Cooled structure production method - forms tube wall of small pipes with covering layer thicker at mounting flange and spark-erodes openings in pipes for coolant at flange seat

摘要

A wall (2) is produced to more than the desired length, the layer (4) being thicker at the flange than elsewhere. It is then machined to length, and a seat (5) for the flange (9) is machined in it. At the seat, holes (6) for the coolant are formed through the layer and the outside walls of the pipes (3) by spark-erosion or mechanically. The flange is then fitted onto the seat and welded to the layer, and the pipe ends are sealed off individually by welding filler-pieces (7) into them. USE/ADVANTAGE - For a back-pressure combustion chamber for hypersonic propulsion. It is simple, strong, and gives good sealing and flow characteristics, and easy inspection and repair of all joints.