Single-longitudinal axial flow rigid-flexible coupling corn threshing device

Abstract

The invention discloses a single-longitudinal axial flow rigid-flexible coupling corn threshing device. The corn threshing device comprises a device frame, a columnar threshing roller, a rigid-flexible coupling threshing unit and a hollow cylindrical concave grid, wherein the two ends of the columnar threshing roller are rotatably supported on the device frame, the rigid-flexible coupling threshing unit is spirally arranged around the circumferential edge of the front section of the threshing roller, the hollow cylindrical concave grid is coaxially arranged outside the threshing roller in a sleeving mode and comprises a plurality of supporting strips arrayed at intervals and extending in the form of spiral lines, first baffles fixed to the two sides of the supporting strips and concave grid threshing strips with the lower ends embedded in a containing space. Threshing is realized through the rigid-flexible coupling effect, the corn kernel breakage rate is further reduced, and the threshing performance is improved by increasing the threshing intensity.

Description

technical field [0001] The invention relates to an agricultural machine, in particular to a single longitudinal axial flow rigid-flexible coupling corn threshing device. Background technique [0002] The corn threshing device with direct grain harvesting is the development direction of corn mechanized harvesting in the future. However, in most areas of my country, the moisture content of corn is high during harvesting, and there are higher requirements for the corn threshing device with direct grain harvesting. The vertical axial flow corn threshing device is named because the axial direction of the threshing drum of the threshing device is the same as the walking direction of the harvester. It is more widely used because of its higher threshing efficiency than the horizontal axial flow threshing device. [0003] The axial-flow threshing device is composed of a threshing drum and a concave plate sieve. The threshing elements of the existing threshing drum are mostly in the f...

AI Technical Summary

Problems solved by technology

Corn ears move passively in the threshing gap formed by the threshing drum and the concave plate sieve. Under the action of the threshing element of the threshing drum, they move in a circular spiral along the axis of the drum, and are threshed by the impact and friction of the threshing element and the concave plate sieve. However, the threshing element and the concave screen exert a line contact or point contact force on the corn ear, which has a strong impact force and rubbing strength on the kernel, especially when threshing corn with high moisture content, it is more likely to cause a large number of corn kernels. Damage Therefore, there is an urgent need for a corn threshing device suitable for high moisture content, low grain breakage rate, and high efficiency.

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