Combined threshing and separating device and harvester

Abstract

The invention provides a combined type threshing and separating device. The combined type threshing and separating device is characterized in that a pre-threshing and separating mechanism is used for threshing and separating materials; a re-threshing and separating mechanism is used for re-threshing and separating residual materials; an auxiliary mechanism comprises a first auxiliary roller and a second auxiliary roller, the first auxiliary roller is used for accelerating feeding and tearing of the materials and assisting the materials to enter the pre-threshing and separating mechanism, the second auxiliary roller is located between the pre-threshing and separating mechanism and the re-threshing and separating mechanism, and the second auxiliary roller is used for uniformly thinning the residual materials output from the pre-threshing and separating mechanism and quickly feeding the residual materials from the upper part of the re-threshing and separating mechanism. Through the assistance of the first auxiliary roller and the second auxiliary roller, not only can the materials with large feeding quantity be quickly threshed, but also crops with wet and dense green stalks and high water content can be harvested with low loss and high efficiency. The whole process is soft and orderly, the grain breakage rate can be reduced, the entrainment loss is avoided, and the integrity of straw is kept.

Description

technical field [0001] The invention belongs to the technical field of agricultural harvesting machinery, and in particular relates to a combined threshing and separating device and a harvester. Background technique [0002] The existing harvester mainly adopts two kinds of threshing separation devices of horizontal axial flow and vertical axial flow. The horizontal axial flow threshing separation device has a simple and compact structure and good threshing performance. However, when the feed rate is increased, problems such as incomplete separation, increased entrainment loss, and uneven distribution of materials on the cleaning screen surface often occur. Compared with the horizontal axial flow threshing and separation device, the longitudinal axial flow drum separation and separation device has greatly improved crop threshing and separation capacity, harvesting efficiency and performance, but when the crops are wet, problems such as feeding blockage and serious stalk brea...

AI Technical Summary

Problems solved by technology

The horizontal axial flow threshing separation device has a simple and compact structure and good threshing performance. However, when the feed rate is increased, problems such as incomplete separation, increased entrainment loss, and uneven distribution of materials on the cleaning screen surface often occur.

Compared with the horizontal axial flow threshing and separation device, the vertical axial flow drum separation and separation device has greatly improved crop threshing and separation capacity, harvesting efficiency and performance. However, when the crops are wet, there are often problems such as feeding blockage and severe stalk breakage.

In the prior art, the combined threshing and separation device of the transverse tangential flow drum and the vertical dual-axial flow drum has a high performance in terms of broken rate, loss rate and other performance indicators when harvesting crops with wet green stems, dense, high moisture content and high yield. still needs to be perfected

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