Study on screening probability model and particle-size effect of flip-flow screen

Wang, Weinan; Lu, Jiawang; Wang, Chen; Yuan, Jiale; Hou, Xu; Pan, Miao; Hua, Jiang; Qiao, Jinpeng; Chen, Duan; Dombon, Enkhbat; Zhao, Yuemin

doi:10.1016/j.apt.2022.103668

Cited by 7 publications

(1 citation statement)

References 27 publications

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“…The ordinary vibrating screen has poor performance in screening wet fine coal materials. However, the vibrating flip-flow screen can effectively sieve wet fine coal materials [5][6][7]. When the vibrating flip-flow screen works, the floating and the main screen frame make the periodic relative motion.…”

Section: Introductionmentioning

confidence: 99%

Research on nonlinear dynamic characteristics of double-deck vibrating flip-flow screen

Liu

2023

Preprint

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The double-deck vibrating flip-flow screen is taken as the study case, and the dynamic equations, including cubic nonlinear stiffness, are established. The equation in the physical coordinates is transferred to the modal coordinates to study the nonlinear vibration characteristics of the system in resonance, which is analyzed by the multi-scale method. Then, the amplitude-frequency tuning parameter response equation is obtained. The influence of system parameters on the nonlinear system is discussed by solving the amplitude-frequency tuning parameter response equation. It is found that increasing the damping or reducing the harmonic force will suppress the system’s multiple solutions and vibration jumps. Numerical methods are adopted to verify the accuracy of the perturbed solution in both the frequency domain and time domain. Considering that the nonlinear stiffness has little influence in the slightly distant single-valued response resonance region, the displacement response of the double-deck vibrating flip-flow screen in the original physical coordinates system is obtained based on the superposition principle. The amplitude of the main screen frame is 7 mm, and the amplitude of the upper and lower floating frame is 9.4 mm and 5.6 mm, respectively. The phase between the main screen frame and the upper and lower floating frame is 180°, which realizes the stretching and slackening of the deck. This paper guides the design of double-deck vibrating flip-flow screens.

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Section: Introductionmentioning

confidence: 99%