For the first time in China, high-speed heavy-load low-temperature self-lubricating ceramic bearings are used on liquid hydrogen turbo pumps
The product research and development team of China HEGD Special Ceramic Bearing Technology Group undertook the pre-research and engineering prototype technical research tasks of ceramic bearings for low-temperature and heavy-load turbo pumps of Changzheng 5 rocket core and upper-level engines. High-speed heavy-duty low-temperature self-lubricating ceramic bearings are used.
The team gave full play to the previous research accumulation in the application foundation of ceramic bearings, and overcome the ultra-low temperature matching design technology of ceramic bearings, low damage and high precision manufacturing technology of ceramic balls, self-lubricating cage materials and solid lubrication technology of transfer film, bearing friction pair Core technologies and processes such as matching surface strengthening technology have broken through the core technologies of high-speed, heavy-load, impact, ultra-low temperature, and solid lubricated bearings, greatly improved the key indicators of rocket engine bearings, and established corresponding technical specifications for the new generation. The high-thrust hydrogen-oxygen rocket engine provides core technical support, which has made important contributions to the pre-research, scheme improvement, long-range test run and technical finalization of the Long March V rocket engine, and also provided advanced technology for the development of larger thrust rocket engines in China. basis.