Processing method of large arc surface volute liquid collector for thrust chamber of liquid rocket engine

Abstract

The invention discloses a method for processing a large-cambered-surface volute liquid collector for a liquid rocket engine thrust chamber. Inner cavity arc surfaces are processed by three special cutters and a special cutter base step by step, wherein the middle arc segment cutter performs cutter feeding processing on the inner side of a middle arc segment by a vertical mode; the middle arc segment cutter performs cutter feeding processing on the outer side of the middle arc segment by an inclined mode; the outside arc segment cutter performs cutter feeding processing on an outside arc segment by an inclined mode; and the inside arc segment cutter performs cutter feeding processing on an inside arc segment by a vertical mode. By the step-by-step process, the stability is high and the processing qualified rate of parts can reach more than 98%; and the method is simple in process, high in processing efficiency and suitable for batch production. Compared with the traditional process method, the method for processing the large-cambered-surface volute liquid collector for the liquid rocket engine thrust chamber, provided by the invention, has the advantages that the quality of the parts is higher and the reliability is higher.

Description

technical field [0001] The invention relates to the technical field of processing liquid collectors for thrust chambers of liquid rocket engines, in particular to a method for processing large-arc volute liquid collectors for thrust chambers of liquid rocket engines. Background technique [0002] The liquid rocket engine is the power device of the aerospace vehicle, and the engine thrust chamber is its important component. The thrust chamber is mainly composed of the thrust chamber head, the thrust chamber body and the nozzle extension. The liquid collector is one of the important parts of the thrust chamber. It is a collection device for liquid propellant. Its main function is to collect the propellant before the propellant enters the main structure of the head or body, so as to ensure the uniformity of the propellant entering the main cavity. sex. [0003] The liquid collector in the thrust chamber of liquid rocket engine is mostly made of stainless steel. According to di...

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Problems solved by technology

[0005] 1) Different positions of the steel pipe are subjected to different forms of force during cold deformation bending. The inner side of the liquid collector is subjected to extrusion force, which causes the side wall thickness to become thicker, and the outer side is subjected to tensile force to cause the side to become thinner. The wall of the liquid collector uneven thickness

In addition, the cold deformation bending process will cause deformation of the section of the liquid collector, which cannot guarantee the roundness of the section of the liquid collector, and the diameter and roundness of the ring of the liquid collector cannot be guaranteed;

[0006] 2) When argon arc welding is used to butt weld the elbow, due to local heating, local deformation will occur at the welding place. In addition, oxide scales may be formed on the inner surface of the welding place, and the risk of excess material will be generated when the oxide scales fall off;

[0007] 3) It is difficult to ensure the consistency of the liquid collector gap by the cutting process, which may lead to problems such as local lamination when welding with other components;

[0008] 4) There are certain defects in the various processes used in the traditional processing method of the liquid collector, which greatly reduces the pass rate of parts production, and the process flow is too cumbersome to affect the processing progress, which is not conducive to the stable production of products

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