基于CFD仿真的微型电动吸尘车抽吸系统的改进分析

Analysis on the improvement of the suction systemof the mini electric vacuum sweeper based on CFD simulation

采用CFD软件对吸嘴、反吹系统、风道、灰箱等重要部件进行流体仿真分析。吸嘴采用导引加反吹方式,保持吸嘴口处的流体动能并有效提高抽吸能力,气流分两路并通过设计分流管道大小保持阻力均衡,反吹量控制25%时的滤筒阻力仅为原来56%。采用惯性降尘法,对于100μm以上颗粒的除尘率可达99.3%。为进一步减小流体内循环阻力并提高整个抽吸系统的效率,提出一种风机双向分流供给反吹系统和滤筒的平衡利用方式。

Fluid simulation analysis of important components of a mini electric vacuum sweeper,such as suction nozzles,blowback systems,air ducts and ash boxes,was performed with CFD software.Through guidance and blowback methods,the fluid kinetic energy at the mouth of the suction nozzle was maintained and suction capacity was effectively improved.Airflow was divided into two paths and the resistance was balanced by changing the size of the shunt pipe.When the blowback volume was controlled at 25%,the resistance of the cartridge was only 56%of the original.The removal rate of particles above 100μm reached 99.3%by inertial dust reduction method.In order to further reduce the internal circulation resistance of the fluid and improve the efficiency of the entire suction system,a balanced utilization method for the blowback system with bidirectional supply and cartridge was proposed.