A review on the advanced design techniques and methods of vibrating screen for coal preparation

Impact of screening coals on screen surface and multi-index optimization for coal cleaning production

In the present work, an innovative design strategy for the optimization of the dynamic performances and the structural loads of heavy loaded vibrating screens is presented. A dynamic model of a vibrating screen for the selection of inert materials in an asphalt plant is proposed, and a numerical optimization procedure is applied to selected design parameters and geometrical features. The algorithm provides a tool to improve the dynamic behavior of vibrating screens of different geometric and inertial properties. The results are analyzed, in order to find the parameters apt to minimize the pitching angle of the examined screen during stationary working conditions, thus providing a better material selection by reducing gravel throwback. A numerical FEM model analysis and an experimental strain-gage campaign have been conducted on a realization of the vibrating screen, testing two optimized and un-optimized configurations, to verify the FEM model results. The complete work gives the machine designer a powerful tool, validated by means of full scale experimental tests, to optimize the dynamic behavior of the screen and to verify its fatigue resistance.

A dynamic optimization theoretical method for heavy loaded vibrating screens

Innovative structural solution for heavy loaded vibrating screens

A new concept of banana vibrating screen which has the same effect as traditional banana vibrating screen in a new way was put forward. The dynamic model of vibrating screen was established and its working principle was analyzed when the action line of the exciting force did not act through the centroid of screen box. Moreover, the dynamic differential equations of centroid and screen surface were obtained. The motions of centroid and screen surface were simulated with actual parameters of the design example in Matlab/Simulink. The results show that not only the amplitude has a significant decrease from 9.38 to 4.10 mm, but also the throwing index and vibrating direction angle have a significant decrease from 10.49 to 4.59, and from 58.10° to 33.29°, respectively, along the screen surface, which indicates that motion characteristics of vibrating screen are consistent with those of traditional banana vibrating screen only by means of a single angle of screen surface. What’s more, such banana vibrating screen of variable linear trajectory with greater processing capacity could be obtained by adjusting the relative position of force center and the centroid of screen box properly.

Dynamic analysis and simulation of four-axis forced synchronizing banana vibrating screen of variable linear trajectory

https://cyberleninka.org/article/n/973135.pdf

He Xiao-mei

Papers

Dynamic design theory and application of large vibrating screen