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Elucidation of the EHL film behavior based on the precise pressure and temperature measurement

Research Project

Project/Area Number 24560160
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Design engineering/Machine functional elements/Tribology
Research InstitutionKyushu Institute of Technology

Principal Investigator

NISHIKAWA Hiroshi  九州工業大学, 工学(系)研究科(研究院), 助教 (40208161)

Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
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)
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
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.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • 2012 Research-status Report
  • Research Products

    (9 results)

All 2015 2013

All Presentation (9 results)

  • [Presentation] Effect of Thickener Structure on Grease EHL Films2015

    • Author(s)
      Naoya Ikeda, Hiroshi Nishikawa
    • Organizer
      International Tribology Conference, Tokyo 2015 (ITC Tokyo 2015)
    • Place of Presentation
      Tokyo University of Science, Katsushika Campus (Tokyo・Katsushika)
    • Year and Date
      2015-09-16 – 2015-09-20
    • Related Report
      2014 Annual Research Report
  • [Presentation] Effect of Transverse Ridge on Oil Film Temperature in EHL Contacts2015

    • Author(s)
      Hiroshi Nishikawa, Takahito Shimada
    • Organizer
      International Tribology Conference, Tokyo 2015 (ITC Tokyo 2015)
    • Place of Presentation
      Tokyo University of Science, Katsushika Campus (Tokyo・Katsushika)
    • Year and Date
      2015-09-16 – 2015-09-20
    • Related Report
      2014 Annual Research Report
  • [Presentation] グリースEHL膜に及ぼす増ちょう剤の影響2015

    • Author(s)
      池田 直哉、西川 宏志
    • Organizer
      日本トライボロジー学会 トライボロジー会議2015春 姫路
    • Place of Presentation
      姫路商工会議所(兵庫県・姫路市)
    • Year and Date
      2015-05-27 – 2015-05-29
    • Related Report
      2014 Annual Research Report
  • [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
    • Related Report
      2013 Research-status Report
  • [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
      2013 Research-status Report
  • [Presentation] 点接触EHL下における温度に及ぼす突起の影響2013

    • Author(s)
      島田 貴仁、都田 聡、西川 宏志
    • 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
      東京
    • Related Report
      2012 Research-status Report
  • [Presentation] 衝撃荷重下におけるEHL油膜に及ぼす突起の影響2013

    • Author(s)
      都田 聡、島田 貴仁、西川 宏志、兼田 楨宏
    • 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
      東京
    • Related Report
      2012 Research-status Report
  • [Presentation] Effects of Surface Ridges on EHL Films under Impact Loading2013

    • Author(s)
      Hiroshi Nishikawa, Satoshi Tsuda, Takahito Shimada, Motohiro Kaneta
    • Organizer
      Trbo-Lyon 2013 (The 40th LEEDS-LYON SYMPOSIUM ON TRIBOLOGY & the TRIBOCHEMISTRY FORUM 2013)
    • Place of Presentation
      Lyon, France
    • Related Report
      2012 Research-status Report
  • [Presentation] Effect of Surface Ridges on Oil Film Temperature in EHL Contacts2013

    • Author(s)
      Hiroshi Nishikawa, Takahito Shimada, Satoshi Tsuda and Motohiro Kaneta
    • Organizer
      World Tribology Congress 2013 (WTC 2013)
    • Place of Presentation
      Torino, Italy
    • Related Report
      2012 Research-status Report

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Published: 2013-05-31   Modified: 2019-07-29  

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