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Collaborative optimization of screening efficiency and screen surface load-PartⅠ:Modeling and evaluation

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Particuology 2022年第10期20卷 77-87页

作者： Xuhui Xia Weimin Jing Zelin Zhang Lei Wang Huan Zhang Key Laboratory of Metallurgical Equipment and Control Technology Wuhan University of Science and TechnologyWuhan 430081China

The screen surface load(SSL)caused by granular materials is an important factor affecting the structural performance of vibrating *** on virtual experiment,a multi-objective collaborative optimiza-tion method is proposed to control the SSL under high screening efficiency(SE)in this ***,a DEM model was established to study the influence of process parameters on SE and ***,the NSGA-Ⅱ(Non-dominated Sorting Genetic Algorithm)was employed to optimize the screening parameters with both SE and SSL as *** optimization method proves to be effective implementing on a linear vibrating *** SE equals to 98.5%,the SSL optimizable range is 39.2%.While compromising the SE to 88.7%,the SSL optimizable range improves to 48.6%.The result shows that the collaborative optimization could effectively control the SSL while maintaining a high SE,which is of great significance to improve the service life of screen surface and screen body.

关键词： Vibrating screen Discrete element method screening efficiency Screen surface load Collaborative optimization

Modeling screening efficiency with vibrational parameters based on DEM 3D simulation

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维普期刊数据库

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Mining Science and Technology 2010年第4期20卷 615-620页

作者： CHEN Yanhua TONG Xin School of Mechanical Engineering and Automation Huaqiao UniversityQuanzhou 362021China

The efficiency of particle screening was studied over a range of vibrational parameters including amplitude, frequency and vibrational direction. The Discrete Element Method (DEM) was used to simulate the screening process. A functional relationship between efficiency and the parameters, both singly and combined, is established. The function is a complicated exponential. Optimal amplitude and frequency values are smaller for particles near the mesh and larger for other particles. The optimum vibration angle is 45° for nearly all kinds of particles. A transverse velocity, V⊥, was defined and V⊥=0.2 m/s was identified to be the most efficient operating point by both simulation and experimental observation. Comparison of these results with those reported by others is included.

关键词： modeling screening efficiency discrete element method simulations

Application of the DEM to screening process:a 3D simulation

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Mining Science and Technology 2009年第4期19卷 493-497页

作者： CHEN Yan-hua TONG Xin School of Mechanical Engineering and Automation Huaqiao University Quanzhou Fujian 362021 China

The discrete element method(DEM) has been widely used to simulate microscopic interactions between *** is a deeply complicated process when considering the law of motion for the particles,*** this paper,a numerical model for the study of a particle screening process using the DEM is *** attention was paid to the modeling of a vibrating screen that allows particles to pass through,or to rebound,when approaching the screen *** concerning screen length and vibrating frequency as they relate to screening efficiency were *** conclusions were:three-dimensional simulation of screening efficiency along the screen length follows an exponential distribution;when the sieve vibrates over a certain frequency range the screening efficiency is stable;and,higher vibration frequencies can improve the handling capacity of the screening machine.

关键词： discrete element method screening efficiency digital simulation

Trispectrum and correlation dimension analysis of magnetorheological damper in vibration screen

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Journal of Central South University 2012年第7期19卷 1832-1838页

作者：吴福森黄宜坚黄凯徐姗 College of Mechanical Engineering and Automation Huaqiao University

In order to improve the screening efficiency of vibrating screen and make vibration process smooth,a new type of magnetorheological (MR) damper was proposed. The signals of displacement in the vibration process during the test were collected. The trispectrum model of autoregressive (AR) time series was built and the correlation dimension was used to quantify the fractal characteristics during the vibration process. The result shows that,in different working conditions,trispectrum slices are applied to obtaining the information of non-Gaussian,nonlinear amplitude?frequency characteristics of the signal. Besides,there is correlation between the correlation dimension of vibration signal and trispectrum slices,which is very important to select the optimum working parameters of the MR damper and vibrating screen. And in the experimental conditions,it is found that when the working current of MR damper is 2 A and the rotation speed of vibration motor is 800 r/min,the vibration screen reaches its maximum screening efficiency.

关键词： screening efficiency vibration screen magnetorheological (MR) damper autoregressive (AR) time series trispectrumslices correlation dimension