Design Improvement and Computer Modeling of the Finger Grain Crusher

Crushing of grain and grain materials is widespread and one of the most responsible and energy-intensive processes in the technological lines of modern enterprises. Analyzing the designs of the most common hammer, crushers enabled the determination of the most promising grain crushing scheme, which is its preliminary separation with the subsequent crushing of a separate fraction in different parts of the rotor. We described the method and device for crushing grain material by the method of direct impact of the metal fingers of the rotor, which have a vertical axis of rotation with the preliminary use of grain separation. Computer modeling of the grain crushing process in the developed crusher was carried out with the help of ANSYS and SolidWorks software complexes to establish optimal ratios of the design parameters of the crusher. As a result of the modeling, the fields of speed distribution and the lines of movement of grain particles along the internal volume of the chopper have been obtained, which in turn makes it possible to conclude about a small range of speed distribution at the place of crushing and a smaller number of circulation movements, about other types of hammer crushers. The results of computer modeling correlate well with experimental studies of the grain grinding module, the value of which is 1.4–2.2 mm, fully meeting modern technological requirements.