differential velocity stirring kneader

FAN Zhi-min，SHI Wen，ZHENG Xian-zhe，WANG Na

（College of Electromechanical Engineering，QingdaoUniversity of Science and Technology，Qingdao 266061，China）

Abstract：Aiming at solving the mixing uniformity problem of the pulverized coal mixture in the preparation process of coal activatedcarbon，the screw arris of the differential velocity stirring kneader was redesigned to meet the need for mixing the specific materialsaccording to the material properties. Because of the great influence on the mixing quality and effect by spiral angel，two factors influencing the spiral angel，the frictional angle between materials and the screw arris and the shear angle inside materials were analyzed，and the reasonable value range of the spiral angle was obtained. For the spiral angel within its reasonable value range，the maximum stress value of the dangerous nodes of the screw arris under the spiral angels of different screw arrises was analyzed through ANSYS，and the influence rule of the spiral angle on the maximum stress value was summarized. The results indicate that under the condition of meeting the reasonable domain of definition and the shear force inside materials，the maximum stress value of the dangerous nodes of the screw arris is minimum when the value range of the spiral angel is 70°＜β＜75° . When the spiral angle is within this value range，the material mixing quality of the screw arris is higher，the service life of the screw arris is longer，and the work of the differential velocity

stirring kneader is more reliable.

Key words：stirring kneader；screw arris；spiral angel