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2005 Fiscal Year Final Research Report Summary

Prediction of High-Pressure Pheology of Lubricating Oils Based on Phase Diagram

Research Project

Project/Area Number 16560122
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Design engineering/Machine functional elements/Tribology
Research InstitutionSaga University

Principal Investigator

OHNO Nobuyoshi  Saga University, Faculty of Science and Engineering, Department of Mechanical Engineering, Professor, 理工学部, 教授 (00039265)

Project Period (FY) 2004 – 2005
Keywordstribology / lubricating oil / density / viscosity / phase diagram / free volume / EHL / DAC
Research Abstract

1.Application of Acoustic Emission for High-Pressure short Time Solidification of Traction Fluids
The lubricating oils solidify at quasi-static high-pressure as the amorphous or glassy solids are verified by a number of studies. However, solidification of lubricating oil under the dynamic condition as the rolling bearings and the traction CVT is not clear. The high-pressure short time solidification of traction fluids is examined by the analysis of dent after the impact tests and AE analysis under impact loads. The intensity of each impact collision is measured by means of an acoustic emission (AE) sensor. The dimensionless AE r.m.s value is investigated by based on phase diagram of testing oils. It was recognized the solidification of oil under the dynamic high-pressure condition almost corresponded to the static condition.
2.Bulk Modulus of Lubricating Oils as Predominant Factor Affecting Tractional Behavior in High-Pressure Elastohydrodynamic Contacts
The phase diagrams were first made … More up by high-pressure density measurements and others. The bulk modulus of lubricating oils was evaluated using a phase diagram. The bulk modulus is closely related to the oil molecular packing parameter T_<VE>-T (where T_<VE> is the viscoelastic solid transition temperature at pressure p, and T is the oil temperature). Next, the elastohydrodynamic lubrication traction was measured by a ball-on-disk machine. The results indicated that the maximum traction coefficient is closely related to T_<VE>-T. As a result, the importance of the bulk modulus as a predominant factor for traction characteristics lubricating oil was pointed out.
3.Anti-Wear Action by Solidified Oil Film in Sliding Concentrated Steel Contacts
The phase diagram of twenty-two kinds of oil was obtained through high-pressure density measurement. The four-ball were teats were used to evaluate the anti-wear characteristics of oils in boundary lubrication condition. The results indicated that the anti-wear action by fluid in sliding concentrated steel contacts is closely related to the oil molecular packing parameter T_<VE>-T and besides the effect of EHL the solidification oils rather has a predominating influence on actual anti-wear performances of boundary lubrication. It is confirmed that the solidified oil film under the boundary lubrication has the anti-wear action.
4.Measurement of the density of lubricating oils at pressures to 2.20 GPa using diamond anvil cell (DAC)
Using a DAC as pressure-generating device, the measurement of of density of drop of oil became possible. The density is calculated by measuring the volume change from the thickness of austenitic stainless steel gasket (thickness 0.5mm) and inner diameter of chamber (inner diameter 0.5mm, height 0.5mm). The density variation with the pressure of traction oil, lubricant for space applications and mineral oil is investigated for pressures up to 2.20GPa. The density variation for each lubricant is presented as a curve fit. The phase diagram of each lubricant is made. Less

  • Research Products

    (25 results)

All 2006 2005 2004

All Journal Article (24 results) Book (1 results)

  • [Journal Article] High-Pressure Short Time Behavior of Traction Fluids2006

    • Author(s)
      Nobuyoshi Ohno
    • Journal Title

      Lubrication Science 18・1

      Pages: 25-36

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Bearing Fatigue Life Tests in Haif-Toroidal CVT Fluids for Automobile2006

    • Author(s)
      Nobuyoshi Ohno
    • Journal Title

      15^<th> International Colloquium Tribology, Automotive and Industrial Lubrication, Esslingen, Germany, ISBN 3-924813-62-O, (CD)

      Pages: 1-5

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] High-pressure behavior of toroidal CVT fluid for automobile2006

    • Author(s)
      Nobuyoshi Ohno
    • Journal Title

      Tribology International (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Bearing Fatigue Life Tests in Half-Toroidal CVT Fluids for Automobile2006

    • Author(s)
      N.Ohno, S.Morita, M.Hamaguchi, K.Tateishi
    • Journal Title

      15^<th> International Colloquium Tribology, Automotive and Industrial Lubrication, Esslingen, Germany ISBN3-924813-62-O(CD)

      Pages: 1-5

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] High-Pressure Short Time Behavior of Traction Fluids2006

    • Author(s)
      N.Ohno, Md.Z.Rahman, H.Tsutsumi
    • Journal Title

      Lubrication Science 18, 1

      Pages: 25-36

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] High-pressure behavior of toroidal CVT fluid for automobile2006

    • Author(s)
      N.Ohno
    • Journal Title

      Tribology International (in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Bulk Modulus of Lubricating Oils as Predominant Factor Affecting Tractional Behavior at High Pressure Elastohydrodynamic Contacts2005

    • Author(s)
      Nobuyoshi Ohno
    • Journal Title

      STLE Tribology Transactions 48・2

      Pages: 165-170

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] High-Pressure Rheology of Traction Fluid for Troidal CVTs2005

    • Author(s)
      Nobuyoshi Ohno
    • Journal Title

      International Tribology Conference KOBE 2005, Book of Synopses, ISBN 4-9900139-7-2

      Pages: 172

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Anti-Wear Action by Solidified Oil Film in Sliding Concentrated Steel Contacts2005

    • Author(s)
      Nobuyoshi Ohno
    • Journal Title

      The 1^<st> International Conference on Manufacturing, Machine Design and Tribology, Seoul, Korea, (CD)

      Pages: 1-4

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Application of Acoustic Emission for High-Pressure Short Time Solidification of Traction Fluids2005

    • Author(s)
      Nobuyoshi Ohno
    • Journal Title

      Proc. of World Tribology Congress III, Washington DC, USA, ISBN O-7918-3667-X, (CD)

      Pages: 1-2

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] ハーフトロイダルCVT用トラクション油の高圧物性2005

    • Author(s)
      大野信義
    • Journal Title

      高圧力の科学と技術 15・特別号

      Pages: 51

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Bulk Modulus of Lubricating Oils as Predominant Factor Affecting Tractional Behavior in High-Pressure Elastohydrodynamic Contacts2005

    • Author(s)
      N.Ohno, Md.Z.Rahman, K.Kakuda
    • Journal Title

      STLE Tribology Transactions 48, 2

      Pages: 165-170

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] High-Pressure Rheology of Traction Fluid for Troidal CVTs2005

    • Author(s)
      N.Ohno, S.Yamada
    • Journal Title

      International Tribology Conference, KOBE 2005, Book of Synopses ISBN4-9900139-7-2

      Pages: 172

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Anti-wear Action by Solidified Oil Film in Sliding Concentrated Steel Contacts2005

    • Author(s)
      N.Ohno, T.Tanaka, H.Komiya
    • Journal Title

      The 1^<st> International Conference on Manufacturing, Machine Design and Tribology, Seoul Korea (CD)

      Pages: 1-4

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Application of Acoustic Emission for High-Pressure Short Time Solidification of Traction Fluids2005

    • Author(s)
      N.Ohno, W.Tokunaga
    • Journal Title

      Proc.of World Tribology Cogress III, Washington DC, USA ISBN0-7918-3667-X(CD)

      Pages: 1-2

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] High-pressure rheology of half-toroidal CVT traction oil for automobile2005

    • Author(s)
      N.Ohno, M.Hamaguchi, K.Tateishi
    • Journal Title

      Special Issue of The Review of High Pressure Science and Technology 14

      Pages: 51

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] トラクションドライブ油の試験・評価方法2004

    • Author(s)
      大野 信義
    • Journal Title

      月刊トライボロジー 18・7

      Pages: 28-30

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 粘度の温度変化2004

    • Author(s)
      大野 信義
    • Journal Title

      トライボロジスト 49・8

      Pages: 658-659

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 粘度の圧力変化2004

    • Author(s)
      大野 信義
    • Journal Title

      トライボロジスト 49・9

      Pages: 720-721

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Effect of Perfluoropolyether Fluids on Life of Thrust Ball Bearings2004

    • Author(s)
      Nobuyoshi Ohno
    • Journal Title

      Proc. of 2004 ASME/STLE International Joint Tribology Conference, Long Beach, USA ISBN 0-7918-37511-3, TRIB2004(CD)

      Pages: 1-7

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] The testing and evaluation method of traction drive oil2004

    • Author(s)
      N.Ohno
    • Journal Title

      THE TRIBOLOGY 203

      Pages: 28-30

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Variation of Viscosity with Temperature2004

    • Author(s)
      N.Ohno
    • Journal Title

      Journal of Japanese Society of Tribologists 49, 8

      Pages: 658-659

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Variation of Viscosity with Pressure2004

    • Author(s)
      N.Ohno
    • Journal Title

      Journal of Japanese Society of Tribologists 49, 9

      Pages: 720-721

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Effect of perfluoro-Polyether Fluids on Life of Thrust Ball Bearings2004

    • Author(s)
      N.Ohno, Md.Z.Rahman, S.Yamada, H.Komiya
    • Journal Title

      Proc.of 2004 ASME/STLE International Joint Tribology Conference, Long Beach, USA ISBN 0-7918-37511-3 TRIB2004-64018(CD)

      Pages: 1-7

    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] 石油製品添加剤の開発(普及版)ISBN4-88231-837-7 第9章 流動点降下剤119-1322004

    • Author(s)
      岡部平八郎, 大勝靖一(監修)
    • Total Pages
      174
    • Publisher
      シーエムシー社
    • Description
      「研究成果報告書概要(和文)」より

URL: 

Published: 2007-12-13  

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