2023 Fiscal Year Final Research Report
Creation of New Gas Bearing Structure Utilizing Self-organizing Algorithm
| Project/Area Number |
20K04244
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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 | Tokai University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2024-03-31
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| Keywords | トライボロジー / 流体軸受 / フォイル気体軸受 / トポロジー最適化 / バンプフォイル軸受 / メッシュフォイル軸受 / 負荷容量 / 振動特性 |
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| Outline of Final Research Achievements |
This aim of this research is applying a new optimization method to foil gas bearings, which have extremely low friction, and finding a new bearing structure. By applying a topological optimization method to the bearing, it was found that the trailing edge structure of the bearing is effective for high load capacity. This was experimentally verified using the thrust bearing test rig, and three-dimensional transmission images were also obtained using X-ray CT to visualize the deformation condition. It is confirmed that the bearing clearance shape of the wedge film can be maintained even under high loads. Meanwhile, a journal bearing test rig was also designed and manufactured, and the effectiveness of the newly proposed bump mesh foil bearing was experimentally verified.
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| Free Research Field |
トライボロジー
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では、環境に極めて優しい気体軸受の中でも発展が期待されるフォイル軸受に着目し，同軸受の設計課題の一つであるバンプフォイル構造の最適化を試みた．その結果，従来の設計とは異なり，バンプフォイルの後縁部を支持することが有効であるとの結論を得た．またこれを受けて軸受を製作し，実験的検証を行い，得られた設計指針の有効性が確かめられた．また，X線CT装置による回転時の軸受透過試験を実施し，そのメカニズムの解明も試みた．さらに，ジャーナル軸受試験装置も本研究課題の中で設計・製作した．静・動特性の試験に成功し，新たに提案したバンプメッシュフォイル軸受の有効性が検証された．
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