窪みおよび溝形状のテクスチャを有する平面しゅう動部の潤滑特性‐サーフェステクスチャを施した平面上を円筒がしゅう動する場合

抄録

  Surface texturing is one of the approaches for the application of sliding contact elements. It is widely used to improve load capacity and tribological performance of mechanical components. In addition, it is known that surface texturing is effective in collecting wear debris and the running-in of sliding surfaces. The lubrication characteristics on sliding surfaces may vary depending on the shape, size and pattern of surface texturing, but how much these elements can affect the characteristics have not been fully understood. In this study, authors conducted a numerical analysis of the solution of Reynolds equation using a finite element method, which can assess the effect of surface texturing on film formation by hydrodynamic lubrication. The results showed that in general, oil film pressure decreased at the entrance portion of surface texturing and increased rapidly at the exit portion. In case of several surface texturing machined, variation of oil film pressure repeats at the position of surface texturing. Since oil film pressure varied based mainly on the location of textured surfaces, it is possible to decrease the maximum pressure by changing their locations. Authors found that the lubrication characteristics were not affected very much by the shape of textured surfaces, but largely influenced by their locations. Through various approaches, the lubrication characteristics were improved by focusing an analysis on the outlet side of textured surfaces instead of conducting an analysis in the whole area as the former makes the force of friction smaller.