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Development of High Stiffness Hydrostatic Gas Bearing Spindle with Two Circumferential Grooves

两个圆周槽高刚度静压气体轴承主轴的研制

基本信息

批准号：
61850028
负责人：
ONO Kyosuke
金额：
$ 2.94万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research
财政年份：
1986
资助国家：
日本
起止时间：
1986 至 1987
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-61850028/
关键词：
Air Bearing Air Spindle Stiffness Q factor Modal Analysis Grooved Bearing 共振周波数 Q値静剛性動剛性

项目摘要

This paper desctibes the design and measured data of the newly developed grooved air berings spindle which is composed of two thrust beatings of 100-110 mm outer diameter and one radial bearing of 50 mm length and 50 mm diameter. In the first development, every efforts were devoted to increasing the bearing stiffness and the results were successful. However, the bearing damping was found to be reduced on the contrarty. Then, in the second development, the optimal balanced design was performed to increase the damping by decreasing the stiffness slightly. The works and results done in this project are summatized as follows:(1) The numerical analysis method developed here can predict quantitatively the the stiffness and damping or air film.(2) The new design method was developed to optimize the statical air bearing stiffness in the radial, angular and thrust directions and Q factors at resonances of the spindle.(3) The experimental modal analysis method was developed for identifying the modal parameters, vibration modes and synamic stiffness at resonance.(4) The air spindle developed here has 110N/<micrn>m radial stiffness, 500 N/<micrn>m thrust stiffness and 3.5*10^5 Nm/rad angular stiffness under 0.49 MPa. The air consumption is less than 10 Nl/min.(5) The developed spindle has Q factors of 15, 16 and 10 at the radial, thrust and angular mode resonances, respectively.This project was successful because the performances desctibed above are comparable to or better than that of the best available air spindle of this kind.

本文介绍了由两个外径为100-110 mm的止推轴承和一个长50 mm、直径50 mm的径向轴承组成的新型沟槽式空气轴承主轴的设计和实测数据。在第一次开发中，我们尽一切努力提高轴承刚度，结果取得了成功。然而，轴承阻尼被发现在相反的情况下减小。然后，在第二次开发中，进行了最优平衡设计，通过略微降低刚度来增加阻尼。本文所做的工作和取得的成果如下：（1）本文所建立的数值分析方法可以定量地预测气膜的刚度和阻尼。(2)提出了一种新的设计方法，以优化空气轴承在径向、角向和推力方向上的静态刚度以及主轴共振时的Q因子。(3)提出了一种试验模态分析方法，用于识别结构的模态参数、振型和共振时的刚度。(4)本文开发的空气主轴在0.49 MPa下具有110 N/<micrn>m的径向刚度、500 N/<micrn>m的推力刚度和3.5*10^5 Nm/rad的角刚度。空气消耗量小于10 Nl/min。(5)所研制的主轴在径向、推力和角向模态谐振时的Q值分别为15、16和10，其性能达到或优于同类最好的空气主轴。