Intensification of the Grain sEparation Process on a Flat Oscillating Sieve with a Zigzag Arrangement of Holes
Ihor Bazhan, Oleksii Vasylkovskyi, Serhii Leshchenko, Volodymyr Amosov · National Interagency Scientific and Technical Collection of Works Design Production and Exploitation of Agricultural Machines · 2024
Increasing the quantitative and qualitative performance of agricultural machinery is a pressing task for scientists conducting research in the field of agricultural engineering. This article is devoted to the analysis of methods and means of intensification of intralayer processes occurring in grain material during sieve separation in order to increase the efficiency of grain cleaning by size on flat-screen vibrating machines. A review of technical solutions that ensure increased efficiency of sieve cleaning of grain materials on flat-screen vibrating separators was conducted. Analysis of technical solutions allowed to identify the physical bases of the appearance of the effect of increasing the indicators of technological efficiency of sieve processing of grain. It was established that an increase in separation efficiency can be achieved only by intensifying the processes of mutual movement (segregation) of particles inside the layer of material in the vertical and horizontal planes. It was assumed that the most effective is the activation of intralayer processes in the processed material, which is provided in two ways – by establishing the optimal kinematic mode of oscillations and the structural parameters of the sieve itself. A new, patented technical solution is presented – a sieve with a zigzag arrangement of holes and the main tasks and elements of the methodology of previous studies are formed. Conclusions. Increasing the efficiency of the flat-screen vibrating working bodies can be achieved only by intensifying the intralayer processes in the processed material. Activating the intralayer processes is achieved in two main ways – by establishing optimal modes and by using structural activators, and their directions of action mostly do not coincide. The use of the regime activation method intensifies the processes mostly in the vertical plane, contributing to the segregation of particles, while the use of structural elements allows improving the conditions in the horizontal plane (in the plane of the sieve). At the same time, the use of additional devices complicates the design. The most organic way to intensify intralayer processes in the processed material is to use flat sieves with a zigzag arrangement of oblong holes, which activate their interaction with particles of the grain mixture in the longitudinal and transverse directions and to match the structural parameters of the sieve with the operating parameters of the oscillations.