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Jan Radosław Kaminski, Maciej Kuboń, Evgenij Ivanovič Mazugin and Sergej Grigorevič Rubee

Abstract

The object of the research is a technological process and technical means of cutting woody shrubs at melioration objects. The subject of the research consists of regularities and methods of execution of the process of cutting woody shrubs at melioration objects by a multirotor mower with trapezoidal knives. The aim of the research is to increase efficiency of cutting shrubs at melioration objects by applying a multi-rotor mower with trapezoidal knives. We have obtained analy tical dependences in order to determine the angle of diversion of a knife from the radial position during contact with the stem, and to calculate the reaction in the joint “knife-fixing bolt” depending on the parameters of a knife and rotor, and the distance from the centre of the knife fixing bolt to the point of contact of a knife and stem, which provides minimal impact load on the knife fixing bolt during cutting woody shrubs. We have also developed a mathematical model of the process of cutting shrubs by a multi-rotor mover with trapezoidal knives, and methods of determination of the main parameters and regimes of work of the mower cutting apparatus for cutting shrubs at melioration objects, which contain a monogram, based on the use of theoretical-experimental dependences.

Open access

Aleksandr Viktorovich Klochkov, Vladimir Vladimirovich Gusarov, Maciej Kuboń and Jan Radosław Kamiński

Abstract

The objective of the paper was intensification of the process of threshing and grain separation by a rasp-bar threshing mechanism of a combine harvester with a differentiate concave; substantiation of a regular-style design and differentiate concave parameters as well as threshing and separating mechanism operation modes. Theoretical research has been conducted based on laws of motion, experimental investigation – in accordance with methods devised on the basis of conventional methodologies. Standard computing methods as well as Microsoft Excel and Mathcad application packages have been used for processing experimental data. Measuring and recording equipment has been used in the research process. Experimental investigation has been carried out on specially devised experimental assemblies. The research has enabled: to substantiate the design-manufacturing process of the threshing and separating mechanism with a differentiate concave; to establish analytical dependencies to determine the area of typical influence zones of a threshing drum and concave on threshing mass; to ascertain the regularity of stem deformation under the influence of different forces regulated by changing the distance between concave transverse slats; to figure out the regression equation enabling finding optimal process variables for a threshing and separating mechanism with a differentiate concave. The scientific novelty of the engineering solutions is confirmed by a patent of the Republic of Belarus for the utility model № 6335 « Tresking mechanism». The results of theoretical and experimental research have been used in developing design documentation for the production of a differentiate concave for combine harvesters PA «Gomselmash».

Open access

Radosław Wąsik and Krzysztof Michalec

meteorytu. Acta Societatis Metheoriticae Polonorum, 5 , 97-103. Strykowski, W. (red). (2012). Czy drewno jest surowcem strategicznym ? W: Strykowski W., Gałecka, A., Pawłowska, J. Drewno – surowiec strategiczny? Ośrodek Rozwojowo-Wdrożeniowy Lasów Państwowych w Bedoniu. Wąsik, R. (2007a). Zmienność wybranych cech makrostruktury i gęstości drewna daglezji zielonej (Pseudotsuga menziesii var. viridis Franco) na terenie Polski. Drewno – Wood. 178 (50), 57-85. Wąsik, R. (2007b). Variability of the share of heartwood on the stem cross-section of the

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Sławomir Francik, Zbigniew Ślipek, Jarosław Frączek and Adrian Knapczyk

., de Cartagena, F.R., Puig-Bargues, J. (2013a). Artificial neural networks vs. Gene Expression Programming for estimating outlet dissolved oxygen in micro-irrigation sand filters fed with effluents. Computers and Electronics in Agriculture, 99, 176-185. Marti, P., Gasque, M., Gonzalez-Altozano, P. (2013b). An artificial neural network approach to the estimation of stem water potential from frequency domain reflectometry soil moisture measurements and meteorological data. Computers and Electronics in Agriculture, 91, 75-86. Mohammadi, K