The object of research is the conveyor, which is the mechanism of the header for two–phase harvesting by batch method. The aim of the research is to develop the design and technological process ofthe roll portion header, the most suitable for the conditions of arid climate with the justification ofits main operating parameters. In the conditions of the steppe zone of the southern Urals, a separatemethod of harvesting grain crops is more preferable. The analysis of the structures windrowers allowed todevelop a portion of the header. The technological process as a portion of the header includes two phases — mowing and subsequent accumulation of the grain mass on the conveyor, and then upload. The unloaded portions are joined with the stacked in the previous passage – this is how the roll strip is formed. This option of laying the roll can reduce the number of passes in the selection of about 4–5 times in comparison with the basic technology. This allows you to reduce the cost of selection and reduce the impact of heavy machinery on the soil. A special role in the work of the header plays a conveyor. It is established that the thickness of the layer of stems on the Reaper conveyor depends on theworking length of the conveyor and the speed of movement of the unit on the field, the density and diameter of the stalk, the density of laying on the conveyor.

The article considers the issue of substantiating the distributing working body parameters for a pneumatic grain seeder. Work on the subject matter is mainly experimental in nature and not sufficiently deeply worked out theoretically. Based on computer simulation, the article determines the most preferred layout of the distributor dividing head, establishes a rational form of the reference cone and the location of the outlet pipes. Based on the simulation of the movement of seed grain particles, the individual design parameters of the distributor dividing head are specified. The results of experimental studies are presented confirming the theoretical background.

The article considers the issue that further improvement of the grain combine design with the classical threshing-separating device is possible due to the development of its technological scheme based on the principle of modular construction and stationary process of threshing grain mass. To achieve this goal, the problems were solved, by which laws were revealed and a mathematical description of the technological process of the combine harvester was given, as well as patterns characterizing the effect of straw on the process of grain mass threshing were revealed. In the course of research and evaluation of the effectiveness of the combine harvester’s usage the basic laws characterizing the technological process of combine harvester with the classical threshing-separating device are established. The change of the working speed of the combine depends on the technological properties of grain crops. It is revealed that the coefficient of solomitol grain mass δс is possible to reduce during combining grain crops through the application of high-cut stems. It was found that with the increase in the height of the cut of the stems (wheat) from 0.10 to 0.20 m, the coefficient of straw content of the grain mass decreases from 0.726 to 0.578. The additional material of experimental studies to determine the coefficient of straw content of the grain mass δc depending on the diameter and length of the pinned part of the stem is presented. When harvesting grain crops by the method of combing, a grain-bearing mass is formed, which is characterized by a random ratio of the fractions of the straw of the stalk of the annular part. The chaotic structure of plant parts temosolomida mass poses new challenges to supply it in the threshing-machine combine harvester with a classic threshingseparating device.

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The article discusses the methods of harvesting grain crops. The emphasis is placed on a separate method involving the use of roller harvesters. A variant of a roller harvester operating by batch technology is considered. The standard methodology of substantiation of optimal parameters and modes of operation of the harvester conveyor is analyzed. As a result, it was found that such a technique is not suitable for establishing the appropriate indicators of the conveyor of the batch header due to its technical and technological features. A particular technique for determining the optimal modes and parameters of the conveyor of a batch harvester is proposed and justified, taking into account its design and technological features and the possibility of minimizing grain losses, and in conclusion the results of its application are presented.