Diffusion brazing manufacture method for hydrogen peroxide thrust chamber body

Abstract

The invention provides a diffusion brazing manufacture method for a hydrogen peroxide thrust chamber body. The method specifically comprises the following steps that (a), an assembling clearance between the outer surface of the inner wall of a thrust chamber and the inner surfaces of a spray pipe outer wall and a middle section outer wall is controlled between 0.04 and 0.9mm; (b), 0.01 to 0.5mm nickel-base brazing filler metal is spot-welded on the outer surface of the inner wall of the thrust chamber, and the spray pipe outer wall and the middle section outer wall are respectively sleeved outside the inner wall of the thrust chamber; (c), the spray pipe outer wall and the middle section outer wall are respectively circumferentially located and welded with connecting semi-rings in an argon arc way, and then thrust chamber collectors are welded at the two ends of a connecting piece for the spray pipe outer wall and the middle section outer wall in an argon arc way; and (d) diffusion brazing is carried out on the outer surface of the inner wall of the thrust chamber and the inner surfaces of the spray pipe outer wall and the middle section outer wall by a positive pressure brazing furnace. The method has the advantages of simple welding technology, high reliability, stable product quality and high production efficiency.

Description

technical field [0001] The invention relates to product welding technology, in particular to a method for manufacturing a body of a hydrogen peroxide thrust chamber by diffusion brazing. Background technique [0002] The thrust chamber is an important part of the liquid rocket engine, and it is a device that realizes energy conversion to form thrust. With the improvement of engine performance requirements, the working pressure and heat load of the thrust chamber also increase significantly, requiring corresponding improvements in the material and manufacturing technology of the thrust chamber and outer walls. [0003] Such as figure 1 As shown, the thrust chamber has curved inner and outer walls, wherein the outer surface of the thrust inner wall 2 has 200-300 channels 6, and the thrust outer wall is composed of the nozzle outer wall 1 and the middle outer wall 4, and the inner and outer walls of the thrust chamber need to be welded, so that Channels 6 are formed between t...

AI Technical Summary

Problems solved by technology

At present, the welding methods used for the inner and outer walls of the hydrogen peroxide thrust chamber have the following problems: (1) Common welding methods such as fusion welding have long production cycles and high production costs; (2) Common brazing methods are difficult to form good welding quality, It cannot meet the hydraulic strength; (3) Whether it is welding or brazing, the channel formed by the inner and outer walls is easy to be blocked during the welding process, and deformation occurs after forming, which affects the thrust of the thrust chamber and eventually causes the rocket to fail.

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