Kinematic characteristics analysis of differential dry separator sorting bed

YAO Da-suo1, REN Shang-jin2

(1.Department of Mechanical Engineering, Tianjin University Renai College,Tianjin 301636, China;
2.Tangshan Kaiyuan Coal Preparation Technology Co., Ltd., Tangshan 063009, China)

Abstract: Aiming at the difficulty in calculating the strength of components and adjusting the production parameters of differential dry separator, the kinematic characteristics of the sorting bed of differential dry separator was studied. The mechanical model and differential equation of motion of the separating bed were established by using the theory of mechanical dynamics. The influence of phase angle, angular frequency ratio and eccentric mass moment ratio on differential coefficient were studied by numerical simulation. The results show that the excitation force on the components of the dry separator is a composite harmonic law driven by two simple harmonic forces. When the initial phase angle of the exciter is 180 degrees, the ratio of angular frequency of high speed shaft to low speed shaft is 2, and the ratio of eccentric mass moment is about 1/4, the differential coefficient is the largest, which is most conducive to improving the sorting efficiency of the dry separator. The research results have certain guiding significance for the design of differential dry separator and the adjustment of production parameters.

Key words: differential dry separator; kinematic characteristics; differential coefficient; exciting force; numerical simulation