The reporter learned from the First Affiliated Hospital of China Aerospace Science and Technology Corporation on the 10th that the first unit of the institute led the relevant domestic units. Recently, the whole forging method was used to successfully develop a heavy-duty rocket tank transition ring, breaking through the key technology of super-large diameter integral forging, even in China. The world is still the first. This marks a major problem in the development of heavy rockets and laid the foundation for subsequent development.
The heavy-duty rocket adopts a super-large diameter arrow structure design. The transition ring is located between the connecting tank section, the front and rear bottom and the rocket box section. The diameter is large, which is the key part of the force transmission, and the force is concentrated. The transition rings of the previous models are usually sectioned forged to weld the sections. The transition ring of heavy rockets has a large diameter and a special and complicated interface. It may cause flaws during welding. In the future, the task may be unpredictable due to the complicated state of the force.
In order to enhance the strength of the transition ring, the researchers used the integral forging method to gradually improve the process from the small-diameter transition ring forging, and constantly determine the appropriate process details. After more than a year of research and development, the overall forging of the transition ring was completed, which laid the foundation for the key technologies of design, manufacture and test of the super-large diameter arrow structure, and also provided technical support for the lightweight design of the heavy-duty carrier rocket structural parts.
Lei Fanpei, chairman of Aerospace Science and Technology Group, said earlier that China is accelerating the implementation of pre-research on key technologies for heavy rockets, striving to break through the overall design of heavy rockets in four to five years, as well as 460 tons of liquid oxygen kerosene engines, 220 tons of oxyhydrogen engines and 9 meters or so diameter rocket rocket structure design and manufacturing and other key technologies; complete the development of heavy rockets in 15 years or so, and strive to achieve the first flight around 2030.
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