【作者】 卢继霞；

【导师】 贾瑞清；

【作者基本信息】 中国矿业大学（北京） ， 机械设计及理论， 2011， 博士

【摘要】 介质恒压堵塞型固体颗粒污染度检测传感器的关键元件是微孔滤膜。本文研究了微孔滤膜的两种制作方案——在600目平纹不锈钢丝网表面实施光亮硫酸盐镀铜或化学镀镍,拟定了不锈钢丝网镀覆前的预处理工艺,获得了不同施镀时间下两种镀层的微孔滤膜。以DW1污染检测仪为检测仪器,研制了基于Visual Basic 6.0和Excel的实验数据采集系统,实现了对滤膜传感器流量变化数据的实时接收和保存。通过实验研究探讨了微孔滤膜的堵塞机理,结果表明在滤膜传感器检测过程中,颗粒的主要作用是在堵孔,检测过程处于滤膜的初始堵塞阶段,堵塞机理为标准孔堵塞。在此基础上,建立了10μm×10μm微孔滤膜的污染度检测模型,确定了膜孔堵塞系数f10和f0’的值,给出了确定样液中固体颗粒分布及样液污染度的方法。最后通过实验验证了该传感器检测的重复性和精度。更多还原

【Abstract】 The key element of medium-blocking-type sensor under constant pressure used for solid particle contamination level testing is the micro-pore filter membrane. Two kinds of methods to make the micro-pore filter membrane are studied, i.e., the bright copper plating in sulphate solution or electroless nickel-plating on 600# plain weave stainless steel wire meshes. By using the pre-treatment technique determined in this paper before plating, the micro-pore filter membranes with two kinds of plating layers and different plating time are obtained. An experimental data collecting system for DW1 contamination level tester based on Visual Basic 6.0 and Excel is developed, thus, the flowrate data coming from the filter membrane can be acquired and saved in real time. The blocking mechanism of the micro-pore filter membrane is discussed based on experimental study. It is concluded that the main role of solid particles during testing is to block the pores, and the whole testing process lies on the initial blocking moment of the micro-pore filter membrane, therefore, the blocking mechanism is standard pore blocking. Then, the contamination level testing model for the micro-pore filter membrane of 10μm×10μm is established, two pore blocking coefficients, f10 and f0’, are determined experimentally, and the methods of determining solid particle contributions in oil and contamination level of oil samples are given. At last, the repeatability and accuracy of the micro-pore filter membrane sensor are proved by experimental data.更多还原