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

基于相图的润滑油高压流变预测

• 批准号: 16560122
• 负责人: OHNO Nobuyoshi
• 金额: $ 2.3万
• 依托单位: Saga University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16560122/
• 关键词: tribology; lubricating oil; density; viscosity; phase diagram; free volume; EHL; DAC; 表面損傷防止

1.Application of Acoustic Emission for High-Pressure short Time Solidification of Traction FluidsThe 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 ContactsThe 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 ContactsThe 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

1.声发射在牵引液高压短时凝固中的应用润滑油在准静态高压下凝固，形成无定形或玻璃状固体，这已被大量研究所证实。然而，润滑油在滚动轴承和牵引无级变速器的动态条件下的凝固还不清楚。通过冲击试验后的压痕分析和冲击载荷下的声发射分析，验证了牵引液的高压短时固化。通过声发射（AE）传感器测量每次碰撞的强度。根据试验油的相图，研究了无因次声发射均方根值。润滑油的体积模量是影响高压弹流接触摩擦行为的主要因素 ...更多信息 通过高压密度测量和其他方法来提高。使用相图评估润滑油的体积模量。体积模量与油分子堆积参数T_<VE>-T（其中T_<VE>是压力p下的粘弹性固体转变温度，T是油温）密切相关。接着，通过球盘式机器测量弹性流体动力润滑牵引力。结果表明，最大牵引系数与T-T密切相关<VE>. 3.凝固油膜在滑动密集钢接触中的抗磨作用通过高压密度测量，获得了22种润滑油的相图。采用四球摩擦磨损试验机评价了边界润滑条件下润滑油的抗磨性能。结果表明，流体在钢的滑动集中接触中的抗磨作用与油的分子堆积参数T_ -T密切相关<VE>，除弹流润滑作用外，凝固油对边界润滑的实际抗磨性能起主导作用。4.金刚石对顶砧（DAC）测量2.20GPa压力下润滑油的密度采用DAC作为压力发生装置，实现了油滴密度的测量。通过测量奥氏体不锈钢垫圈厚度（厚度0.5 mm）和腔室内径（内径0.5 mm，高度0.5 mm）的体积变化来计算密度。在2.20GPa压力范围内，研究了牵引油、航天润滑油和矿物油的密度随压力的变化规律。每种润滑剂的密度变化呈现为曲线拟合。绘制了各润滑剂的相图。少

项目成果

High-Pressure Rheology of Traction Fluid for Troidal CVTs

Troidal CVT 牵引液的高压流变学

• 发表时间: 2005
• 期刊: International Tribology Conference KOBE 2005, Book of Synopses, ISBN 4-9900139-7-2
• 作者: N.Ohno;Md.Z.Rahman;H.Tsutsumi;N.Ohno;Nobuyoshi Ohno;Nobuyoshi Ohno;Nobuyoshi Ohno
• 通讯作者: Nobuyoshi Ohno

宇宙機器用PFPE基油とグリースの転がり軸受寿命試験による性能評価

航天设备用PFPE基础油和润滑脂滚动轴承寿命试验评价性能

• 发表时间: 2005
• 期刊: トライボロジー会議予稿集 東京 2005-11,ISSN 0919-6005
• 作者: N.Ohno;M.Hamaguchi;K.Tateishi;Yuichi Nakamura;Nobuyoshi Ohno;Nobuyoshi Ohno;Nobuyoshi Ohno;濱口正法;大野信義
• 通讯作者: 大野信義

The testing and evaluation method of traction drive oil

牵引传动油的测试与评价方法

• 发表时间: 2004
• 期刊: THE TRIBOLOGY 203
• 作者: N.Ohno;M.Hamaguchi;K.Tateishi;Yuichi Nakamura;Nobuyoshi Ohno;Nobuyoshi Ohno;Nobuyoshi Ohno;濱口正法;大野信義;徳永 渉;田中孝道;大野 信義;大野 信義;大野 信義;Nobuyoshi Ohno;N.Ohno
• 通讯作者: N.Ohno

Bearing Fatigue Life Tests in a Half-Toroidal CVT Fluid for Automobile

汽车用半环形 CVT 油的轴承疲劳寿命测试

• 发表时间: 2006
• 期刊: 15^<th> International Colloquium Tribology, Automotive and Lubrication, Esslingen, Germany, ISBN 3-924813-62-0 (CD-ROM)
• 作者: N.Ohno;Md.Z.Rahman;H.Tsutsumi;N.Ohno;Nobuyoshi Ohno
• 通讯作者: Nobuyoshi Ohno

Anti-Wear Action by Solidified Oil Film in Sliding Concentrated Steel Contacts

滑动集中钢触点中固化油膜的抗磨损作用

• 发表时间: 2005
• 期刊: The 1^<st> International Conference on Manufacturing, Machine Design and Tribology, Seoul, Korea, (CD)
• 作者: N.Ohno;Md.Z.Rahman;H.Tsutsumi;N.Ohno;Nobuyoshi Ohno;Nobuyoshi Ohno;Nobuyoshi Ohno;Nobuyoshi Ohno
• 通讯作者: Nobuyoshi Ohno