2023 Fiscal Year Final Research Report
Study of interactions between micro-dimples under fluid lubrication and its application for design of ultra-high performance fluid bearings
| Project/Area Number |
21K03842
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 18040:Machine elements and tribology-related
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| Research Institution | Kanto Gakuin University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
富岡 淳 早稲田大学, 理工学術院, 教授 (40217526)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | すべり軸受 / 流体潤滑 / ディンプル / キャビテーション |
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| Outline of Final Research Achievements |
In this study, we focused on the interaction between dimples on lubricant flow around dimples and hydrodynamic fluid lubrication characteristics, and investigated various possibilities to realize a fluid dynamic bearing with low friction, high load capacity, and high rigidity. In particular, we found that even on a textured surface with equally spaced dimples, cavitation bubbles are generated differently on each dimple, and this causes a significant change in the static characteristics. These findings mean that it is necessary to construct a theory that takes into account the variation and interaction of fluid lubrication characteristics at individual dimples and apply it to fluid dynamic bearing design, rather than simply presenting an ideal model with high oil film force and low friction conditions as only one example.
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| Free Research Field |
流体潤滑
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| Academic Significance and Societal Importance of the Research Achievements |
ディンプルや溝などをしゅう動面に施した，軸受やシールなどの機械要素は，それらのテクスチャの効果によって性能向上が期待されている．しかし，理論的背景が十分ではなく，個々の条件に応じた設計方法を明らかにすることは容易ではない．そのため，個々のディンプルにおける流体潤滑特性のばらつきや相互作用を考慮した理論を構築することが重要である．このことは，単に理想的な条件のみでなく，より現実的な条件を想定した実験と解析により得られた知見を流体軸受設計に応用することを意味し，産業応用を一層拡大することができる．
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