表面目づまりを有する多孔質環状スラスト静圧気体軸受の特性および最適設計法に関する研究

概要

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We numerically analyzed the dynamic characteristics of an externally pressurized porous annular thrust gas bearing which has a thin restricted layer on the porous surface. As a result, it was found that the surface-restricted layer had such an important effect in that it increases stiffness and shifts the positive maximum value of damping from a high-frequency region to a low-frequency region. It can also reduce the magnitude of negative damping in the low-frequency region. Under the conditions of allowable static stiffness and the local minimum value of dynamic stiffness, we derived the unique relationships between the design parameters and the squeeze number that can provide the maximum damping ratio. Considering the mass parameter of the body supported by the bearing, we propose an optimal design method for maximizing damping ratio at the natural frequency, while maintaining the required stiffness in the low frequency region.
一般社団法人日本機械学会の論文
1997-02-25