A cutting and longitudinal flow drum butt joint negative pressure airflow feeding device

Abstract

The invention provides a tangential and longitudinal axial flow roller butt-joint negative pressure airflow feeding device which comprises a tangential flow threshing separation device, a conical spiral feeding device, a conical flow guide cover assembly and a longitudinal axial flow threshing separation device. An area for containing a tangential roller is defined by a tangential flow concave grid assembly and a tangential flow top cover in the tangential flow threshing separation device. The two ends of a concave grid plate in the tangential flow concave grid assembly are each coaxially connected with a fixing arc plate. A feeding flat plate and two supporting arc plates connected with the two ends of the feeding flat plate are welded to the inlet of the concave grid plate along the tangent line. An arc punching cross connecting plate connected with the rear end of the concave grid plate is welded between the two fixing arc plates, is of a concave structure and is provided with a plurality of through holes. A concave grid baffle is welded to the joint between the arc punching cross connecting plate and a lower flow guide cover. The problem that tangential and longitudinal axial flow threshing separation device is prone to blockage at the large- feeding-amount position is avoided, and tangential flow and longitudinal axial flow mechanical conveying and airflow conveying performance is better exploited.

Description

technical field [0001] The invention belongs to the field of drum threshing for a combine harvester and the butt joint of a tangential flow and an axial flow drum, and in particular relates to a negative pressure airflow feeding device for butt jointing of a tangential flow drum. Background technique [0002] With the improvement of crop yield, the requirements for threshing and separation performance, operating efficiency and reliability of combine harvesters are getting higher and higher, and it is necessary to develop in the direction of high efficiency, high performance and large feeding amount. Cutting and longitudinal flow combine harvester is an orderly and efficient threshing device that organically combines cutting flow threshing and longitudinal axial flow threshing. It has the advantages of long threshing time, good threshing performance, and good adaptability to wet and difficult crops. There is still a lot of room for optimization in the feeding performance of t...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies in the prior art, the present invention provides a butt joint negative pressure airflow feeding device for cutting and longitudinal flow drums, so as to avoid the problem that the cutting and longitudinal flow threshing separation device is prone to blockage at the transition point under large feeding volume, so that the cutting and cutting Flow and longitudinal axial flow mechanical conveying and air conveying performance are the best

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