In order to manufacture a new kind of filter with low pressure drop and low flow resistance,the advantages of manufacturing filters directly by selective laser melting (SLM) technology were analyzed. Two type metal filters with percentage sieving area of 51.02% and 59.17% was designed,and was processed by self-developed SLM equipment. This paper analyzes the effect of filter processing and carry on the simulation of filter pressure drop and flow rate characteristics,it is also introduces the research line of applying computational fluid dynamics(CFD)technology in the design of high efficiency and low resistance filter structure and SLM manufacturing method. The results show that,SLM technology can directly manufacture complex porous filter and filter structure,and the error of the size of the filter hole and the diameter of the wire is below 0.1 mm. But due to the heat effect,the lattice node is easy to occur in relatively large size when manufacturing porous filter structure. In the pressure drop test,the filter with a higher percentage sieving area performs lower pressure drop.%为制造出低压降、低流动阻力的新型过滤器,分析了激光选区熔化(SLM)技术直接制造的优势.设计了两型筛分面积百分率分别为51.02%、59.17%的金属过滤器,利用自主研发的SLM设备进行加工,分析其加工效果并对压降和流速特性进行仿真,介绍了运用计算流体力学技术设计高效低阻过滤结构及以SLM技术制造的研究路线.结果表明:SLM技术可直接成形复杂多孔过滤结构和过滤器,过滤网孔尺寸和金属丝径的误差均低于0.1 mm;但因热影响,网格结点处易发生成形尺寸偏大的问题;在压降-流量试验中,拥有更高筛分面积百分率的过滤器具有更低的压降.
展开▼
