Optimization of parameters of a two-drum combing harvester for harvesting oilseed flax
Abstract
The paper presents the results of experimental studies of substantiation of rational design and regime parameters of the harvester for harvesting oilseed flax by combing plants at the root. Processing of the results of mathematical modeling of the heap separation process in a combing type harvester with a curved shape of the casing taking into account the physical and mechanical properties of its components found that significant process factors are the following design parameters: speed of the reflector beater n1 the boundary L of the air grid of the casing and its width B.Experimental studies of the heap separation process in the harvester have established the dependences of the mass fraction of husk and stem particles from its area δh, the proportion of seeds and seed boxes δh and power P consumed on the speed of the reflector beater n1 and the combing drum n2, air position grid L and its width B. The most significant design and mode parameters of the combing type harvester for harvesting oilseed flax are highlighted: speed of rotation of the beater-reflector n1 = 892 rpm, frequency of rotation of the combing drum n2 = 652 rpm. , the position of the air grid L = 0,62 m and its width B = 0,56 m. The mass fraction of waste husk and stem particles is δh = 47,5%, the share of losses of seeds and boxes with seeds from the harvester, respectively, δh = 2,1%, and the power consumed to perform the process, P = 2,7 kW. Statistical analysis showed that the correlation coefficient between theoretical and experimental data is 0,88-0,95, the relative error of the optimal values is 4,6%. Visual and statistical comparison of theoretical and experimental data confirmed the adequacy of mathematical models developed as a result of theoretical research.
According to the results of experimental studies, it can be argued that their use for engineering calculations in the creation of new technical means for harvesting crops by combing plants at the root.
