Air-screen cleaning device for self-propelled longitudinal dual-axial millet combine harvester

Abstract

The invention discloses an air-screen cleaning device for a self-propelled longitudinal dual-axial millet combine harvester. The air-screen cleaning device consists of main operation functional parts including a step type shaking plate, a step punching type upper cleaning screen, a woven lower cleaning screen, a woven tail screen, a cross-flow fan, and a crank rocking arm drive mechanism. The air-screen cleaning device has grain cleaning operation functions such as a constant shaking, loosening, dispersing and uniform material conveying function, a rough fine two stage large area relative reciprocating shaking cleaning function, a fine crushed leaf and stem airflow blowing discharging function, a bilateral supporting balanced synchronous drive operation function, and a spikelet grain-contained residue collection and threshing function, can solve the technical problems that in a grain cleaning operation technical link, the conventional millet harvesters are low in cleaning trafficability, and are small in effect cleaning operation area; crushed straw and leaves are kinked and gathered to block a screen surface, cleaning material feeding is uneven, the trash content of grains is high, and carrying loss is huge. The air-screen cleaning device can meet the grain cleaning technical condition demand of mechanical harvesting of millet crops in different conditions.

Description

technical field [0001] This patent relates to a special component for agricultural machinery, in particular to a self-propelled longitudinal dual-axial flow millet combine harvester that is closely coordinated with a longitudinal dual-axial flow threshing and separation device and is used for mechanically harvesting millet crops for grain cleaning operations. Air sieve cleaning device. Background technique [0002] Millet crop originated in my country and has been cultivated on a large scale for more than 8,000 years. It was called millet or millet in ancient times. It has been an important food variety in my country since ancient times. , strong adaptability and so on. my country's northern provinces such as Hebei, Shandong, Shanxi, Shaanxi, Jilin, Liaoning, and Inner Mongolia have always been the main producing areas of millet crops. At present, the total annual output of millet crops has reached more than 2.8 million tons, accounting for about 80% of the world's total out...

AI Technical Summary

Problems solved by technology

In the process of mechanized harvesting of millet crops, it is very easy to have problems such as grain codes and even spikelets coming out as a whole, crushed straw leaves and grains twisted into agglomerates, grains are entrained and discharged by crushed straw leaves, and cleaning sieve surface is silted and blocked.

Images