Agro Cross-Country Ability of Combine Harvesters with Driving Wheels Equipped with Different Tires

Introduction. An important area of agricultural industry development is improving the operating efficiency of wheeled mobile agricultural machinery. The real situation analyzing has shown the presence of a number of difficulties associated with many factors including high agricultural machine weight, which, along with increased performance, leads to the over-compaction of all soil layers that results in reduced yields of cultivated crops and increased energy consumption during subsequent processing. Despite the significant successes of domestic and foreign researchers and research teams in this area, these difficulties impede the development of an optimal solution to the problem. Therefore, the relevance of the materials presented in the work is beyond doubt.Aim of the Study. The study is aimed at assessing of agro cross-country ability of the fifthgeneration domestic combine harvesters when harvesting winter wheat.Materials and Methods. In the study of the agro cross-country ability of combine harvesters, there was applied an experimental method using the measuring complex “tire tester” and other control and measuring devices. As the test objects there were used the propelling devices of the combines on the tires of the models F-136, F-179, F-81E, F-81DP and by the company “Cood year” of the same standard size 30.5-32.Results. There were determined the indicators of agro cross-country ability of fifth-generation combine harvesters with the wheel propelling devices equipped with the tires of different models. Using standard methods for determining the maximum pressures on soil and normal stress at a depth of 50 cm, it has been found that these combines do not meet the requirements of GOST R 58655-2019 at any options of completion of driving wheels with tires (except for the installation of experimental tires when soil moisture is not more than 0.5 NV). Direct measurement of the indicators of agro cross-country ability of combine harvesters has shown that judging by the figures of the maximum pressures when driving wheels are in contact with soil and stress caused at a depth of 0.5 m, the fifth generation combine harvester in harvesting spike cereals in the conditions of the Southern Federal District meets the requirements of GOST R 58655-2019 on all compared tire.Discussion and Conclusion. Identifying agro cross-country ability indicators through direct measuring has shown that it is possible to use modern domestic combine harvesters equipped with radial tires (with optimal reinforcement of the inner structure) and experimental diagonal-parallel tires for harvesting spike cereals. The results of the study should be taken into account when equipping of the fifth generation combine harvesters with tires.