Theoretical and Experimental Study on Elastohydrodynamic Lubircation by Bingham-Visco-Elastic Fluids for Greases

宾汉粘弹性流体润滑脂弹流润滑的理论与实验研究

• 批准号: 05650150
• 负责人: HAYASHI Hirotsugu
• 金额: $ 1.34万
• 依托单位: Waseda University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05650150/
• 关键词: Grease; Bingham Fluids; Viscoelastic Fluids; Rheology; Lubrication Theory; Tribology; トライボロジー

The object of this project is to establish an elastohydrodynamic lubrication theory for greases, because a grease is used in practice due to easy lubrication system as compared with that by other lubricants such as oil.A rheology equation supposed in this project, which consists of one slider and two nonlinear dashpots and two non-linear springs, is investigated experimentally for the grease.Lubrication equations are derived for line contact problems in such as roller bearings employing the rheology equation mentioned above. On the other hand, for point contact problems in such as ball bearings, the rheology equation is extended in tensor form and the partial differential equation of lubrication equation is obtained. These lubrication equations are different types whether the stress of grease in lubricating film is greater than yield stress or not, i.e. core occurs or not.By an application of the lubrication equations to the bearings and experiment for rotating cylinder with lubricating greases, it is clarified that the core formations may be rare case in point contact problems as comared with line contact problems.

本项目的目的是建立一种润滑脂的弹性流体动力润滑理论，因为与其他润滑剂(如油)相比，润滑脂在实际应用中更容易使用。本项目假设的润滑脂的流变方程由一个滑块、两个非线性缓冲器和两个非线性弹簧组成。利用上述流变方程推导了滚子轴承等线接触问题的润滑方程。另一方面，对于球轴承等点接触问题，将流变方程推广为张量形式，得到了润滑方程的偏微分方程式。无论润滑膜中润滑脂的应力是否大于屈服应力，即是否存在油芯，这些润滑方程都是不同类型的。通过对轴承的应用和有润滑脂的旋转气缸的实验，阐明了与线接触问题相比，在点接触问题中，铁芯的形成可能是罕见的。

项目成果

林洋次: "グリースを用いたスクイーズ軸受の性能実験" 日本設計工学会講演論文集. 94. 17-20 (1994)

Yoji Hayashi：“使用润滑脂的挤压轴承的性能实验”日本设计工程学会论文集 94. 17-20 (1994)。

Hirotsugu Hayashi: "Hydrodynamic Lubrication for Bingham-Visco-Elastic Fluids (Part 1, Infinite Width Bearings)" Proceedings of Conference of Japan Society for Tribology. No.93. 719-722 (1993)

Hirotsugu Hayashi：“宾厄姆粘弹性流体的流体动力润滑（第 1 部分，无限宽度轴承）”日本摩擦学会会议记录。

林洋次他2名: "ビンガム粘弾性流体潤滑の研究(無限幅流体潤滑問題)" トライボロジー会議予稿集. 1993-11. 719-722 (1993)

Yoji Hayashi 等人 2：“Bingham 粘弹性流体润滑研究（无限宽度流体润滑问题）”摩擦学会议论文集 1993-722（1993 年）。

林洋次: "ビンガム粘弾性流体潤滑の研究(無限幅流体潤滑問題)" 日本トライボロジー学会、トライボロジー会議予稿集. 93. 719-722 (1993)

Yoji Hayashi：“Bingham 粘弹性流体润滑研究（无限宽度流体润滑问题）”日本摩擦学会摩擦学会议论文集 93. 719-722 (1993)。

林洋次: "ビンガム粘弾性流体潤滑の研究(有限幅流体潤滑問題)" 日本トライボロジー学会、トライボロジー会議予稿集. 94. 527-530 (1994)

Yoji Hayashi：“Bingham 粘弹性流体润滑研究（有限宽度流体润滑问题）”日本摩擦学会摩擦学会议论文集 94. 527-530 (1994)。