Thrust chamber body outer wall structure of liquid propellant rocket engine

Abstract

The invention discloses a thrust chamber body outer wall structure of a liquid propellant rocket engine. The structure comprises an expansion section outer wall (2), a throat section outer wall (3), acylindrical section outer wall (4) and a liquid collecting ring upper cover (5); one end of the throat section outer wall (3) is connected with the expansion section outer wall (2), and the other endof the throat section outer wall (3) is connected with the cylindrical section outer wall (4); the cylindrical section outer wall (4) is provided with a radial hole (7) and a liquid collecting tank (6); the liquid collecting ring upper cover (5) is connected with the cylindrical section outer wall (4) to form a liquid collecting cavity (8); and the liquid collecting cavity (8) communicates with an external inner wall groove through the radial hole (7) and the liquid collecting tank (6) in sequence. The outer wall structure has the advantages of good assembly property, improvement of the dispersion welding line quality and the like; and meanwhile, the outer wall structure also achieves the function of a liquid collecting ring, is excellent in flowing uniformity and low in pressure loss, reduces the part number, and improves the reliability of a thrust chamber body part.

Description

technical field [0001] The invention relates to an outer wall structure of a thrust chamber body of a liquid rocket engine, belonging to the field of liquid rocket engines. Background technique [0002] The connection methods of the inner and outer walls of the thrust chamber of modern advanced liquid rocket engines mainly include electroforming and diffusion welding. Compared with the electroforming method, the advantages of diffusion welding are: (1) the outer wall is a layer of high-strength alloy or special steel such as S-06, which has high strength and light weight, which can greatly reduce the weight of the body; (2) the inner and outer walls It can be produced in parallel. During the process of slotting the inner wall with the milling cutter, the outer wall can process the body and the inlet and outlet holes. After that, the welding of the inner wall and the outer wall can be completed in a few days, so the entire production cycle is relatively electroforming. The p...

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Problems solved by technology

[0003] In addition, for the liquid collecting ring on the combustion chamber side of the cylindrical section of the body of the diffusion welded thrust chamber, because it needs to bear a large pressure in the combustion chamber and the axial thrust of the engine, the liquid collecting ring is faced with strength, stiffness, flow equalization Good performance, small pressure loss and many other difficulties; and in order to avoid the thermal influence on the inner wall and outer wall of the thrust chamber, the vicinity of the diffusion welding seam is not suitable for the subsequent welding process again, which is the diffusion welding thrust chamber body. The design and manufacture of the department adds another difficulty

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