Results of experimental investigations of a flexible active harrow with loosening teeth
¹National University of Life and Environmental Sciences of Ukraine, Heroiv Obrony 15, UA03041 Kyiv, Ukraine
²Vinnytsia National Agrarian University, Soniachna street 3, UA21008 Vinnytsia, Ukraine
³Latvia University of Life Sciences and Technologies, Liela street 2, LV-3001 Jelgava, Latvia
⁴Lutsk National Technical University, Lvivska street 75, UA43018 Lutsk, Volyn region, Ukraine
Soil tillage processes significantly affect the growth of cultivated plants; therefore, improvement of various designs and combinations of ploughs is still an actual practical and scientific task. This paper presents investigations of the design of a soil tillage machine consisting of three plough bodies equipped from the lateral side with a module with a flexible active harrow driven by a support wheel. The technological process of tillage by this machine is carried out in such a way that the module of the flexible active harrow is installed at a certain depth of soil tillage. The purpose of this work is an experimental comparative investigation of the quality indicators of the work of a design of the soil tillage working body with a flexible active harrow having loosening teeth. In the process of comparative experimental investigations of the operation of ploughs with a standard flexible harrow and an experimental active harrow having loosening teeth, the soil lumpiness (characterising the quality of crumbling) and water permeability of the obtained soil structure were estimated. An experimental model of this working tool was tested under the production conditions, and it showed advantages of loosening and crumpling the soil compared to the conventional harrows. This can be explained by the fact that the harrow tines, freely mounted on the axes of its links, ensure their oscillatory movements when moving in two different planes, thereby creating conditions for more intense soil disintegration.