Research On DEM Simulation Of Spin Vibration Screening Process

As an important production processes in the industrial sectors, screening operation plays a decisive role in grading, dehydration, and other important tasks. With the wide application of vibrating screen, people pay more attention to aided design and analysis of computer equipment. This article will focus on the advanced spin vibration screening, using discrete element method to analyze the material motions, then simulate the vibrating process by EDEM, aim to determine the main impact factors of efficiency by analyzing of material motion rules. At last provide the theory basis in order to set the vibration parameters reasonably.In the analytical process, taking the efficiency as an assessment indicator of the vibration results. The following step is to select the eccentric block angle, material layer and vibration frequency as the important factors affect the efficiency. During the process of simulation, establishing the boundary contact judgment methods of particle to particle, particle to screen based on the principle of DEM and Hertz contact theory.Moreover, getting deep understanding of the particle motion by analyzed the data that base on EDEM simulation. Meanwhile, using BP neural network to train the function relationship between technical parameters and screen efficiency, and optimal the screening process in order to gain the optimum efficiency.Finally, designing a practical spin vibration screen experiment in order to verify the correctness of analysis and calculating the screen efficiency. Via the comparison of experiment and simulation, we can verify if the screen efficiency of simulation is correct, and verify the performance of BP network to meet the requirements, and then verify if the optimized technical parameters is also correct.