360-degree grain separating double-layer flow guide cover

Abstract

The invention provides a 360-degree grain separating double-layer flow guide cover. The flow guide cover comprise an upper flow guide cover assembly and a lower flow guide cover assembly which are of a double-layer arc structure, wherein the radius of the double-layer arc structure is gradually reduced from the inlet end to the outlet end. The inner layers of the upper flow guide cover assembly and the lower flow guide cover assembly are punched separating flow guide cover bodies, the outer layers of the upper flow guide cover assembly and the lower flow guide cover assembly are closed flow guide cover bodies, and the arc face of each punched separating flow guide cover body is provided with multiple separating holes; the upper flow guide cover assembly and the lower flow guide cover assembly are detachably connected and form an annular cavity together; the upper flow guide cover assembly comprises a baffle, the upper closed cover body, the upper punched separating flow guide cover body, upper installing lugs and an upper circular ring plate, and the lower flow guide cover assembly comprises the lower closed cover body, the lower punched separating flow guide cover body, a lower circular ring plate, an outlet circular ring plate and lower installing lugs. The grain separating double-layer flow guide cover can increase the grain separating area, improve the separating capacity, and reduce entrainment loss and has high airflow conveying capacity in cooperation with a spiral feeding head.

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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