| 摘要 |
A device for fastening an injection element 4 with its foot 5 in a hole of a base plate 1 of an injection head 2 of a rocket engine, the foot 5 is tapered in steps up to its end. A first shoulder 7 of the foot abuts against the base plate 1; a thread (6) screwed into the base plate 1 is present after the first shoulder 7; the thread 6 is followed by a second shoulder 8 and then by a first, smooth cylindrical piece 9. This is followed by a third shoulder 11, on which a solder ring 12 made of a gold alloy is seated. A second, smooth cylindrical piece 13, which has a solder gap 13a between it and the corresponding hole in the base plate 1, follows after the third shoulder 11 up to the end. A process for fastening the injection element 4 provides for the solder ring 12 being first placed on the third shoulder 11, after which the injection element 4 is screwed into the base plate by means of a hexagon 22, and the injection head 2 is subsequently heated to about 1,035 DEG C. under vacuum, while the solder ring 12 penetrates into the solder gap 13a. |
