Experimental study of oil mist characteristics generated from minimum quantity lubrication and flood cooling
Experimental study of oil mist characteristics generated from minimum quantity lubrication and flood cooling
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DOI：
10.1016/j.enbenv.2020.05.005
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Yiwen Wang;Alicia Murga;Z. Long;S. Yoo;Kazuhide Ito
中科院分区：
文献类型：
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作者：
Yiwen Wang;Alicia Murga;Z. Long;S. Yoo;Kazuhide Ito
在加工过程中使用金属加工液会产生油雾，危害工人的健康。为了研究车削加工过程中油雾的特性和排放规律，本研究搭建了车削加工过程模拟试验台。通过单因素实验，研究了在最小润滑(MQL)模式和溢流冷却模式下影响油雾生成的参数，分析了油雾的形成机理。结果表明，MQL系统产生的油雾主要有两个来源，一是油雾最初逸出到空气中，二是油雾蒸发/凝结。在MQL模式下，离心力对油雾的形成几乎没有影响。MQL系统产生的油雾质量浓度与切割油的流量成正比。在常温下，增大送风压力和喷嘴距离，油雾质量浓度增大。在液泛冷却模式下，离心气溶胶浓度与工件产生的相对离心力呈线性正相关，决定系数R2在0.97以上。MQL模式下的油雾质量浓度为8.33亿mg/m~3~305.88 mg/m~3。MMD和SMD分别为0.74微米到4.42微米和0.31微米到2.14微米。洪水冷却方式下的油雾质量浓度为0.2~22.42 mg/m~3。MMD和SMD分别为1.81微米到6.58微米和0.45微米到5.13微米。
The use of metalworking fluids during machining can generate oil mist and endanger the health of workers. In order to study the characteristics and emission laws of oil mist generated by machining, this study constructed a test bench to simulate the turning process. Parameters affecting the oil mist generated in the minimum quantity lubrication (MQL) mode and flood cooling mode were studied by means of single-factor experiments, and the formation mechanisms of oil mist were analyzed. The results show that the oil mist generated by the MQL system has two main sources, the initial escape of oil mist into the air and the evaporation/condensation of oil mist. The centrifugation has almost no effect on oil mist formation in the MQL mode. The mass concentration of oil mist generated by the MQL system is proportional to the cutting oil flow rate. When the work-piece is at room temperature, increasing the air supply pressure and nozzle distance, increases the oil mist mass concentration. For the flood cooling mode, the concentration of centrifugal aerosol is linearly and positively correlated with the relative centrifugal force generated by the work-piece, and the coefficient of determination (R2) is above 0.97. The oil mist mass concentrations in MQL mode is 8.33 mg/m3~ 305.88 mg/m3. The MMD and SMD are 0.74 µm to 4.42 µm and 0.31 µm to 2.14 µm, respectively. The oil mist mass concentrations in flood cooling mode is 0.2 mg/m3~ 22.42 mg/m3. The MMD and SMD are 1.81 µm to 6.58 µm and 0.45 µm to 5.13 µm, respectively.