應用田口法於磁流體動壓軸承設計最佳化研究

流體軸承在機械結構中被廣泛的使用，但現今流體軸承皆無法避免流體軸承於運轉時的不穩定狀態（如油漩與油顫）發生，流體軸承於不穩定狀態下運轉可能會造成軸承內部發生碰撞摩擦，使軸承組件損壞。為了改善的軸承不穩定，本研究盡可能列出影響臨界轉速的參數，並從中選出控制因子進行田口法分析。本研究以磁流體動壓軸承轉子測試平台為實驗系統，透過改變磁流體的體積分率、顆粒大小與磁場強度、配置，配合L8直交表進行實驗。由實驗數據可組成因子反應表進行初步分析，再透過初步數據進行變異分析與F測試，進而獲得更精確的因子貢獻度及實驗配置。透過數據顯示為實驗最佳化配置，並利用此配置進行數學預測與確認實驗。數學預測的最佳臨界轉速為2775 rpm，而確認實驗的臨界轉速為2767 rpm，此實驗差為8 rpm。

關鍵字

流體動壓軸承；鐵磁流體；油漩；田口法

並列摘要

The fluid bearing has been widely used in the mechanical construction. However, it has been found that fluid bearings may become unstable while in operation (e.g., Whirl and Whip), which may cause damage to bearing assemblies via collision and friction. In order to improve the bearing instability, this study lists the parameters that affect the critical speed as much as possible, and select the control factor from Taguchi analysis. In this study, use Ferrofluid Hydrodynamic Journal Bearing for the experimental system, by changing the Ferrofluid volume fraction, particle size and magnetic field strength, configuration, with L8 orthogonal array to experiment. Through the experimental data build factor response table to make a preliminary analysis, and then through ANOVA and F-Test analysis the preliminary data, and then obtain the more accurate factor contribution and the experiment configuration. Through the Taguchi Method experiment data display for the experimental optimization configuration, and use this configuration for mathematical prediction and validation experiments. The optimal critical speed for mathematical prediction is 2775 rpm, and the critical speed of the experiment is 2767 rpm, and the difference between the both experiments is 8rpm.

並列關鍵字

Hydrodynamic Journal Bearings ； Ferrofluid ； Fluid whirl ； Taguchi method.

參考文獻

[1] O. Reynolds, "On the Theory of Lubrication and Its Application to Mr. Beauchamp Tower's Experiments, Including an Experimental Determination of the Viscosity of Olive Oil," Proceedings of the Royal Society of London, vol. 40, no. 242-245, pp. 191-203, 1886.

[2] S. Naïmi, M. Chouchane, and J.-L. Ligier, "Steady state analysis of a hydrodynamic short bearing supplied with a circumferential groove," Comptes Rendus Mecanique, vol. 338, no. 6, pp. 338-349, 2010.

[3] S. Kasolang, M. A. Ahmad, R.-D. Joyce, and C. F. M. Tai, "Preliminary study of pressure profile in hydrodynamic lubrication journal bearing," Procedia Engineering, vol. 41, pp. 1743-1749, 2012.

[4] S. Kamaya and Y. Miyake, "Static characteristics of the regular and reversible rotation type herringbone grooved journal bearing," Journal of tribology, vol. 111, p. 485, 1989.

[5] U. Singh, L. Roy, and M. Sahu, "Steady-state thermo-hydrodynamic analysis of cylindrical fluid film journal bearing with an axial groove," Tribology International, vol. 41, no. 12, pp. 1135-1144, 2008.

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應用田口法於磁流體動壓軸承設計最佳化研究

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