润滑油中磨粒分析磁滤谱仪滤端结构设计

Design of Filter Construction in Magnetic Filter for Wear Debris Analysis in Oil

为解决磁滤谱仪的磁铁安装和滤膜放置等问题,对磁滤谱仪进行磁场分析。首先采用ANSYS workbench模块,通过变换2个磁铁块的相对位置和磁极方向,分析沉积面磁感应强度的大小。结果表明:在沉积面上磁铁相互吸引的状态比磁铁相互排斥的状态的磁感应强度要大,2个平行磁铁块距离越近,则在沉积面形成的磁场越强,并且磁场方向与沉积面是平行的。然后采用ANSYS(APDL)模块,在workbench分析的基础上,通过对2个磁铁块的磁感应强度和磁场强度模拟发现,在两者中心位置有磁感应盲区;通过映射路径的方法发现,在磁铁块上方2 mm的平面处出现了磁感应强度最大值,滤膜放置在此位置效果最佳。

To solve the problem of magnet installation and membrane placement,the magnetic field of magnetic filter was mainly analyzed. Firstly,ANSYS workbench was used to analyze the magnetic induction intensity on sedimentary surface by changing the relative position and direction of magnetic pole of two magnet piece. The result shows that,the magnetic induction intensity is stronger while the magnets attract each other than magnets repel each other on the sedimentary surface. The closer two parallel magnet pieces are,the stronger the magnetic field is formed on the sedimentary surface which is parallel with the magnetic field direction. On the basis of analysis by workbench,APDL module was used to simulate the magnetic induction intensity of the two magnet pieces. The result shows that,there is a blind area at the center of the two magnetic pieces. By using the method of mapping path,it is found that the maximum magnetic induction intensity is appeared at the plane 2 mm above the magnet pieces,where is the best position for filter membrane.