多孔質材料を用いた液膜シールの動特性

概要

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The linear stiffness and damping coefficients of a fluid film in a seal clearance are theoretically investigated in the laminar regime. In this study, the porous materials are applied to the annular plain seals employed in the pumps by insertion into the inlet part of the seal. The modified Reynolds equation, including a so-called filter term, and the pressure equation obtained from Darcy's law, are applied to the system and are numerically solved. Under the same conditions, the annular plain seals with the porous materials have larger main stiffness terms and cross-coupled damping terms, and smaller cross-coupled stiffness terms, in which the K_<XY> is smaller in magnitude, and smaller main damping terms than those of the ordinary ones with the solid surface. Furthermore, with increasing the axial length of the porous material applied to the seal surface, the main stiffness terms increase in the range of the smaller axial length than the total one of the seal surface, while the cross-coupled stiffness terms and the main damping terms decrease.
一般社団法人日本機械学会の論文
1989-04-25