静圧気体軸受の減衰特性の一次元モデルによる解析 : 第2報,溝付き軸受の減衰特性

概要

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To develop a gas bearing with the highest possible damping, we clarify the damping characteristics of a one-dimensional grooved gas bearing model in relation to the squeeze number σ, groove number N_g, depth G and width L_g. The bearing region between two feeding ports is divided by some grooves. From numerical analysis, it is found that N_g, G and L_g have little effect on static stiffness atσ=0. The damping B in the low-σ region decreases when N_g, G and L_g respectively become large. But B in the high-σ region increases with the increase in G and has an extremum value B_<opt> atσ_<obt_> which corresponds to the local squeeze numberσ of ten in the divided region. Thus, we can realize a high damping bearing at resonance frequency by decreasing L_g as much as possible, choosing N_g so as to tuneσ_<opt> to the corresponding natural frequency and increasing G to the limiting Value which keeps B positive in the low-σ region.
社団法人日本機械学会の論文
1992-11-25