"Made in Xi'an" has a new breakthrough liquid oxygen kerosene engine reuse technology to enter the actual combat stage

Recently, a type of liquid oxygen and oil engine independently developed by the Xi'an Aerospace Power Research Institute for the first time realized repeated flight test verification. After participating in the first flight test as a aircraft active power device, the engine was assembled and completed again and completed the repeated flight test again. For the first time in China, the liquid rocket power was reused.

The liquid rocket engine, as the main power device of the space carrier, has full functions, high performance, high technical difficulty, long development cycle, and reusable technology for liquid rocket engines, which is essential for reusable aerospace carrier.

The liquid oxygen and oil engine is the main power device of my country's new generation of carrier rockets. It has the advantages of high performance, large thrust, non -toxic and pollution. From the beginning of the engine, the component scheme and overall layout were demonstrated according to the requirements of multiple work. All valves were working forms such as pneumatic, electric, and liquid -motion that can work multiple times. The ground development test achieved a single engine. Repeat the test 8 times.

During the "Thirteenth Five -Year Plan" period, the Xi'an Aerospace Power Research Institute pre -launched key technical research on the reuse of liquid oxygen and oil engines, achieved a large number of theoretical and experimental research results, and laid the foundation for the reuse of liquid oxygen and oil engines.

Due to the differences in the working environment of the heaven and earth and the restrictions of various guarantee conditions, the repeated ignition of the flight and the ground test of the liquid oxygen and oil engine cannot be simply drawn. There are more key technical problems that need to be overcome, mainly in the following aspects:

Multiple ignition technology. At present, my country ’s supplementary circulation liquid oxygen kerosene engine has achieved uninterrupted three -time ignition start in the ground test, and exploring the processing and pre -cold methods of the repeated ignition work room.

Large -scale change of thrust technology. To achieve a large -scale changes in the engine, you need to set up adjustment elements and drivers, and at the same time, it is required to regulate accuracy and adjust rate. In addition, the large -scale changes in working conditions have put forward high requirements for the work adaptability of main components such as thermal components such as engine thrust rooms and turbine pumps. my country's liquid oxygen and oil engines have a stepless thrust regulating power, and fully verify through the ground test car. Among them, the thrust -regulating mechanism and a large -scale thrust adjustment capacity have achieved flight verification on the new generation of Long March 8th carrier rocket.

Power, heat protection technology. Compared with the use of the carrier at one time, the reuse of the carrier not only requires the engine to work in the rising section, but also the return section must be ignited again for the carrier deceleration or landing. The heat flow conditions are even more harsh, and the research of engines and thermal protection technologies need to be carried out. The success of a certain aircraft test initially verified the effectiveness of the hydraulic oxygen engine on the use of flight power, thermal load conditions and maintenance and protection measures.

Reuse status assessment technology. The domestic liquid rocket engine ground failure diagnostic system is used earlier in the development test of liquid oxygen and oil engines, and its technology is mature. In March 2022, the actual application of the flight health monitoring system for the first time was for the first time in the new generation of the Long March 6th shipping rocket. Through the research of liquid power health diagnosis, the liquid oxygen and oil engine also carried out a large number of research work in terms of testing or flight status assessment technology.

Repeat detection and maintenance technology. The liquid oxygen and oil engine uses the research on the launch site to simplify the research and reuse the relevant maintenance processing technology research to achieve the large streamlined operation and maintenance project. After the first time, the low -temperature rocket liquid oxygen is not available.

In order to realize the short -term processing of the engine and deliver the flight again, the development team has a targeted formulation of the engine detection and maintenance solution on the basis of the research on the research on the research on the research on the research on the research of the technical topic of the liquid oxygen and oil engine. Repeated use of kerosene engines.

Text: Guan Ying, a reporter from Xi'an Newspaper, Editor Yang Xue, blame Yang Xue

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