Methods of Increasing the Wear Resistance of the Working Bodies of a Rotary-Vortex Mill

Abstract

The article is aimed at increasing the durability of the working bodies of rotary-vortex mills, which are widely used in the production of dry building mixes. The description of the device of a rotary-vortex mill is given.
 The article proposes a new method developed by scientists of the V.G. Shukhov BSTU to increase the durability of the mill's working bodies by applying cells with dimensions on their surfaces that allow particles of the crushed material to be pressed into them, and thereby protect the surface from rapid wear. 
 As a result of an analytical study of the force interaction of the crushed material with the surface of the beale cell, an equation was obtained to determine the geometric dimensions of the cell, allowing due to friction forces to keep the volume of particles of the pressed material from falling out of it. 
 It is established that the dimensions of the cell are interconnected and are determined in such a way that the resulting pushing force is equal to or less than the holding force (friction force). It is proved that the pressing of particles of the crushed material, in rectangular cells of the deposited mesh on the working surface of the bat, is largely determined by the geometric dimensions of the cell, and also depends on the physical and mechanical characteristics of the crushed materials. The design of the bill is proposed, which allows to increase its durability by reducing the contact area of the crushed material with the working surface of the bill.