石墨多孔介质气体轴承研究综述

The porous gas bearings can generate uniform gas pressure, support the rotor system, and have the advantages of low friction loss, great stiffness and damping characteristics, so it possesses proactive applications in rotating machinery. The key development history and characteristics of carbon-graphite porous gas bearings at home and abroad are reviewed. The structure and application characteristics of four types of porous gas bearings, radial, thrust, tilting pad, and partial porous media, are introduced. In terms of theoretical basis, static characteristics, dynamic characteristics, rotor system, and related tests, the research status and progress of key technologies of the radial porous gas bearing are discussed. The development trend of porous gas bearing materials and preparation technology is analyzed, and the future direction of porous gas bearing is pointed out, including the theoretical model coupled with velocity slip boundary conditions, the employ of double-layer porous media in the structure, and advanced detection and test technology. This paper provides technical support for the industrialization development of porous gas bearing.