摘 要


彈液動潤滑通常是以衝擊負荷為條件。在這樣的例子裡，擠壓效應扮演了一個重要的角色。本研究採用自行開發的彈液動潤滑試驗機，探討在不同的擠壓速度、負荷和潤滑油黏度對兩元件互相接觸所產生內凹(dimple)之影響。而彈液動接觸區是採用白光、光學顯微鏡和CCD紀錄設備，以光學干涉的方法來加以觀察研究。

結果顯示：隨著擠壓速度的增加，內凹會變的更厚。此外，在相同的實驗條件下，提高潤滑油的黏度會使得最大內凹厚度變的更厚。當擠壓負荷較大時，內凹油膜會維持較長的時間。

Abstract


Elastohydrodynamically lubricated conjunctions are often subjected to impact loading. In such case the squeeze effect plays an important role. This research uses a self-development EHL tester to explore the effects of squeeze velocity, load and viscosity of lubricant on the dimple film thickness occurs between two components approach each other. The contact region is studied by means of optical interferometry using white light, a microscope and a CCD camera recording equipment.

The results of the test show that increasing squeeze velocity makes the dimple deeper. Furthermore, the maximum central dimple film thickness becomes greater as the viscosity of lubricant increases at the same experiment condition. When the squeeze load is larger, it will keep the dimple film longer.

總 目 錄
頁次
中文摘要 I
英文摘要 ii
總目錄 iii
圖目錄 vi
表目錄 xi
符號說明 xii
第一章 緒論 1
1-1 前言 1
1-2 文獻回顧 1
1-3 油膜厚度之量測方法 3
1-3-1 電阻法 3
1-3-2 放電電壓法 4
1-3-3 電容法 4
1-3-4 位移法 5
1-3-5 X射線透射法 5
1-3-6 光干涉法 6
1-4 光干涉法試驗機之發展 6
1-5 研究目的及本文重點 8
1-6 論文架構 8
第二章 實驗設備與實驗方法 16
2-1 實驗設備 16
2-1-1 負荷及潤滑系統 16
2-1-2 擠壓速度控制系統 21
2-1-3 光學顯微觀測系統 27
2-2 重力加速與等速機構的比較 29
2-3 實驗條件 32
2-3-1 潤滑油性質與試片尺寸 32
2-3-2 實驗條件 33
2-4 實驗步驟 34
2-5 光學干涉原理 35
2-5-1 薄膜產生的干涉 35
2-5-2 光的可見度 38
2-5-3 析光膜 40
2-5-4 干涉顏色與厚度的校對 41
2-5-5 間隔層 47
第三章 實驗結果與討論 48
3-1 Hertz接觸直徑與Hertz壓力 48
3-1-1 Hertz接觸直徑 48
3-1-2 Hertz壓力 49
3-2 間隔層校正實驗 53
3-3 純擠壓狀態下之彈液動潤滑油膜厚度 57
3-3-1 負荷對油膜厚度的影響 57
3-3-2 擠壓速度對油膜厚度的影響 72
3-3-3 潤滑油黏度對油膜厚度的影響 72
3-3-4 擠壓後之油膜隨著時間的變化 80
第四章 結論與未來展望 89
4-1 結論 89
4-2 未來展望 90
參考文獻 91

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