Instability af the Oil Film of Thrust Bearings

推力轴承油膜的不稳定

• 批准号: 12650136
• 负责人: HARADA Masami
• 金额: $ 0.45万
• 依托单位: Saitama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650136/
• 关键词: hydro-dynamic lubrication; lubrication; transition; turbulence; instability of oil film; oil film bearing; thrust bearing; transition from laminar to turbulence; hydro-dynamic lubrication; oil film bearing; thrust bearing; instability of oil fi

Experimental investigations of instability in the fluid film of thrust bearings are presented. Flow between a stational and a rotational disk of 80 mm diameter are used as a model of fluid film of thrust bearings. The gap between two disks is 0.5 mm. Water is used as a working fluid. In order to visualize the flow, two types of fine particles are used. One is the powder of barium sulfate of 2〜5μm diameter and the other is Monodisperse Fluorescent Polymer Microspheres of 0.9 μm diameter. In case of using barium sulfate powder for visualization, under appropriate lighting, the flows are observed and taken a photo. Then, to avoid the diffused reflections from the disk surfaces, Fluorescent Microspheres are used as additives for visualization and lightened by ultraviolet rays. As a result, we can get following conclusions :(1) Photographs show the three types of instability patterns are observed. The first one is the spiral vortex generating in high Reynold's number region and the vortex lines are nearly concentric. This phenomena is called type I instability. The second one is a series of wave like pattern generating in the middle Reynold's number region and called viscous instability or type II instability. This pattern is on the fixed disk and exists in the half region of the gap. The third one is cross pattern(2) We can avoid the diffused reflections from the disks by using the Monodisperse Fluorescent Polymer Microspheres and get clear photographs of the cross sections of the gap

本文介绍了推力轴承油膜不稳定性的实验研究。本文以一个直径为80 mm的旋转圆盘和一个转子之间的流动为推力轴承的液膜模型。两个盘之间的差距为0.5 mm。水用作工作流体。为了使流动可视化，使用了两种类型的细颗粒。一种是直径为2 ~ 5μm的硫酸钡粉末，另一种是直径为0.9 μm的单分散荧光聚合物微球。在使用硫酸钡粉末进行可视化的情况下，在适当的照明下，观察流动并拍照。然后，为了避免从磁盘表面漫反射，荧光微球被用作可视化的添加剂，并通过紫外线照亮。结果表明：（1）照片显示了三种不同的失稳模式。第一种是在高雷诺数区产生螺旋涡，涡线近似同心;这种现象称为I型不稳定性。第二种是在中尺度区域内产生的一系列波动，称为粘性不稳定性或II型不稳定性。该图案在固定盘上并且存在于差距的半区域中。（2）利用单分散荧光聚合物微球可以避免圆盘的漫反射，得到清晰的差距截面照片

项目成果

原田 正躬, 塚崎 重多郎: "スラストすべり軸受の油膜の不安定について(油膜断面の観察)"日本機械学会年次大会. (講演予定). (2002)

原田正美、冢崎十太郎：“关于推力滑动轴承油膜的不稳定性（油膜横截面的观察）”日本机械工程学会年会（预定演讲）。

M.HARADA, J.TSUKAZAKI, H.YAMAMOTO, Y.SATO: "An Experimental Investigation of Oil Flow in Hydro-Seal and Maximum Sealed Pressure"Proc. 2^<nd> World Tribology Congress. Sept.3-7. (2001)

M.HARADA，J.TSUKAZAKI，H.YAMAMOTO，Y.SATO：“液压密封中油流和最大密封压力的实验研究”Proc。

M.Harada,J.Tsukazaki & H.Yamamoto: "An Experimental Investigation of Oil Flow in Hydro-Seal and Maximum Sealed Pressure"Proceedings of the 2^<nd> World Tribology Gongress. 3-7 Sept.. (2001)

原田先生、冢崎先生

M. Harada, J. Tsukazaki, H. Yamamoto: "An Experimental Investigation of Oil Film in Hydro-Seal and Maximum Sealed Pressure""Proc. the 2^<nd> World Tribology Congress CD-ROM, Sept.3-7.. (2001)

M. Harada、J. Tsukazaki、H. Yamamoto：“水密封和最大密封压力中油膜的实验研究”“Proc. 第二届世界摩擦学大会 CD-ROM，9 月 3-7 日。

原田正躬, 塚崎重多郎: "スラストすべり軸受の油膜の不安定について(油膜断面の観察)"日本機械学会年次大会. (講演予定). (2002)

原田正通、冢崎寿太郎：“关于推力滑动轴承油膜的不稳定性（油膜横截面的观察）”日本机械工程学会年会（预定演讲）。