本文關(guān)鍵詞： 彈性流體動(dòng)壓潤滑 微液滴 毛細(xì)力 鋪展 乏油　出處：《青島理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：油氣潤滑技術(shù)是一種先進(jìn)的潤滑技術(shù)。實(shí)際上，油氣潤滑供油時(shí)進(jìn)入摩擦副形成潤滑油膜的是一些離散的微小潤滑油液滴。本文實(shí)驗(yàn)研究了單個(gè)微小潤滑油液滴在進(jìn)入球-盤接觸區(qū)前后的靜態(tài)鋪展現(xiàn)象以及純滾動(dòng)下潤滑油膜的動(dòng)態(tài)生成特性。主要研究?jī)?nèi)容包括： （1）實(shí)驗(yàn)觀察了微液滴在球盤靜態(tài)接觸間隙中的鋪展行為。 微液滴在進(jìn)入球盤接觸區(qū)之前由于毛細(xì)力作用發(fā)生鋪展變形，直接影響潤滑油膜的生成。研究了不同種類的潤滑油形成的微液滴在不同體積、不同界面、不同載荷下的鋪展時(shí)間，鋪展距離，以及鋪展速度的變化規(guī)律。研究表明，隨著微液滴的尺寸的增加，微液滴的鋪展速度增加；隨著潤滑油粘度的增加，液滴鋪展速度減小。微液滴在高表面能界面上具有較大的鋪展速度。當(dāng)表面張力較小時(shí)，液滴的初始鋪展半徑變大，鋪展距離明顯減小，且產(chǎn)生二次鋪展現(xiàn)象。 （2）研究了微液滴供油條件下的彈流油膜動(dòng)態(tài)形成過程。 油氣潤滑的供油由微小的潤滑油液滴完成。首先針對(duì)單一液滴（0.1μl）供油下的潤滑過程進(jìn)行試驗(yàn)觀察，研究了潤滑時(shí)間同卷吸速度的關(guān)系。其次研究了純滾動(dòng)條件下當(dāng)潤滑油粘度和卷吸速度變化時(shí)微液滴尺寸對(duì)油膜形狀的影響。結(jié)果表明：潤滑時(shí)間隨速度的增加而減少。卷吸速度、液滴尺寸對(duì)潤滑油膜的形成具有決定性影響。 （3）測(cè)量了微量潤滑條件下的乏油潤滑行為。 微液滴供油下的潤滑，，本質(zhì)上可認(rèn)為是一種乏油條件潤滑，因此對(duì)少量潤滑油供油時(shí)的潤滑特性的研究具有重要意義。設(shè)計(jì)相關(guān)實(shí)驗(yàn)對(duì)微量潤滑條件下的乏油潤滑進(jìn)行了試驗(yàn)觀察。研究結(jié)果表明：卷吸速度越大，出口區(qū)乏油情況越嚴(yán)重。通過數(shù)值模擬得到的結(jié)果與試驗(yàn)現(xiàn)象基本吻合。
[Abstract]:Oil and gas lubrication is an advanced lubrication technology. In fact, In this paper, the static spreading phenomenon of a single tiny lubricating oil droplet before and after entering the ball disk contact area and its purity were studied. The dynamic forming characteristics of lubricating oil film under rolling. The main research contents are as follows:. The spreading behavior of microdroplets in the static contact gap of the ball disk was observed experimentally. Before entering the contact area of the ball disk, the microdroplets were spread and deformed by capillary force, which directly affected the formation of lubricating oil film. The effects of different kinds of lubricating oil on the formation of microdroplets in different volume and interface were studied. The variation of spreading time, spreading distance and spreading speed under different loads. The results show that with the increase of the size of microdroplets, the spreading speed of microdroplets increases, and the viscosity of lubricating oil increases. When the surface tension is small, the initial spreading radius of the droplet becomes larger, the spreading distance decreases obviously, and the secondary spreading phenomenon occurs. The dynamic formation process of elastohydrodynamic oil film under the condition of microdroplet oil supply was studied. The oil supply of oil and gas lubrication is accomplished by small droplets of lubricating oil. First, the lubrication process under the single drop of 0.1 渭 l is observed experimentally. The relationship between lubricating time and entrainment speed is studied. Secondly, the influence of the size of microdroplet on the film shape when the viscosity and entrainment velocity of lubricating oil changes under pure rolling condition is studied. The results show that the lubrication time increases with the increase of speed. And reduce the speed of entrapment, Droplet size has a decisive effect on the formation of lubricating oil film. The lubricating behavior of spent oil under trace lubrication was measured. The lubrication under the microdroplet oil supply can be regarded as a kind of lubrication under the condition of lack of oil in essence. Therefore, it is of great significance to study the lubrication characteristics of a small amount of lubricating oil when it is supplied. The experimental observation on the lubrication of the spent oil under the condition of micro lubrication is carried out. The results show that the higher the entrainment speed is, The results obtained by numerical simulation are in good agreement with the experimental phenomena.
【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TH117.2

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