嫦娥三号探测器7500N变推力发动机研制

The development of 7500 N variable thrust engine for Chang'E-3

为实现空间飞行器轨道机动、交会对接、星际软着陆等任务,采用具有大范围推力调节能力的变推力液体火箭发动机是比较理想的方案.嫦娥三号探测器采用的7500 N变推力发动机,为我国首台大范围变推力发动机,可按照飞行器的控制指令,准确、快速、无级地改变推力,来实现探测器的中途修正、近月制动及月面软着陆任务.介绍了7500 N变推力发动机的研制情况,包括发动机技术方案、关键技术攻关以及试验验证情况,试验验证和飞行情况表明,发动机设计合理、性能先进、工作可靠.

To implement orbit maneuvering, rendezvous and docking, and soft landing on planets, the throttling liquid rocket engine is preferable. The 7500 N variable thrust engine applied in the Chang＇E-3 prober is the first throttling liquid rocket engine in china. It can throttle fast with high precision and continuous variability based on the control commands. The trajectory correction and soft landing on the moon is accomplished. This paper provides the development of the 7500 N variable thrust engine, including the technique scenarios, the key technologies and the tests. The test and flight results show that the system is feasible, its performance is high and it works reliably.