360-degree axial flow threshing separation system

Abstract

The invention relates to a 360-degree axial flow threshing separation system which is used for 360-degree axial flow threshing separation of a combined harvester. The 360-degree axial flow threshing separation system comprises an axial flow threshing cylinder, a concave plate sieve, a top cover and a frame, and the top cover is of a double-layer structure and comprises a closed upper cover located on the outside and a porous flow guide sleeve located on the inside. A 360-degree separation system is formed by the porous flow guide sleeve above the axial flow threshing cylinder and the concave plate sieve below the axial flow threshing cylinder, and a plurality of separation holes are arranged on an arc cylindrical surface of the porous flow guide sleeve. A plurality of guide stripes are installed on one side of the arc cylindrical surface of the porous flow guide sleeve facing to the cylinder to control residence time and axial movement speed of grains in the threshing separation system. A separation area of the 360-degree axial flow threshing separation system increases by almost one time under the condition that a total size of a threshing separation device is unchanged, clamping loss of grains is reduced, threshing performance is improved, length of the threshing cylinder is shortened, size of a threshing device is reduced, and the 360-degree axial flow threshing separation system is simple in structure, low in cost and convenient to install.

Description

technical field [0001] The invention relates to a threshing and separating device for a harvesting machine, which can realize 360° high-efficiency separation of grains of various crops such as rice, wheat, rapeseed and soybean. Background technique [0002] The threshing and separating device is one of the core working parts of the combine harvester, which determines the performance of the whole machine. The traditional threshing device mainly includes a threshing drum, a concave screen and a top cover. When the combine harvester is working, the crops are fed into the threshing device through the conveying trough, and under the high-speed impact of the threshing drum, they rub and collide with the concave screen to achieve threshing. At the same time, they make an approximate spiral motion along the concave screen and the top cover. The detached grains are separated from the sieve holes of the concave plate and enter the subsequent cleaning, and a large number of intact sta...

AI Technical Summary

Problems solved by technology

With these and traditional threshing devices, the grain can only be separated from the concave plate sieve holes, so the separation ability is limited, and the separation area of ​​the threshing device cannot be significantly increased without changing the geometric size of the threshing device, and the work performance can be improved.

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