Thrust chamber body assembly welding machining process and spacecraft thrust chamber

Abstract

The invention provides a thrust chamber body assembly welding machining process and a spacecraft thrust chamber. The thrust chamber body assembly welding machining process comprises the steps of preparing a combustion chamber blank through 3D printing, sleeving the position of a throat of the combustion chamber blank with a fixing sleeve to enable the fixing sleeve to be positioned on the surfaceof the throat, fixing the fixing sleeve and the throat together through laser welding to obtain a combustion chamber, and connecting the combustion chamber and a divergent section obtained through secondary pressurization treatment together in a welding manner to obtain a thrust chamber body assembly. Compared with the prior art, the thrust chamber body assembly welding machining process and the spacecraft thrust chamber have the advantages of simple process, short manufacturing period, cost saving, mass production, production capacity improvement, and the like.

Description

technical field [0001] The invention relates to the technical field of spacecraft engines, in particular to a thrust chamber body component welding process and a spacecraft thrust chamber. Background technique [0002] The spacecraft engine technology has been rapidly upgraded with the development of the aerospace industry. As the main component of the engine, the thrust chamber is the key component to complete the energy conversion of the propellant and generate thrust. Among them, the thrust chamber body is the part responsible for the mixed combustion of fuel in the spacecraft engine to generate high-temperature and high-pressure gas, and then the gas is accelerated and discharged through the throat to obtain reverse thrust. The body of the thrust chamber is a Laval-shaped structure, and the thrust chamber can usually be cooled by regenerative cooling technology. The thrust chamber is composed of the inner wall and the outer wall of the milling groove, and a plurality o...

AI Technical Summary

Problems solved by technology

[0003] At present, there are two methods for connecting the inner wall and the outer wall of the milling groove. One is to use the instantaneous liquid phase diffusion brazing and electroforming nickel process, but this process has the disadvantages of complex process, expensive process and long cycle time.

The other is that the thrust chamber adopts hot isostatic pressure diffusion welding of dissimilar alloys of copper and steel during the preparation process. However, during the production process, it often happens that the convex ribs on the inner wall cannot withstand the high pressure and are bent, causing the channel to collapse. , but the pressure is too small to complete the reliable connection between the convex rib and the outer wall

Images