動態特性油膜厚度之光學與電阻量測方法

Optical and electrical resistance measurement methods of dynamic characteristic of film thickness

謝棋凱(Chi-Kai Xie)

指導教授 ： 洪政豪

共同指導教授 ： 葉進純(Jim-ChwenYeh)

國立虎尾科技大學/工程學院/機械與機電工程研究所/碩士(2015年)

摘要

本論文設計構想利用光學多光束干涉理論量測油膜厚度，與使用多功能電位計量測電阻值，探討電阻值與油膜厚度之關係，藉由馬達進行負荷施加，藉此設計負荷施加之波形，並希望了解動態情況下電阻值與油膜厚度之關係，監測精密機械於運作時產生之油膜厚度，以利機械零件長久使用及減少摩擦產生之動力與能量之損耗。
本研究係使用光干涉理論建立一測量潤滑性質之光學量測機台，針對不同切線速度、不同滑塊傾角、不同負載、探討不同實驗參數對油膜厚度的影響，並用液動潤滑理論驗證其可行性，在經實驗後，得到轉速越快油膜厚度會越大，負荷越大油膜厚度會越小，使用電阻計量測則為油膜厚度越高，電阻值越大，探討後得到兩者關係之回歸曲線，並經由回歸曲線得到兩者之關係式，所以影響電阻值最大因素為油膜厚度，油膜厚度越高則電阻值隨之升高。
利用動態負載機構模擬油膜厚度於機台運轉時之嚴苛環境油膜厚度，實驗驗證與雷諾方程式相符，轉速越快油膜後度越大，負荷越重油膜厚度越小，在多次施加負荷後油膜厚度有上升的趨勢，而轉速越快上升的幅度越大，比較上升值後發現頻率越高則油膜厚度變化值收斂的越快，頻率慢則油膜厚度變化值上升較少，而消除負荷及施加負荷之動態油膜每秒變化率為施加負荷後之油膜厚度每秒變化率較高。

關鍵字

面接觸 ； 液動潤滑 ； 傾角 ； 切線速度 ； 多光束干涉 ； 油膜厚度

並列摘要

This paper, use the optical multi-beam interference theory to measure oil film thickness, and use the multi-functional potential measured resistance value, explore the relationship between the resistance value of the oil film thickness, carried out by the motor load is applied, whereby the waveform applied to the load, and would like to know the relationship between the dynamic oil film thickness and resistance value , film thickness monitoring precision machinery arising at the time of the operation, in order to facilitate long-term use of mechanical parts and reduce the loss of power and energy generated from the friction.
　　In this study, use the optical interference theory establish a machine to measure the lubricating properties, It sets different slider angles, tangential velocities, load, dynamic load topography parameters to discuss influence of different experimental, and utilizes hydrodynamic lubrication theory to verify its feasibility, after the experiment, in the faster speed the oil film thickness will be larger, the opposite of between the load and oil film thikness, using a resistance measurement of film thickness measurement was higher, the greater the resistance value obtained after explore the relationship between the two regression curve, and get through the regression curve of the relationship between the two, so the impact resistance of the biggest factors for the film thickness, film thickness, the higher the resistance value will be increased.
　　Utilizes dynamic load simulation mechanism consistent film thickness in harsh environments film thickness machine during operation, the experimental verification and Formula Renault, the greater the speed, the faster the film after the degree, load the heavier smaller film thickness, after repeatedly applied load film thickness upward trend, while the greater the speed, the faster rise in amplitude comparison found that the higher the frequency of the appreciation after the film thickness variation converge faster, then slower frequency increased film thickness variation value is less, and the elimination of load and Dynamic load is applied to the film per second rate of change of the high rate of change of the film thickness after the second load is applied.

並列關鍵字

surface contact ； hydrodynamic lubrication ； dip angle ； tangential velocity ； optical multi-beam interference ； oil film thickness

參考文獻

[1] 方治國，2013，”從滑液關節到仿生磨潤工程技術”，國立宜蘭大學工程學刊，第9期，pp.1-25。

[4] D.F.Moore, 1975, Principles and Application of Tribology, Pergamon International Library, London.

[8] M. T. Kirk, 1962, “Hydrodynamic Lubrication of Perspex”, Nature, Vol.194, No.4832.

[9] A. Cameron, and R. Gohar,1966, “Theoretical and Experimental of Studies of the Oil Film in the Lubricated Point Contact”, Proc. R. Soc. Lond. A, Vol. 291,pp.520-536.

[10] M. Kaneta, and H. Nishikawa, 1999, “Experimental Study on Micro Elastohydrodynamic Lubrication, Journal of Engineering tribology”, Vol.213, pp. 371-381.