Relationship between flow field characteristics and dust collection efficiency of sweeper suction port

Abstract

Abstract Urban pollution caused by road particles is widely criticized. The complex and changeable internal flow field of the dust suction port has the greatest influence of the dust suction operation effect. The aim of this paper is to explore the influence law of various influencing factors on the flow field characteristics of the sweeper’s dust suction port, and reveal its influence mechanism on the dust suction efficiency of the dust suction port. The results of the study show that: increasing the width and outlet diameter will change the flow field characteristics, and the dust suction efficiency will change accordingly, 500 mm and 280 mm are the best width and outlet diameter respectively. The increase of driving speed will increase the relative speed between the inlet surface and dust particles, causing dust particles to spill. The increase of negative pressure at the outlet will increase the flow field characteristics, but the dust suction efficiency will stop when it increases to a certain value. A new dust suction port structure is proposed to further improve the dust suction efficiency. This study can provide a reference for the design of the dust suction port.