大推力氢氧发动机关键制造技术

Key manufacturing technology for large thrust LH_(2)/LOX cycle engine

为了满足大推力、大尺寸220 tf补燃循环氢氧发动机的研制需求,针对补燃氢氧发动机推力室、预燃室、涡轮泵、阀门、管路等组合件,开展大推力氢氧发动机的工艺技术攻关,采用旋压成形、扩散钎焊、惯性摩擦焊、增材制造、粉末冶金、精密铸造等工艺技术,实现了220 tf补燃循环氢氧发动机复杂构件的制造;针对220 tf补燃循环氢氧发动机超大、超重零部组件,开展高精密装配技术研究,采用自动化装配、数字化装配及自动测量与定位等工艺技术,实现了超大超重零部组件的精密装配。通过工艺技术研究,研制出首台220 tf补燃循环氢氧发动机工程样机,提高了我国氢氧发动机整体制造水平,满足了我国新一代运载火箭的研制需求。

In order to meet the needs of large thrust and large size 220 tf staged combustion cycle LH_(2)/LOX engine,the research on process and technology of LH_(2)/LOX engine was carried out for thrust chamber,precombustion chamber,turbopump,valve,pipeline and other systems of LH_(2)/LOX engine.The key components of 220 tf staged combustion cycle LH_(2)/LOX engine were manufactured by using spinning forming,diffusion brazing,inertia friction welding,additive manufacturing,powder metallurgy and precision casting and other processes.The research on high precision assembly technology was carried out for the large and heavy components of the 220 tf thrust LH_(2)/LOX staged combustion cycle engine,the precision assembly of the large and heavy components was realized by using automatic assembly,digital assembly,automatic measurement,positioning and other process.Through the process and technology research,the first engineering prototype of 220 tf high-pressure staged combustion cycle LH_(2)/LOX engine was successfully developed,which improved the overall manufacturing level of LH_(2)/LOX engine and met the development requirements of a new generation of launch vehicle.