基于压力法测定润滑油水分装置的研究

发布时间：2018-02-13 22:24

本文关键词： 船舶润滑油水分检测装置　出处：《大连海事大学》2015年硕士论文　论文类型：学位论文

【摘要】：船舶润滑油的水分含量作为油液理化指标的重要部分,对润滑油的润滑性能判断具有非常重要的意义。目前,船舶润滑油的水分检测通常是在实验室中采用传统蒸馏法测定的,虽然蒸馏法测得的结果满足水分检测的要求,但是这种方法除具有实验耗时长、实验操作时的环境相对稳定、实验所用到的仪器较多等缺点外,还不能实现船舶润滑油的现场测量。本论文利用过氧化钠与润滑油中的水分反应,测得装置反应容器内气体压力的变化,根据已标定的水分含量与压力变化的关系曲线,从而推算出润滑油中所含的水分。研制出一种能够在船舶现场快速测定润滑油水分含量的装置,论文主要进行了以下工作：(1)完成了整体装置的设计与制造,采用高精度压力传感器采集反应容器内的压力变化信号,经AVR型单片机处理压力信号后,通过DMI28641型液晶显示器显示测量结果。(2)探究过氧化钠与水的反应过程,优选一种能够在反应过程中溶解润滑油的无水有机溶剂以及一种起催化作用的试剂。(3)探究过氧化钠和水反应过程中润滑油实际含水量与所测压力的关系,利用最小二乘法拟合曲线,编入AVR型单片机程序。完成装置自动控制程序的设计、调试,得到测量范围为0-1.2%的润滑油水分测量装置的工程样机。(4)用传统蒸馏法和本文研制的装置对比测量了不同含水量的润滑油试样,评估所研制装置的测量精度。
[Abstract]:As an important part of oil physical and chemical index, the moisture content of ship lubricating oil is very important to judge the lubricating oil performance. At present, the water content of ship lubricating oil is usually measured by traditional distillation method in laboratory. Although the results obtained by distillation method meet the requirements of water detection, this method has the disadvantages of long experimental time, relatively stable environment during experimental operation, more instruments used in experiments, etc. In this paper, the change of gas pressure in the vessel is measured by the reaction of sodium hydroxide with the moisture in the lubricating oil, according to the curve of the relationship between the water content and the pressure change. Thus, the moisture content in lubricating oil is calculated. A device that can quickly measure the moisture content of lubricating oil on the spot of ship is developed. The main work of this paper is as follows: 1) the design and manufacture of the whole unit have been completed. High precision pressure sensor is used to collect the pressure change signal in the reaction vessel. After the pressure signal is processed by AVR singlechip, the reaction process between sodium oxide and water is studied through DMI28641 liquid crystal display display. An anhydrous organic solvent capable of dissolving lubricating oil in the reaction process and a catalytic reagent. 3) to explore the relationship between the actual water content of lubricating oil and the measured pressure during the reaction of sodium oxide and water. Using the least square method to fit the curve, programmed the AVR single chip microcomputer program, completed the design and debugging of the automatic control program of the device, The engineering prototype of the oil moisture measuring unit with the range of 0-1.2% was obtained. The conventional distillation method was used to measure the lubricating oil samples with different moisture content compared with the apparatus developed in this paper, and the measuring accuracy of the equipment was evaluated.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U677

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