The advantages of selective laser melting (SLM) for manufacturing industrial fifilters with low resistance

low energy consumption and high filtration performance are analyzed. Explored the design method of gradient porous structure fifilter based on SLM process

and designed the fifiltration with difffferent porosity (60%

70%

80% and 90%) under three difffferent units of cross

star and vintiles based on the design rules. Use XFlow software to simulate the pressure drop-flflow experiment of the fifilter

analyze the forming effffect of the fifilter made by SLM

and fifinally carry out the pressure drop test and discuss the flflow of the flfluid when the flfluid passes through the structure. The results show that the gradient porous structure design method realizes a gradient change in the pore size of the fifilter in the radial direction

and the gradient can be adjusted by the number of nodes in each layer. The CFD simulation and pressure drop test shows that the cross structure and the star structure have similar pressure drop performance. The vintiles structure has the lowest pressure drop under the same porosity. The post-processed part pressure drop experiment value deviates from the CFD simulation value by 10%–20%. CFD simulation technology can effffectively predict the pressure drop of the fifilter and prompt the optimization direction of structural flflow resistance.