Elucidation of the EHL film behavior based on the precise pressure and temperature measurement
| Project/Area Number |
24560160
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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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| Research Field |
Design engineering/Machine functional elements/Tribology
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| Research Institution | Kyushu Institute of Technology |
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Principal Investigator |
NISHIKAWA Hiroshi 九州工業大学, 工学(系)研究科(研究院), 助教 (40208161)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2012: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | トライボロジー / 弾性流体潤滑（EHL） / 油膜厚さ / 温度 / 圧力 / グリース / 弾性流体潤滑(EHL) / 国際情報交換 / チェコ / 弾性流体潤滑 / 機械要素 / 機械要 |
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| Outline of Final Research Achievements |
The temperature and thickness of oil film in point EHL contacts between a rough stationary steel ball surface and a smooth moving sapphire disc surface are measured with infrared and optical interferometry techniques. When the single ridge is aligned perpendicular to entrainment direction, the maximum temperature rise occurs at the ridge in the case of ridge at the exit of contact. There is almost no difference in the maximum oil film temperature rise between the longitudinal and transverse multiple ridges.
The central film thickness of entrapped oil is depending on the loading speed but independent of the final load value. When impact is applied to the surface with long ridges, the horse-shoe shaped constriction is formed at each bump near the contact rim, and the micro-groove is produced in the ridges.
The average film thickness for grease is larger than that for the base oil. It seems that thickener size has effect on the average central film thickness at low speed.
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Report
(4 results)
Research Products
(9 results)
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[Presentation] 電食による損傷の進展挙動2013
Author(s)
古谷 優、西川 宏志、松田 健次、砂原 賢治、山本 正治
Organizer
日本トライボロジー学会 トライボロジー会議2013春 東京
Place of Presentation
国立オリンピック記念青少年総合センター 東京都渋谷区代々木神園町3番1号
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[Presentation] 耐電食グリースを用いた実機モータの耐久試験2013
Author(s)
砂原 賢治、落合 悠基、小川 哲生、山本 正治、藤波 行敏、赤木 恭馬、西川 宏志、松田 健次
Organizer
日本トライボロジー学会 トライボロジー会議2013春 東京
Place of Presentation
国立オリンピック記念青少年総合センター 東京都渋谷区代々木神園町3番1号
Related Report
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