Abstract:Aiming to determine the screening performance of the vibration screen with different motion forms, the dispersion of particles on the plane reciprocating vibration screen, the vibration screen with three translations and one swing, and the vibration screen with three translations and two rotations were studied. Based on the nonlinear law of particle moving, the movements of particles on different screens with different motions were simulated by Matlab. The dispersity was taken as the experimental index. The motions of maize particles on three kinds of vibrating plate were tracked by high speed camera. The motion law of the particles on the vibration plate verified the correctness of the results of nonlinear law of particle moving based on theoretical analysis. The dispersity of the particles on the three kinds of vibration plates was increased firstly and then decreased with the increase of the spindle speed of the vibrating screen. At optimum rotating speed of the main shaft of the vibrating screen, the comprehensive dispersion of the maize particle group on the vibration plate with three translations and one swing and the vibration plate with three translations and two rotations were respectively 38.96mm and 40.73mm, which were 14.39% and 19.58% higher than that of the plane reciprocating vibration plate. The screening efficiency was taken as test index, and vibrating screens with three kinds of motions were tested for screening material. The results of material screening test showed that the screening efficiency of particle group on three kinds of vibrating screens from high to low was: the vibration screen with three translations and two rotations, the vibration screen with three translations and one swing and plane reciprocating vibrating screen. The results of material screening test verified the feasibility of studying the dispersion of particle group by using the vibrating plate and the correctness of the results. The research results provided references for the analysis of screening performance of the vibration screen with different motion forms and the design and application of the new vibration screen.
