| The powder quantitative packaging machine is simple, do not need weighing device and, with high filling efficiency, the application has been used widespread.The screw play an important role in powder quantitative packaging machine. The main principle is that it can control the filling material weight by controlling the lap or rotating time. Based on the basic physics of powder materials properties. Firstly, use the mathematical method to descript the powder particles blanking process ,determine the trajectory equation of the single particle materials and analyses powder particles velocity in three directions ,that is xyz velocity and acceleration of change. Studied the movement of powder particles between the stress of powder particles and the screw geometry parameter relation.Secondly, analysis and calculate the volume of the Archimedes screw Archimedes screw axial profile is a whole trapezoidal profile trapezoid, will be divided into two triangles and a rectangular, using integral method respectively and ask out their volume, and then adding them, the whole screw palpitation's volume will be get.Thirdly, analysis the theory of power and actual power, getting auger filling efficiency of expression. In order to get a higher auger filling efficiency, need consider the relationship between the screw speed the screw geometric parameters. Through the Analysis the spiral rising angles and screw speed by MATLAB software, getting the relationship between the good filling efficiency and spiral rising angles range.Finally, introducing the computational fluid dynamics software FLUENT, using FLUENT simulation software for auger filling process of powder particles, observing the whole filling process of the powder.
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