Substantiation of structural and technological parameters of the reeling drum

Abstract

The solution of the problem of increasing the efficiency of grain harvesting technology, in particular, with the use of stripping harvester in the process of direct harvesting, involves the construction of a scheme of technological process and the calculation of rational design parameters that determine the qualitative implementation of the process of harvesting plants at the root.The article presents the results of theoretical studies of the substantiation of the design and technological parameters of the stripping rotor of the harvester for the harvesting of oilseed flax, taking into account the physical and mechanical properties of the plant stem, which determine their behavior under the influence of mechanical forces that arise during interaction with the working elements of the stripping device.The technological process of harvesting oilseed flax, which is carried out by combines, must take into account data on yields, physical and mechanical properties of plants (stems and seeds), requirements for the final product as for the form and quality and productivity of the stated process. During harvesting, the plants undergo various mechanical stresses (stretching, compression, bending, shifts, etc.) that need to be taken into account when modeling the process. The behavior of plants during the process of harvesting is the result of the combination of the elasticplastic properties of the material, the properties of the granular material and the non-Newtonian characteristics of the fluid flow. Such behavior involving complex interactions and nonlinear relationships complicates the application or adaptation of known theories of homogeneous materials, as well as the development of reliable theories. Thus, the mathematical modeling of these properties for further use in simulation of optimization and control processes is a complex process. As a result of theoretical studies of the interaction of an oil flax plant with a header combing a drum based on the theory of vibrations, a dynamic function was obtained to change the stem curvature depending on its rheological properties and the drum design parameters were established, namely, radii R _out = 0,28 m, R_in = 0,22 m, coordinates of the center y_c = 0,28 m and x_c = 0,52 m and the number of combing j = 8. pcs. Appropriate conclusions have been made regarding the results of theoretical studies.