Specifics of operation of a lead-in of a grain harvester with an axial threshing and separation system

Modern agricultural machinery enterprises produce combine harvesters of various design solutions, including those with an axial threshing and separation design. The development, improvement and optimization of the parameters of the elements of rotary threshing and separating devices is a relevant technical task.

The aim is to study the working process in the lead-in of various grain harvesters with an axial threshing and separation system in order to identify the problems that arise during their operation and to establish methods for solving them.

The research conducted is based on a comprehensive analysis of the information available on the websites of both domestic and foreign manufacturers of self-propelled grain harvesters. In addition, the research involved studying data from various literature sources regarding changes in the physical and mechanical properties of agricultural plant stems during threshing and the results of assessing the condition of the receiving chambers during industrial operation in agricultural conditions.

The technological process of grain harvesters with an axial threshing and separation system of various manufacturers has been considered. The most loaded element has been identified, which is the intake chamber of the lead-in, as it receives the entire volume of the threshed mass with the maximum mechanical properties of the crop stems. When operating in production conditions, various manufacturers’ grain harvesters have shown through wear of the intake chamber due to the high load. The existing solutions for reducing wear have been found to be insufficiently effective. To reduce wear, it is proposed to optimize the technological process by changing the geometric shape of the receiving chamber.

The practical value of this research lies in identifying the wear of the receiving chamber during operation of grain harvesters with an axial threshing and separation system from various manufacturers in production conditions. The most promising approach to overcome this issue is to modify the technological process by optimizing the geometric shape.