GRAIN HARVESTING TECHNOLOGIES WITH ENERGY AND RESOURCE SAVING MULTIFUNCTIONAL UNITS

Abstract

The research was carried out with the aim of improving the technology of harvesting cereal crops for the production of competitive products. The work was carried out in 2018-2022 in Krasnodar region. We optimized the parameters of multifunctional units and tested them in relation to harvesting conditions in Kuban. Comparison of machines, complexes, technologies and systems was carried out using a comprehensive assessment method using the Harrington function. The proposed technology with multifunctional units, compared to the basic one, allows reducing labor costs by 1.25 times, operating costs and metal consumption by 1.2 times, and increasing labor productivity by almost 2 times. When analyzing the dependence of the cost of grain yield losses on the duration of harvesting, direct biological yield losses and indirect losses associated with injury to grain by the working parts of harvesting machines were taken into account. A multifunctional unit is proposed, designed for harvesting grain crops with simultaneous pressing of straw. It is based on the use of the serial power unit “Polesie” UES-2-280A, the mounted grain harvester KZR-10 and the straw baler PRP-1.6. A production test has proven the advantage of a rotary threshing apparatus compared to a classic one. The use of combine harvesters with rotary threshing and separating devices reduces grain crushing, compared to threshing machines, by 10 times, microdamage to grain - by 6...8%. Using the three-factor experiment planning method, the optimal duration for harvesting grain crops using the proposed technology with a multifunctional unit was established, which, with a grain yield of 6.8 t/ha, is 5 working days, the working width of the combine header is 5.4 m. Using the proposed unit with one of the trailed machines (straw baler, direct seed seeder, discor or other tillage machine) is quite effective.