Research Of Vertical Shaft Impact Crusher Rotor's Throwing Properties And Structure Designing

Vertical shaft Impact crusher is widely used in the stone production. At present, vertical shaft impact crusher is divided into several types by different rotor structure on market, each type of rotor is matched different speeds, different materials to meet the different demand for throwing and crushing materials, which is the rotor design key technology of concern. Therefore, research of vertical shaft impact crusher rotor's throwing properties and structure designing with discrete element techniques was great significant not only to optimize the function of the rotor structure and operating parameters but also to enrich rotor theory.In this paper, the rotor prototype is Sandvik RP109 vertical shaft impact crusher, it is three-dimensional solid modeled by Solidwoks and imported into the discrete element analysis software EDEM, and the vertical shaft impact crusher system virtual prototype model is formed to simulate the particle size behavior. In the virtual prototype model, the particles flow field is analyzed; the movement, trajectory distribution and throwing properties of particles within the rotor are researched. The average speed of particles thrown off the rotor as a Investigation target, the laws between the speedup particles and the channels numbers of rotor are discussed by the rotor with 3~8 channels. The results show, with the increase in the channel number, the rotor acceleration effect on the particle gradually increased at first and reached peak at 6, and then begin to decline. Therefore, when the channel number of rotor is 6, there are the most reasonable structure and the best particle acceleration.The particle dynamics analysis shows the absolute velocity of the particle was the highest when the channel board mounting angle was 46.5°. Computer simulation based on EDEM also shows that the different channel board mounting angle has different effects on the velocity of the rotor ejecting materials. Under the condition of same other parameters, the absolute velocity of rotor ejecting particles increased with the installation angle rising and reached the peak at 46.5°, and then begin to decline.The multi-parameter synthesis relationship and process optimization between the speed of particles thrown off rotor and the number of flow channels, the flow plate mounting angel, rotor speed, feeding amount are researched by orthogonal test technology, the factors influencing the speed of particles thrown are discovered, the first is the channels number of rotor, the second is the flow plate mounting angle, the third is the rotor speed, and the fourth is the feeding amount. The optimal solution is the channel number of 6, the flow plate mounting angle of 46.5°, rotor speed at 1600r/min, the feeding amount of 400t/h.