A 360° grain separation double-layer shroud

Abstract

The present invention provides a 360° grain separation double-layer shroud, which includes an upper shroud assembly and a lower shroud assembly, both of which are double-layer arc-shaped structures , and the radius gradually decreases from the inlet end to the outlet end; the inner layer of the upper shroud assembly and the lower shroud assembly is a punched separation shroud, and the outer layer is a closed shroud, and the punched separation shroud A plurality of separation holes are opened on the arc surface of the cover; the upper shroud assembly and the lower shroud assembly are detachably connected and jointly form an annular cavity; the upper shroud assembly includes a baffle plate, a closed upper shroud, The punching separates the upper cover, the upper mounting ear, and the upper ring plate; the lower shroud assembly includes, closes the lower cover, punches and separates the lower cover, the lower ring plate, the outlet ring plate, and the lower mounting ear. The grain separation double-layer guide cover of the present invention can increase the grain separation area, improve the separation ability, reduce the entrainment loss, and can also cooperate with the screw feeding head to form a strong air flow conveying ability.

Description

technical field [0001] The invention belongs to the field of separation hoods, in particular to a 360-degree grain separation double-layer hood. 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. In the existing cutting and longitudinal flow full-feeding combine harvester threshing device, the joint between the front cutting flow drum and the rear longitudinal axial flow drum is a smooth round platform shroud, or a punching shroud. The shroud cooperates with the vertical axis screw feeding head. Generally, the axial length of the shroud is 15%-20% of the length of the longitudinal axial flow drum, which occupies a large area and wastes a large grain separation area. For example, the patent CN202773468U a...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiency that the traditional shroud and the transition guide plate in the prior art cannot have both the increased grain separation area and the strong airflow conveying effect, the present invention provides a 360° grain separation double-layer shroud to increase the grain separation area , Improve separation ability, reduce entrainment loss, and at the same time, it can also cooperate with the screw feeding head to form a strong airflow conveying ability

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