Characteristics and efficiency of a new vibrating screen with a swing trace

• A new swing vibration screen with two-cam mechanism was proposed.
• Effects of vibration parameters on screening efficiency were analyzed via DEM simulations.
• Swing vibration mode was compared with linear vibration mode.

A new vibration type and motion characteristics were proposed according to the principle of manual sieving. A mechanical model of the new motion was established and the characteristics of the new vibrating screen were analyzed to establish its equation of motion by using the vibration theory, to include as technological parameters, amplitude, movement velocity, and throwing index through theoretical calculation. The efficiency of particle screening was studied at different values of frequency and swing declination angle. The discrete element method (DEM) was used to simulate the screening with the swing trace. The functional relationship between screening efficiency and the parameters was fitted with the least square method. The results show that high frequency and large swing angle are suitable for small particles, while small values are suitable for particles close to the aperture size. Compared to the linear vibration trace, both screening efficiency and processing capacity were effectively improved.

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