Theoretical study of pneumatic separation of grain mixtures in vortex flow
В. Адамчук, Volodymyr Bulgakov, Semjons Ivanovs, Ivan Holovach, Yevhen Ihnatiev
Abstract
The article presents the results of the research on the justification of the pneumatic centrifugal method and design of the device for separation of grain mixtures in the grain-cleaning unit (module) of pneumatic centrifugal grain separators. The grounded initial requirements for the technological indicators and designkinematic parameters of such a device would provide the productivity of the unit up to 60 th -1 and the qualitative indicators on the primary purification of the wheat grain, which is the basis for a family of universal grain separators of new generation with productivity 50, 100 and 200 th -1 . For the developed design of the pneumatic centrifugal separator with the created vortex flow the equivalent scheme of interaction of the material particle of the grain mixture with the pneumatic vortex flow during its movement in the specified flow was made. The conditions of its motion and forces acting during this interaction were determined for the material particle. The components of its velocities during its motion in radial and vertical directions have also been determined. The necessary coordinate systems were introduced. To describe the motion of a material particle along a curvilinear trajectory the system of differential equations was composed. As a result of differential equations system solving the conditions of material particle distribution in three directions of motion depending on the physical and mechanical properties of the material particles have been determined. Constructed graphical dependences allowed to determine the design and kinematic parameters of the developed new design of the pneumatic centrifugal separator with vortex flow.