Static and Dynamic Performance Analysis of Radial Hydrostatic Gas Bearings

摘要

Hydrostatic gas bearings have been widely used in industrial applications, however, the dispersion of the extremely thin gas film has always plagued engineers who want to use the computational fluid dynamics method to predict the performance of them. This paper combined the relevant modules of commercial software COMOSL Multiphysics, which avoids the problem of meshing and makes it capable of doping out hydrostatic gas bearings. Based on this, the performance of radial hydrostatic gas bearings for linear compressors were presented in detail. The results showed that the relative inlet pressure is positively correlated with the load capacity of bearings. In addition, with the increasing of the diameter of the orifices, the load capacity improves firstly and then reduces in spite of gas consumption increasing. Furthermore, load capacity and gas comsumption fluctuate under dynamic outlet pressure. Last but not least, the relative axial movement between the bearing pairs also has a certain influence on the consumption.