RESILIENT PROPERTIES OF THE CORRUGATED BRISTLE OF CURVILINEAR PROFILE
Cleaning of root crops for animal nutrition is one of the most labor intensive operations. We develop a corrugated cleaner for dry cleaning of fodder root crops for individual use on farms or in technological lines. To determine the basic parameters of the cleaner: angular rotational speed of corrugated drums, angle of slope of corrugated cleaner to horizon, the gradient of side drums, the drums diameter and length, and the cleaner output, it is necessary, first of all, to reveal the analytical relation between the geometrical parameters of curvilinear bristle and its resilient properties, and to define the coefficients characterizing the resilient properties of the curvilinear corrugated bristle. The individual tools of brush drums of the cleaner are corrugated curvilinear strips of triangular profile made of fosta nylon or rubber. When penetrating the rubs on roots surface, the triangular corrugations of the strips create a wedging effect that assist better tare removal and root contour following, increasing root cleaning action. The geometry of a curvilinear bristle determines its different radial and circumferential rigidity: in radial direction an individual element renders lesser bending and stretching resistance than in circumferential direction. The resilience coefficients of the material of curvilinear bristle may be defined by the construction of equivalent charts of deformation of the corrugated and flat strips and equating of the rigidity of the strips identically singled-out. The found coefficients characterize the resilient properties of the material and curvilinear bristle structure depending on the profile geometry, bristle thickness and width.