关键词: 多孔质石墨, 静压轴承, 孔隙度, 渗透率

Abstract: The microstructure of graphite used to the porous aerostatic bearing is greatly complicated. From the formative mechanism of microstructure, the fractal geometry theory is adopted to study the permeability, which is very important to the performance of porous aerostatic bearing. Furthermore, the relation between the porous graphite permeability and the fractal dimension is established. And the correlation of the macroscopical parameter with the microstructure is presented. Finally, the microstructure of the porous graphite is analyzed by the program of Matlab and the permeability is obtained. The experimental results agree with the theoretical results.

Key words: Permeability, Porous graphite Porosity, Static bearing