Daimler Chrysler Ag

Daimlerchrysler Aerospace Ag

Bernhard Stahn

Rudiger Ewald

Hans-Joachim Klotz

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.degree. C. under vacuum, while the solder ring 12 penetrates into the solder gap 13a.

Device and process for fastening an injection element in the injection

An injection head for rocket engines, in the combustion chambers of which one or more liquid propellants are chemically reacted to generate thrust, with a plurality of injection elements as well as with a distribution chamber arranged before these injection elements in terms of flow. The distribution chamber is divided into two chambers connected in series in terms of flow by means of a separator plate arranged at right angles to the longitudinal direction of the engine. The separator plate has a plurality of openings, each with a different flow cross section and with a defined direction of flow, wherein each opening is associated with one or more injection elements.

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Ebenhausen, Germany

Bernhard Stahn