Lubricating oil filters are widely used in automobiles, ships, chemicals, aviation, aerospace and other industries.Depending on the application, the designed types and varieties are also different. Filter, the second is the oil filter (fuel and smooth oil). The aviation smooth oil filter is mainly used in the aviation engine. There are two indexes to evaluate the filter performance: filtration efficiency and pressure loss. With traditional filters, large particles of impurities can be intercepted by the filter, while small particles of impurities can still pass through the pores of the filter.
If in order to reach a higher filtration efficiency, the filter screen may be encrypted, but this will increase the pressure loss of the filter; if the filter pores are enlarged to reduce the pressure loss, the filtration efficiency will be greatly reduced. Therefore, it is difficult to improve the performance of the filter by the traditional method, as long as the filter performance is improved by improving the filter structure. When designing the filter, while ensuring economic efficiency and reasonable strength requirements, we must consider the performance of the filter from two aspects, that is, while pursuing high filtration efficiency, we must also consider the impact of pressure loss on the filter. .
An important element in designing filters is the driving force. The driving force source can be gravity, suction, positive pressure or applied centripetal force. The filter used is a metal wire mesh and plain weave. The filtering mechanism of the filter screen includes interception, inertia, diffusion, sedimentation, and hydrodynamic effects. Among them, the main effect is the interception effect under the initial conditions of filtration, which determines the filtration efficiency. Using CFD-based numerical simulation method, the performance parameters of the filter can be optimized by changing the activity parameters and construction parameters, which greatly reduces the design cost compared with the experiment. Based on the porous step surface in the porous media model, the design of the mesh filter was completed, and the numerical simulation method was used.After studying the pressure loss and filtration efficiency of the filter at different flow speeds, the performance of the lubricating oil filter stopped. optimization.