通用锂基润滑脂雾化过程实验研究

发布时间：2018-09-10 14:59

【摘要】：油雾润滑技术是利用外界作用力或能量,将液态的润滑油雾化成小颗粒,小颗粒与空气混合成油雾,在自身的压力能下,作用于需要润滑的部位。一般使用的润滑介质选用润滑油,即常用的矿物油,合成油等液体油。但是此种润滑介质不能很好的用于一些极端情况,例如难以经常加油的摩擦部位上。本课题所研究的润滑介质为润滑脂,相比润滑油具有密封作用、减少振动和噪声的效能。因此润滑脂雾化特性的研究具有重要的理论和现实意义。以通用锂基脂的雾化特性为研究对象,旨在分析各个因素对雾化特性的影响作用的大小,为工业环境中选择润滑脂、喷嘴等提供理论参考。由于对润滑脂的雾化研究较少,因此本文中润滑系统的设计参考了现代较为成熟的无气喷涂技术。对雾化特性理论的研究则参考了润滑油雾化特性。在查阅了上述资料以及对研究现状进行了综述的基础上,提出了本文的具体研究目的、内容和方法。首先,对主流的雾化机理、液滴及液膜的破碎机理的认识。对前人的研究进行了总结,阐述了各个解释的适用范围以及其局限性。对各个测量量进行了说明,为下面的系统设计和实验方案奠定了基础。其次参考现有的喷涂技术,对各个部件选型,搭建实验平台。最后通过实验测量不同情况下雾化粒度、喷射流量、雾化角。从而判断黏度、喷嘴截面对雾化特性的影响。通过以上的工作得出下面的结论:(1)使用同一种喷嘴,当使用不同的润滑脂进行喷射雾化时,由于润滑脂粘度的不同使得雾化角不同。而且在一般情况下随着黏度的增大,喷雾角减小。最后由于喷嘴的限制,雾化角不会再增大。而且使用同一种喷嘴喷射不同种类润滑脂时,其雾化粒度不是一成不变的。其总的趋势总是随着黏度的增大,雾化粒度先变大然后变小。(2)使用同一种润滑脂,当使用不同的喷嘴进行喷射雾化时,由于喷嘴截面的不同使得雾化角不同。同时不同的喷嘴其雾化粒度也是不一样的。说明雾化粒度与喷嘴截面有关。
[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.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE626.4

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