Optimal Design of the Hole Shape of the Air Suction Porous Turntable and Analysis of Adsorption Characteristics of Flexible Blades

ABSTRACT To improve the adsorption effect of air suction sorting equipment, in this study, flexible blades were used as test materials, and porous turntables with circular holes (A), rectangular holes (B), and rectangular‐circular holes (C) were designed. Fluent software was used to simulate and analyze the aerodynamic characteristics of the flow field at the porous turntable, and the blade falling adsorption bench test was built. Under the same test conditions, the adsorption blades of the porous turntable were photographed by a high‐speed camera. Based on the C‐hole turntable and the tuyere air pressure of 380 Pa, it is verified by a single‐factor test that the blade falling in the distance of the porous turntable, the rotating speed of the turntable, and the number of blades extending perpendicular to the direction of movement have a direct effect on the blade adsorption of the porous turntable. To obtain the optimum adsorption conditions for the bench test, an orthogonal test was used, and a certain number of leaves were used for the test while the adsorption efficiency was considered; it is found that when the distance from the porous turntable is 40 mm, the rotation speed of the turntable is 60 r/min and the number of transverse blades of the conveyor belt is 4, and 100% adsorption can be achieved. In summary, the research results and methods of this experiment can provide reference and guidance for the research group to carry out the follow‐up research and development of multi‐stage air suction sorting equipment.