Simulation study on screening performance of double-layer linear vibrating screen
In order to strengthen the screening performance of the double-layer linear vibrating screen for plas-tic particles,the discrete element method is used to establish the model of double layer linear vibrating screen and plastic particles,and the motion characteristics of plastic particles in screening are simulated.The effects of vibration frequency,vibration direction angle,amplitude,and screen surface inclination angle on the screening performance of the double-layer linear vibrating screen are analyzed using the single-factor control variable method and the four-factor four-level orthogonal test method.The results show that the movement of plastic particles on the screen surface can quickly reach the stable screening stage.The penetration screen of the two layers of the screen surface occurs near the inlet of the screen surface and the middle section of the screen front,respectively;with the increase of the vibration direction angle,the screening efficiency of the upper screen surface is basically stable at 92%,and the screening efficiency of the lower screen surface first decreases and then increases.With the increase in amplitude,the screening efficiency of both layers of the screen surface decreases.The increase in vibration frequency or inclination angle of the screen surface will lead to the increase and then decrease in the screening efficiency of the upper screen surface,and the decrease in the screening efficiency of the lower screen surface.The optimum parameter combination for screening plas-tic particles with the double-deck linear vibrating screen is a vibration frequency of 15 Hz,the vibration direc-tion angle of 40°,the amplitude of 5 mm,and the inclination angle of 4°.The research results provide a basis for improving the performance of the double-layer linear vibrating screen.
double-layer linear vibrating screenplastic particlesdiscrete element methodmotion character-isticsscreening efficiency
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