【摘要】：油霧潤滑技術(shù)是利用外界作用力或能量,將液態(tài)的潤滑油霧化成小顆粒,小顆粒與空氣混合成油霧,在自身的壓力能下,作用于需要潤滑的部位。一般使用的潤滑介質(zhì)選用潤滑油,即常用的礦物油,合成油等液體油。但是此種潤滑介質(zhì)不能很好的用于一些極端情況,例如難以經(jīng)常加油的摩擦部位上。本課題所研究的潤滑介質(zhì)為潤滑脂,相比潤滑油具有密封作用、減少振動(dòng)和噪聲的效能。因此潤滑脂霧化特性的研究具有重要的理論和現(xiàn)實(shí)意義。以通用鋰基脂的霧化特性為研究對象,旨在分析各個(gè)因素對霧化特性的影響作用的大小,為工業(yè)環(huán)境中選擇潤滑脂、噴嘴等提供理論參考。由于對潤滑脂的霧化研究較少,因此本文中潤滑系統(tǒng)的設(shè)計(jì)參考了現(xiàn)代較為成熟的無氣噴涂技術(shù)。對霧化特性理論的研究則參考了潤滑油霧化特性。在查閱了上述資料以及對研究現(xiàn)狀進(jìn)行了綜述的基礎(chǔ)上,提出了本文的具體研究目的、內(nèi)容和方法。首先,對主流的霧化機(jī)理、液滴及液膜的破碎機(jī)理的認(rèn)識。對前人的研究進(jìn)行了總結(jié),闡述了各個(gè)解釋的適用范圍以及其局限性。對各個(gè)測量量進(jìn)行了說明,為下面的系統(tǒng)設(shè)計(jì)和實(shí)驗(yàn)方案奠定了基礎(chǔ)。其次參考現(xiàn)有的噴涂技術(shù),對各個(gè)部件選型,搭建實(shí)驗(yàn)平臺(tái)。最后通過實(shí)驗(yàn)測量不同情況下霧化粒度、噴射流量、霧化角。從而判斷黏度、噴嘴截面對霧化特性的影響。通過以上的工作得出下面的結(jié)論:(1)使用同一種噴嘴,當(dāng)使用不同的潤滑脂進(jìn)行噴射霧化時(shí),由于潤滑脂粘度的不同使得霧化角不同。而且在一般情況下隨著黏度的增大,噴霧角減小。最后由于噴嘴的限制,霧化角不會(huì)再增大。而且使用同一種噴嘴噴射不同種類潤滑脂時(shí),其霧化粒度不是一成不變的。其總的趨勢總是隨著黏度的增大,霧化粒度先變大然后變小。(2)使用同一種潤滑脂,當(dāng)使用不同的噴嘴進(jìn)行噴射霧化時(shí),由于噴嘴截面的不同使得霧化角不同。同時(shí)不同的噴嘴其霧化粒度也是不一樣的。說明霧化粒度與噴嘴截面有關(guān)。
[Abstract]:The technology of oil mist lubrication is to atomize the liquid lubricating oil into small particles by using external force or energy, and mix small particles with air to form oil mist. Under its own pressure energy, it acts on the parts that need to be lubricated. The lubricating medium commonly used is lubricating oil, which is commonly used mineral oil, synthetic oil and other liquid oil. However, the lubricating medium can not be used well in extreme cases, such as friction parts where it is difficult to refuel frequently. The lubricating medium studied in this paper is grease, which has sealing effect, reducing vibration and noise compared with lubricating oil. Therefore, the study of atomization characteristics of grease has important theoretical and practical significance. The atomization characteristics of general lithium-based lithium-base lipids were studied in order to analyze the influence of various factors on the atomization characteristics and to provide theoretical reference for selecting grease and nozzles in industrial environment. Because there are few researches on the atomization of lubricating grease, the design of lubrication system in this paper refers to the modern and mature airless spraying technology. The atomization characteristics of lubricating oil are studied in this paper. On the basis of consulting the above data and summarizing the present research situation, this paper puts forward the concrete research purpose, content and method of this paper. First of all, the main atomization mechanism, droplet and film crusher mechanism. This paper summarizes the previous studies, expounds the scope of application of each interpretation and its limitations. The various measurements are explained, which lays a foundation for the system design and experimental scheme below. Secondly, referring to the existing spraying technology, the selection of each component, build the experimental platform. Finally, the atomization particle size, spray flow rate and atomization angle were measured experimentally. The influence of viscosity and nozzle section on atomization characteristics is judged. The following conclusions are drawn from the above work: (1) the atomization angle of the same nozzle is different when different grease is used for spray atomization because of the different viscosity of grease. In general, the spray angle decreases with the increase of viscosity. Finally, due to the limitation of nozzle, the atomization angle will not increase again. And the atomization granularity is not constant when the same nozzle is used to spray different kinds of grease. With the increase of viscosity, the atomization granularity increases first and then decreases. (2) when different nozzles are used for spray atomization, the atomization angle is different because of the different nozzle cross section. At the same time, the atomization size of different nozzles is different. The atomization particle size is related to the nozzle section.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE626.4

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