METHOD OF LARGE-SIZE NOZZLE OF ROCKET LIQUID-PROPELLANT ENGINE (RLPE) CHAMBER Russian patent published in 2009 - IPC B23K31/02 F02K9/62 

FIELD: process engineering.

SUBSTANCE: outer and inner walls are assembled to form a chamber there between. Aforesaid chamber is sealed on the side of larger diametre with the help of circular welded seam. Temporary compensator of linear displacement seals the chamber on the side of smaller diametre. One end of the compensator is welded to inner wall, while the other one is welded to outer wall. Vacuum is produced in the chamber and inert gas pressure is created, chamber is soldered and cooled. Compensator is cut off, and its cut-off site is soldered to the other RPLE chamber nozzle unit. Compensator is made from tubular workpiece in forming torus part to be deformed in die to produce nozzle outer wall so that the size between aforesaid deformed inner surfaces equal the thickness of RPLE chamber nozzle wall pack. Compensator radius part on the larger diametre side is, then cut off.

EFFECT: lower labor input, ease of manufacture, higher tightness and strength of welded seam.

4 dwg