Combined longitudinal axial flow threshing and separating device and method and corn kernel harvester

Abstract

The invention discloses a combined longitudinal axial flow threshing and separating device and method and a corn kernel harvester. The combined longitudinal axial flow threshing and separating devicesolves the problems of insufficient threshing and difficult control of kernel breakage rate in the prior art, and has low kernel loss rate, long threshing time for ears, full threshing and low kernelbreakage rate. The technical scheme includes that the device comprises a rotary drum body, wherein a plurality of grain rod blocks and threshing nail teeth are uniformly distributed on the surface ofthe rotary drum body along a spiral line, the grain rod blocks are fixed to the front half section of the rotary drum body, and the threshing nail teeth are fixed to the rear half section of the rotary drum body; and a threshing concave plate is mounted below the rotary drum body, fruit clusters can be threshed under the combined action of the grain rod blocks and the threshing concave plate, andthe mixture formed after threshing can complete grain separation under the disturbance of the threshing nail teeth.

Description

technical field [0001] The invention relates to the field of agricultural machinery, in particular to a combined longitudinal axial flow threshing and separation device, method and corn grain harvester. Background technique [0002] Corn is the largest food crop in my country. The summer sown corn in China is mainly concentrated in the Huanghuaihai region, which is the most concentrated corn production area in my country. The sown area is about 160 million mu, accounting for more than 30% of the total corn area in the country. This area adopts the planting mode of two crops a year, and large-scale contiguous planting, which is relatively easy to realize mechanized combined harvesting operations. The harvest time of corn is generally in the middle and late September. The moisture content of corn kernels is generally above 35% when harvested. Direct threshing is easy to cause large fragmentation, resulting in a decline in corn quality, and mildew in the later stage will cause ...

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Problems solved by technology

[0004] (1) The horizontal axial flow threshing drum is limited by the structure of the original wheat harvester. The threshing drum is short and cannot fully thresh, and it mainly depends on the nail teeth to hit the threshing, and the grain breakage rate is difficult to control;

[0005] (2) The threshing elements of the longitudinal axial flow threshing drum are mostly nail teeth or flat tooth bars, and rubber sleeves are also installed on the nail teeth and flat tooth bars, but the rubber sleeves wear quickly and have no obvious effect on reducing the crushing rate. The threshing principle It is still the threshing element that hits the fruit ear completely, and the grain breakage rate is still difficult to control;

[0006] (3) The grid concave plate of the wheat harvester is mostly used for the separation concave plate, and the partitions between each grid will cause greater damage to the corn kernels, thereby increasing the grain breakage rate

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