Influence of Brazing Process Parameters on the Strength of Liquid Rocket Engine Brazed Structures

4th International Conference on Mechanical and Aeronautical Engineering

机械制造;航空航天工程

Aminov, A.B.^1 ; Dubrovsky, K.E.^2

NPO Energomash Named after Academician V.Glushko, JSC, Burdenko st., Khimki, Russia^1

Main Specialist of Brazing and Welding Department, NPO Energomash Named after Academician V.Glushko, JSC, Burdenko st., Khimki, Russia^2

关键词: Brazing parameters;    Heating and cooling;    Homogenizing annealing;    Liquid rocket engines;    Structural elements;    Temperature changes;    Theoretical calculations;    Thermal interaction;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/491/1/012034/pdf
DOI  :  10.1088/1757-899X/491/1/012034

学科分类：航空航天科学

来源: IOP

【 摘 要 】

The article addresses the issues of brazing parameters optimization: mediums; pressure; rate of temperature change; transition from one rate of temperature change to another one; the excess pressure in the cavity of the installation with respect to the medium pressure in the brazing cavity. Impact of the parameters is demonstrated by the examples of the engine gimbal flange, booster pump unit rotor and guide vanes of the turbo-pump unit pump. Improvement in the quality of the soldered joints of the flange can be achieved by introducing homogenizing annealing after brazing. A theoretical calculation of the nonstationary temperature distribution in the structural elements during soldering was preliminarily carried out to solve the problem of soldering the guide apparatus. The calculation resulted in that a reduction in the rate of heating and cooling, and temperature exclusions were excluded. The problem of an impregnated rotor of the booster aggregate was solved by analyzing the thermal interaction of the brazed components, which determined the need for a slow rate of the initial stage of heating the rotor and introducing a soak in temperature.