The method comprises the steps that S1, a diffuser and a diffuser cover are subjected to rough machining; S2, the diffuser and the diffuser cover are subjected to pre-brazing; S3, the diffuser and the diffuser cover are subjected to finish machining in place; S4, sand blowing or abrasive paper polishing treatment is conducted on a blade-shaped hole of the diffuser cover; S5, first adhesive tape brazing filler metal adheres to the top end of a base body, not stretching into the blade-shaped hole, of a radial blade, then the diffuser cover is assembled to the diffuser, part of the base body of the radial blade stretches into the blade-shaped hole and stretches out of the end surface of the blade-shaped hole, second adhesive tape brazing filler metal adheres to the weld joint of the end surface of the blade-shaped hole, then paste brazing filler metal is added, and a prefabricated part is obtained