Abstract
This article presents studies on the definition and influence of mechanical characteristics of icy root crops, as well as the design parameters of the working parts of the chopper on the chopping process. 244When chopping icy root crops, rolling, jamming and crushing between the working parts are observed, as well as increased energy intensity of the product chopping process. The study of the mechanical characteristics of icy root crops was carried out for a design solution for choosing the working parts of the chopper. According to the results of the studies, the tensile strength is 3-4 MPa, depending on the type of icy root crop, which exceeds the strength of root crops when laying for storage by 1.5-1.8 times. The cutting force of icy root crops exceeded 4 kN / m, which is 2 times more than under normal cutting conditions. To reduce the magnitude of the cutting force of icy root crops, the effect of a flat knife and a rotary knife with a counter-cut with different sharpening angles were studied separately. Analysis of the research results allowed to choose the design of the working bodies in the form of a rotary knife with a counter-cutter for crushing icy root crops by the type of double-support cutting. Analysis of the design parameters allowed to determine the optimal sharpening angle of the knife and counter-cutter at 300, at which the efforts to penetrate the surface of the icy frame and cut the hard-viscous layer of icy root crops will be minimal