Science and technology daily, Changsha, April 23 (Reporter Yu Huiyou, correspondent Jiang Dingbang and Qi Jiatan) the importance of bearing technology to aerospace equipment is equivalent to & ldquo; Chip & rdquo; The importance of electronic equipment. 23, Changsha, 2019 & ldquo; China Aerospace day; When the news media came into the centralized interview activity of Hunan University, the reporter learned that the Research Center for key components of high-end intelligent equipment of Hunan University has focused on & ldquo; High end gas suspension technology;, Strive to form independent and controllable key core parts technology and break foreign monopoly. At present, new progress has been made in the technology of ultra-high speed and ultra-high temperature dynamic air bearing and ultra-precision heavy-duty hydrostatic air bearing
Feng Kai, a professor at the school of mechanical and transportation engineering of Hunan University, introduced the basic principle of dynamic and pneumatic floating bearing technology, which is similar to & ldquo; The plane took off;. After the aircraft reaches a certain speed to the ground, it can & ldquo; Hanging & rdquo; In the air. After the rotating shaft of the rotating equipment reaches a certain speed, it can be & ldquo; Hanging & rdquo; In the air. Therefore, the dynamic pneumatic floating bearing technology can achieve the speed that cannot be reached by conventional bearing technology. At the same time, because the gas is used as the suspension medium and is not sensitive to temperature, the gas hydrodynamic bearing technology can adapt to a wide temperature range and is very suitable for the requirements of aerospace equipment for power density, speed, service life and temperature. Up to now, the air suspension high-speed gyroscope developed by the team and aerospace related institutes has a speed of 40000 rpm, and the gas suspension high-speed turbine generator has a design speed of 100000 rpm
Feng Kai also introduced & ldquo; Aerostatic bearing technology;. The basic working principle of this technology is to introduce the gas between two relatively moving objects through external high-pressure gas, separate the objects and realize non-contact suspension. The team and the Institute of space technology used static pressure gas suspension technology to simulate the space micro gravity and friction free working environment, providing ground simulation conditions for spacecraft. Several multi degree of freedom attitude simulation platforms have been designed and implemented& ldquo; In the future, with the increasing weight of spacecraft, there are higher and higher requirements for the fidelity of simulated space environment, and higher requirements for the bearing capacity and accuracy of air flotation technology. We will also carry out more systematic and detailed work in lubrication mechanism, bearing materials, structural design and system integration& rdquo;
