Bulgarian Journal of Agricultural Science
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Investigation of the furrow formation by the disc tillage tools
Valentina Kushnir, Gayaz Gaifullin, Serik Nurushev, Ruslan Kravchenko, Maxat Amantayev
Abstract: Tillage operation is one of the most power consuming processes in agriculture. Disc tillage tools due to their numerous advantages are of great importance in agriculture all over the world. In order to minimize the power requirements for the tillage process, it is developed the disc tillage tool by dividing the plain cutting surface into separate elements and turning them at an angle to the plane of rotation. This type of designing provides a condition for the soil sliding on the working surface. However, their furrow formation process differs from the known tillage tools. Hence, the purpose of this research is to improve the work
quality, namely smoothness of the furrow bottom, weed destroying, due to the optimization of the furrow formation process based on the modeling of the soil-separate cutting elements of the tillage disc interaction. Mathematical models for determining the parameters of the furrows formed by three types of the disc tillage tools, namely with a plain concave and conical ring working surfaces, with separate cutting blades, mounted obliquely to the plane of rotation were presented. Experiments were carried out with the model of disc with the separate cutting blades under controlled conditions in the soil bin, fi lled with sand.
The disc angle was 20°, 30°, 40° and the kinematic coeffi cient (ratio of peripheral disc speed to forward speed) was 1.0, 1.33, 1.8 and 2.2. Cutting blades inclined to the plane of rotation form short furrows with the elliptic section, inclined to the travel direction at an angle of 35-90° depending on the disc angle and the kinematical coefficient.
Keywords: cutting blade; direction of furrow; disc tillage tool; furrow; width and length of furrow
Date published: 2018-08-30
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