本文關(guān)鍵詞： 潤滑油膜測量 雙色光干涉 顏色復(fù)現(xiàn) 色度學(xué)模型 RG結(jié)合法　出處：《青島理工大學(xué)》2011年碩士論文　論文類型：學(xué)位論文

【摘要】：彈性流體動壓潤滑（簡稱彈流潤滑）是滾動軸承和齒輪等高副接觸機械零件的主要潤滑機制，油膜厚度的測量是其研究的基本內(nèi)容。長期以來，彈流油膜厚度的彩色光干涉測量主要圍繞具體的技術(shù)應(yīng)用和儀器設(shè)計進(jìn)行，測量原理的深入研究并不多見。本文針對彈流油膜雙色光干涉測量建立了理論模型，對測量原理和條件進(jìn)行了分析，并以此建立了新的測量技術(shù)。 基于薄膜光學(xué)的多光束干涉理論和攝像系統(tǒng)的光譜響應(yīng)特性，建立了潤滑油膜彩色光干涉測量的色度學(xué)模型；以紅綠雙色光作為輸入光源，設(shè)計了完整的計算程序以計算光彈流系統(tǒng)的干涉色彩。為驗證理論分析的正確，建立了球-盤油潤滑靜態(tài)接觸間隙的雙色光干涉測量系統(tǒng)，干涉色彩的理論計算和實驗測量取得了很好的一致性。 對彈流潤滑油膜的雙色光干涉測量系統(tǒng)的光學(xué)特性進(jìn)行了系統(tǒng)的理論分析。揭示光源功率譜、析光膜厚度、墊層厚度及潤滑介質(zhì)特性對雙色光干涉色彩的影響。計算表明，在所用的計算參數(shù)條件下，窄的色光帶寬、4-10nm的Cr膜厚度會形成較好的干涉圖像。 使用鋼球-盤接觸在沖擊-卷吸復(fù)合運動條件下的油膜厚度的模擬結(jié)果，對這一過程進(jìn)行了雙色光干涉的顏色復(fù)現(xiàn)模擬，對其測量的圖像特征進(jìn)行了觀察。對等溫牛頓流體的穩(wěn)態(tài)彈流潤滑油膜厚度進(jìn)行了數(shù)值計算，利用該結(jié)果對不同卷吸速度和不同載荷下的雙色光干涉圖像進(jìn)行了顏色復(fù)現(xiàn)模擬，討論了在不同速度和載荷下的干涉圖像的顏色特征。 基于以上理論分析，提出了一種新的彈流潤滑油膜雙色光干涉測量的RG方法，該方法通過對比獲得測量點的偽周期數(shù)，自動判定待測區(qū)域的油膜厚度，理論分析和離線測量表明該方法是可行和實用的。
[Abstract]:Elastohydrodynamic lubrication (EHL) is the main lubrication mechanism of rolling bearing and gear etc. The measurement of oil film thickness is the basic content of its research for a long time. The color light interferometry of elastohydrodynamic oil film thickness is mainly carried out around the specific technical application and instrument design, and the measurement principle is seldom studied. In this paper, a theoretical model is established for the elastohydrodynamic oil film two-color optical interferometry. The principle and condition of measurement are analyzed, and a new measuring technique is established. Based on the multi-beam interference theory of film optics and the spectral response characteristics of the camera system, a colorimetric model for color light interference measurement of lubricating oil film is established. A complete calculation program is designed to calculate the interference color of the photoelastic fluid system using the red and green double color light as the input light source to verify the correctness of the theoretical analysis. A two-color light interference measurement system for static contact clearance lubricated by ball and disk oil is established. The theoretical calculation of interference color is in good agreement with the experimental measurement. The optical characteristics of the two-color optical interferometry system for elastohydrodynamic lubricating oil film are systematically analyzed. The power spectrum of the light source and the thickness of the film are revealed. The influence of cushion thickness and lubricating medium characteristics on the color of two-color light interference. The calculation shows that under the conditions of the calculated parameters, the narrow bandwidth of color light is obtained. A better interference image can be formed when Cr film thickness is between 4 nm and 10 nm. Using the simulation results of the oil film thickness of the steel ball disk contact under the condition of impact-entrainment composite motion, the color reproduction simulation of the two-color light interference is carried out. The measured image characteristics were observed and the thickness of steady elastohydrodynamic lubricating oil film of isothermal Newtonian fluid was calculated numerically. The results are used to simulate the color reproduction of two-color light interference images under different entrainment speeds and loads, and the color characteristics of interference images under different speeds and loads are discussed. Based on the above theoretical analysis, a new RG method for the measurement of two-color optical interference of elastohydrodynamic lubricating oil film is proposed. By comparing the pseudo-period number of measured points, the thickness of oil film in the area to be measured is automatically determined. Theoretical analysis and offline measurement show that this method is feasible and practical.
【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH744.3;TH117

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