Analytical studies concerning the issues of heap supply for harvester-thresher cleaning, composition of tailings and the amount of grain are presented in the paper. The urgent problem of increasing the separation of air-sieve cleaning of modern combines is outlined. The schematic structure of the combine thresher is presented. The calculation of the grain mass quantity which is received for cleaning from the threshing group, the straw rack and finish threshing device is conducted. The visual image of cleaning load depending on supply is shown. According to the calculations it is possible to predict the loading of cleaning with small grain heaps depending on the total supply of grain mass to the thresher for combines of various classes. The technical solution to improve the cleaning system of a combine harvester is suggested and economically evaluated in the paper.

The paper is dedicated to the innovative analytical research in the field of pneumatic separation concerning the issues of grain heap feed for harvester-thresher cleaning, composition of tailings and the amount of grain. The problem of improving the separation of air-sieve cleaning of modern combines is of great current interest. The cleaning design with the use of pneumatic and inertia separator of small grain heaps for high-producing harvester-thresher is developed. The engineering study is conducted for the installation of the 8-bladed rotor above the chaffer sieve for experimental cleaning taking into account dimensional limitations and minimal alteration of the current air-sieve cleaning. The results of the study show the opportunity of better operation of the design of small grain heap cleaning with the application of pneumatic and inertia separator. The developed solutions make it possible to reduce grain losses and increase the harvester-thresher productivity level, as a result of which it is expected to achieve the economic effect assessed in the study.

The research of the topical issue related to the improvement of air-sieve cleaning separation of the modern high-producing combine harvester is presented in the article. The calculation of economic efficiency of equipping combines with the suggested pneumatic and inertia separator is conducted in the paper. Research presented indicates the estimated efficient functioning of the cleaning design for small grain heap which helps to reduce grain losses and leads to the increase of combine harvester productivity.

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Abstract:The article presents the cause analysis of backwardness in the Russian export market of educational services. It discusses the problems of foreign postgraduate training in Russian universities. The statistical data on the distribution of foreign postgraduate students in Russia and TSTU is provided according to the areas of training. The authors suggest basic ways of increasing the effectiveness of foreign postgraduate training.