The reporter learned from the Sixth Institute of China Aerospace Science and Technology Corporation on the 4th that China’s three-type liquid engine, which will be used for heavy rockets, is carrying out key technical research and in-depth demonstration programs. It has completed multiple rounds of core components and component-level joint thermal tests. Among them, the 500-ton engine can complete the production and assembly of the prototype in 2018. Liu Zhirang, deputy to the National People's Congress and president of the Sixth Court, told reporters at the Science and Technology Daily that the three types of new liquid rocket engines recommended for heavy launch vehicles are 500-tonne liquid oxygen kerosene engines, 200-tonne and 25-tonne liquid-oxygen liquid hydrogen engines, respectively. Used as primary, secondary, and tertiary for heavy rockets. The three engines are aimed at world-class standards in terms of thrust, specific impulse, and thrust-to-weight ratio. It is understood that heavy-duty rockets are necessary for large-scale space infrastructure construction, deep-space exploration, and manned moon landings in China in the future. They are important signs for China to complete the building of aerospace power. It is planned to fly before 2030. . With the development and implementation of new generation rockets such as the Long March 5th, 6th, and 7th, China's new rocket power technology has already established a certain foundation and is maturing. However, heavy-duty rocket fluid power development still faces some pressure. Liu Zhirang said that the transition from the current 120-ton engine to the 500-ton engine is not a simple enlargement, but the technical difficulty has grown geometrically. For example, increasing the level of force has greatly increased the flow rate, pressure, and heat flow of combustion devices. It has brought great challenges to structural design, thermal protection, and heat conduction technologies. It has also proposed material strength, sealing process, and work reliability. Very high demand. In addition, due to the great changes in the parameters brought about by the push of power level enhancement, the current test and verification facilities cannot fully meet the research and development requirements, and cannot fully perform 1:1 full load test verification. Therefore, some technologies and products can only be simulated and reduced. Compared with verification, this has brought great difficulties to the project. It is reported that while carrying out key technologies for heavy rocket power, the Sixth Institute of Aerospace is actively promoting projects with related organizations and strives to deliver the products within 8 years after the project is established. Ductile Iron Sand Castings,Sand Casting,Malleable Cast Iron Sand Casting Product,Cast Iron Sand Casting Hebei Chunfeng International Trade Co., Ltd , https://www.chunfengenergy.com