闫灯奎,马志豪,陈卫,等.振动对不同滤纸油水分离效率影响的研究[J].内燃机工程,2023,44(3):83-90.
振动对不同滤纸油水分离效率影响的研究
Study on Effects of Vibration on the Diesel–Water Separation Efficiency of Different Filter Paper
DOI：10.13949/j.cnki.nrjgc.2023.03.010
关键词:振动  分离效率  滤纸  碰撞  破碎
Key Words:vibration  separation efficiency  filter paper  collision  fracture
基金项目:国家自然科学基金项目（51906061）；河南省重点研发与推广专项项目（192102310238）
作者单位E-mail
闫灯奎* 河南科技大学 车辆与交通工程学院，洛阳 471003 yandk00@163.com 
马志豪* 河南科技大学 车辆与交通工程学院，洛阳 471003 mazhihao@haust.edu.cn 
陈卫 达菲特过滤技术股份有限公司，苏州 215126  
王楠 达菲特过滤技术股份有限公司，苏州 215126  
王鑫 河南科技大学 车辆与交通工程学院，洛阳 471003  
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摘要:为了探究不同结构滤纸在振动条件下的油水分离效率的规律，搭建并使用振动柴油–水分离试验台在振动频率为20 Hz、50 Hz、100 Hz、150 Hz、200 Hz和300 Hz，振动加速度为9.8 m/s2，19.6 m/s2，39.2 m/s2，58.8 m/s2和78.4 m/s2，柴油–水界面张力为22 mN/m，等效面流速为5 cm/min的条件下对4种不同结构的商用滤纸进行油水分离试验。试验结果表明：在4g振动加速度下，油水分离效率仅在20 Hz的低频振动条件下有明显变化；单层滤纸与复合滤纸相比，在振动条件下的油水分离效率变化更明显；沿X方向（柴油流动方向）的振动与沿Y方向（与柴油流动方向垂直且与地面平行的方向）和Z方向（与地面垂直的方向）相比，油水分离效率降低幅度更大；低频振动使水滴提前脱离纤维，并因振动产生的惯性碰撞而破碎导致油水分离效率下降。随着振动加速度的增大，油水分离效率降低，1号（单层聚结式滤纸）、3号（单层阻拦式滤纸）、4号（复合阻拦式滤纸）滤纸在78.4 m/s2的振动加速度下油水分离效率分别下降了7.2%、6.7%、3.4%。
Abstract:In order to investigate the law of oil–water separation efficiency of filter paper with different structures under vibration conditions， a vibration-diesel–water separation test rig was built. The oil–water separation tests were conducted on four pieces of commercial filter paper of different structures under the vibration frequencies of 20 Hz， 50 Hz， 100 Hz， 150 Hz， 200 Hz， and 300 Hz， with vibration accelerations of 9.8 m/s2， 19.6 m/s2， 39.2 m/s2， 58.8 m/s2 and 78.4 m/s2， diesel–water interfacial tension of 22 mN/m and equivalent surface flow rate of 5 cm/min. The results showed that under the condition of 4g vibration acceleration， the oil–water separation efficiency changed significantly with a low-frequency vibration of 20 Hz. Under different vibration conditions， the oil–water separation efficiency of single-layer filter paper changed more significantly compared with that of composite filter paper. The vibration along the X direction （the same direction as the flow of diesel oil） led to a precipitous decrease in oil–water separation efficiency than along the Y direction（direction perpendicular to the direction of diesel flow and parallel to the ground） and Z direction （direction perpendicular to the ground）. The main reason for the decrease in oil–water separation efficiency was that the low-frequency vibration caused the water droplets to break away from the fibers in advance， and the water droplets collided and broke with the fibers due to the inertia generated by the vibration. The greater the vibration acceleration， the lower the oil–water separation efficiency. Under a vibration acceleration of 78.4 m/s2， the oil–water separation efficiency of filter paper No.1（single-layer coalescence filter paper）， No.3（single-layer intercept filter paper）， and No.4 （composite intercept filter paper） decreases by 7.2%， 6.7%， and 3.4%， respectively.
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