TO SPECIFICATION OF THE FORCE OF A VIBRATORY ROLLER ON THE SOIL

As a result of the analysis of tillage rollers, it was revealed that the main design feature is to ensure the required specific pressure on the soil, consequently, it is necessary to increase the roller mass per 1 m of the working width, whereas it leads to metal consumption increase of the tool. Based on the obtained data, we developed a fundamentally new design of the vibratory roller, its application will ensure the fulfillment of agrotechnical requirements for soil density with a minimum metal consumption of 70 kg/m. High-quality tillage with a vibratory roller is ensured by a passive drive of unbalancers installed on the axis of a hollow cylinder. To determine the center of mass of the unbalancers, the KOMPAS 3D v 20 program was used, which allows to obtain the desired result with an accuracy of 0.000001 mm. It was revealed in the course of the theoretical study that the unbalancers create vibrations with an amplitude of 0.00008 ... 0.0011 m at a rotation frequency of 800 min-1 due to their displacement in relation to the axis of the vibratory roller. Also, it was revealed that when the unbalancers are displaced in relation to the roller axis, the position of their center of gravity changes by approximately the same value. Concurrently, the specific pressure of the vibratory roller on the soil changes from 732.81 N/m to 1275.28 N/m, increasing by 74% in case of displacement of the unbalancers in relation to the axis of the vibratory roller up to the maximum value of a = 20 mm. Field studies of the proposed roller showed that the quality of soil compaction by the proposed vibratory roller with improved parameters and modes of operation is better than that of the most common rollers, namely, ZKVG-1.4 and ZKKSH-6.