小型液態軸承之動態特性量測實驗系統的設計與建構

Experimental Validation on the Dynamic Characteristics of a Small-scaled Hydrodynamic Bearing Used for Data-storage Devices

陳俊名(Chun-Ming Chen)

指導教授 ： 黃健生

中原大學/工學院/機械工程研究所/碩士(2004年)

https://doi.org/10.6840/cycu200400707

摘要

本研究目的在於設計並建構一軸承實驗系統，並由此系統的實驗操作來量測小尺寸液態軸承的動態係數。由於液態軸承目前已廣泛應用於資料儲存伺服機構、光碟片伺服機構、硬碟機構，因此在現今的工業中軸承的動態分析仍十分重要。探討研究設計，本研究首要的創新構想為使用具有高度剛性的空氣軸承與可使待測軸承如懸浮般的懸吊固定架構，其中實驗系統並包括了數種特別尺寸與精度需求而製造的幾何形狀的組件。考慮到實驗中軸心與軸承的相對位移量測，因此特別使用到四組電容式位移計針對軸與軸承於X、Y方向進行位移的量測，並在最後力平衡方程式的演算可估測液態軸承的剛性、負載與偏心比關係。

關鍵字

空氣軸承 ； 液態軸承 ； 剛性係數 ； 負載

並列摘要

The objective of the study is to design and construct an experimental system that would be used to evaluate the dynamic performance of the small-scaled Hydrodynamic bearings often used for data-storage devices. To this end, novel design ideas of the usage of a high-stiffness air bearing and suspending the test bearing by the specially-designed fixture frame are first proposed, which are accompanied by the special requirements in the manufacturing precisions for various dimensions and geometry characteristics of the components of the experiment system. The capacitor-type sensors, including two custom-made are next utilized to measure the motions of the spindle and bearing. Finally, a calculating algorithm for deriving performance parameters of the test bearing are proposed, which is intended primarily to estimate rotor stiffness coefficients, load capacity, and eccentricity ratio to determine if the test bearing meet expected dynamic performance expected by the original design.

並列關鍵字

load capacity ； stiffness coefficients ； air bearing ； Hydrodynamic bearing

參考文獻

[2] Q.D. Zhang, S.X. Chen, and Z.J. Liu., 1999, “Design of a hybrid fluid bearing system for HDD spindles,” IEEE Trans. Magn, vol. 35, no. 2, pp. 2638-2640.

[6] Nordmann, R., and Schollhorn, K., 1980, “Identification of Stiffness and Damping Coefficients of Journal Bearings by Means of the Impact Method,” IMechE Second International Conference, Vibrationa in Rotating Machinery, Paper C285/80, pp.231-258.

[8] Dara, C., and Keith, H., 1994, “A Test Apparatus and Facility to Identify the Rotordynamic Coefficients of High-Speed Hydrostatic Bearings,” Journal of Tribology, Vol. 116, pp.337-344.

[12] Yasuda, C. Kanki, H. Ozawa, Y., and Kawakami, T., 1986, “Application of Random Excitation Technique to Dynamic Characteristics Measurement of Bearing,” The International Conference on Rotordynamics, Tokyo, pp.61-67.

[1] K.A. Liebler., 1995, “Future trends in spindle bearings for disk drives,” Data Storage, pp.37-40, Nov./Dec.