STUDYING DESIGN AND TECHNOLOGICAL FACTORS INFLUENCE ON THE HAMMER ROTOR EFFICIENCY IN CRUSHING STEM MATERIALS BY THE GRAPHIC ANALYTICAL METHOD

Annotation
Taking into account the principles of theoretical mechanics and cutting theory, the
possibilities of increasing the hammer rotor efficiency have been investigated for various variants of
interaction between the working face of the hammer and the counter-cutting elements of a hopper
crusher of stem materials. It has been established that the material feeding to the rotor can be carried
out in radial, angular, and axial directions. The authors examine the operation scheme of a grinding
device with radial material feed to the rotor, carried out by a vertical rotating feed hopper. They
introduce the concept of hammer efficiency for various conditions of the working boundary hammer’s
position relative to the rotor’s radius, drawn at the suspension point. Graphical results of hammer
efficiency studies are presented.
Keywords: rotor, hammer, hopper, efficiency, stem material, graphs