The article presents the results of laboratory studies a modernized threshing device combine harvester. change in design thresher was carried out order to parameters air flows gap between drum and concave deck. It is shown that introduced changes contribute better separation grain from straw grate separated material prevent reverse movement masses beaters.

The mechanical harvesting of corn has always been a problem for the development industry. In present investigation, tangential flow–transverse axial flow threshing test system was designed based on 4YL-4/5 harvester. structure design modular, and drum other key parts could be changed, or technical parameters adjusted according to needs. Thus, becomes suitable carry out various grains. this pape...

Some mechanical and process parameters of a developed millet thresher have been optimized using numerical optimization technique. The machine threshes panicles cleans the grains from straw. speed threshing number pegs attached to drum were investigated, while moisture content was parameter under investigation. Threshing efficiency, cleaning percentage losses used as performance characteristics ...

iran, with more than 90% of world production, is known as the main saffron producer. this plant is sterile and the saffron proliferation is possible only via cultivation of corms. one of the most problems in saffron cultivation is the yield reduction due to planting of small corms. in this research, a new saffron corm-grading machine is introduced. the machine includes a rotating drum, which is...

Combine harvesters are widely used worldwide in harvesting many crops, and they have functions that cover the entire process, such as cutting, threshing, separating, cleaning. The threshing drum is core working device of combine harvester plays an influential role rice efficiency, power requirement, seed loss. In this study, two structures threshers (conical-shaped cylindrical-shaped) were test...

In order to solve problems such as poor applicability of headers, weak separation ability threshing mechanisms and impurity-removal cleaning devices in the existing seed harvest methods Chinese milk vetch (Astragalus sinicus L.), a combined harvester was designed this paper. The parameters key components, flexible anti pod-dropping seedling-lifting header, longitudinal rod-teeth-type device air...

The distribution of the threshed mixture is link between threshing and cleaning process during corn harvesting. Uneven leads to a local accumulation in cleaning, resulting high impurity loss rate. Existing studies rarely concern mixture. To address this problem, experiment was conducted self-made longitudinal axial system explore pattern, both particle size weight components (corn kernel, cob, ...