In February, the first rated 200-second long-range test run of an 80-ton reusable liquid oxy-methane engine developed independently by the Sixth Academy of China Aerospace Science and Technology Group was a success!
It marked a big step towards the reusability of China’s space launch vehicle engines. The cryogenic bearings for the engine’s turbopump were developed and matched by the Shaft Research Institute.
The 80-tonne liquid oxygen methane engine is an engine designed for reusability, low cost and high performance, with a wide range of variable thrust, multiple starts, reusability, fault diagnosis and rapid test and launch capability, and a significant increase in overall engine performance, reusability and reliability.
This has placed higher demands on the performance of the bearings in terms of multiple starts and stops, long life and so on.
The Shaft Research Institute’s R&D team has carried out research on the basic scientific issues of bearing dynamics and motion simulation in unsteady state conditions during repeated use and the characteristics of high churning and shear flow-solid-thermal coupling of ultra-low temperature high-speed bearing fluids, successfully solving the key technologies of multiple start-stop and long-life ultra-low temperature bearing design and test verification.
During the commissioning period, the systems worked stably and in good condition, and the commissioning was a complete success.
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