Journal of South China University of Technology(Natural Science) >

2023 , Vol. 51 >Issue 1: 41 - 50

DOI: https://doi.org/10.12141/j.issn.1000-565X.220104

Mechanical Engineering

Dynamic Characteristics Analysis of Vibrating Screen Based on System and Particle Coupling Dynamics

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  • 1.School of Construction Machinery，Chang’an University，Xi’an 710064，Shaanxi，China
    2.CRRC Times Electric Vehicle Co. ，Ltd. ，Zhuzhou 412007，Hunan，China
贺朝霞（1978-），女，博士，副教授，主要从事工程机械系统动力学、颗粒动力学与虚拟样机技术研究。

Received date: 2022-03-06

  Online published: 2022-10-09

Supported by

the National Natural Science Foundation of China(51605040);the Shaanxi Natural Science Foundation of China(2021JM-166)

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Abstract

In order to analyze the interaction between the vibration of vibrating screen and the movement of particles and reveal the influence of vibration parameters on the dynamic characteristics of the system, this paper establishes a model for the coupling of vibration sieve system dynamics and particle dynamics. By using this model, real-time bi-directional coupling simulation of screening process can be realized, and the accuracy of the simulation model is effectively improved. The steady-state particle distribution at each layer of screen is obtained based on the actual screening yield which is calculated in terms of screen test. As compared with the uncoupled model, the model considering the coupling of vibrating screen and particle dynamics can obtain more accurate force analysis, and enhance the material throwing of the sieve body, avoiding the particle accumulation of each layer in the traditional simulation, which is more consistent with the actual screening situation. Meanwhile, the coupling analysis also indicates that the maximum impact force of materials does not decrease as the number of screen layers decreases. Finally, the variation law of material impact force with the main parameters of vibrating screen is studied. The results indicate that the impact force of the particles not only varies as the proportion of screen surface area, but also relies on the residence time of the particles on the screen; the impact force of the particles decreases with the increase of the inclination angle of screen surface. When the vibration direction angle is within 57°to 90°, the magnitude of the impact force shows an inverted V-shape. The results provide a theoretical guidance for the dynamic optimization design and noise reduction of vibration screen.

Key words： construction machinery; dynamic characteristic; coupling simulation; vibrating screen; particle dynamics

Cite this article

HE Zhaoxia, WANG Xingzhe, XING Zengfei, et al . Dynamic Characteristics Analysis of Vibrating Screen Based on System and Particle Coupling Dynamics[J]. Journal of South China University of Technology(Natural Science), 2023 , 51(1) : 41 -50 . DOI: 10.12141/j.issn.1000-565X.220104

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