Fixing system for injection unit in base plate of rocket motor

摘要

The fixing system, designed for attaching a rocket motor injection unit (4) by its base (5) to a hole in a base plate (1), has the injection unit made, in sequence, with a first shoulder (7). There is a threaded section (6) which is screwed into the base plate, an additional shoulder (8) followed by a smooth cylindrical section (9), a brazing ring (12) and a smooth cylindrical section (13).The injection unit and/or the base plate is/are made from an alloy such as Inconel 718 or similar, while the brazing ring is of a gold alloy or equivalent material, heated to 1035 deg C in a vacuum furnace to melt it so that it penetrates into a brazing gap (13a)