Stepped type cross flow cutting multi-roller threshing separating and cleaning device

Abstract

The invention relates to a stepped type cross flow cutting multi-roller threshing separating and cleaning device. The device comprises a threshing separating system and a cleaning system. The threshing separating system comprises a flow cutting roller, two transversally-arranged axial flow rollers, concave plate sieves, top covers, a straw crushing device and transition plates among the concave plate sieves, wherein the concave plate sieves and the top covers correspond to the three threshing rollers. The cleaning system comprises a sliding plate, a shaking plate, a vibrating screen, a fan, a grain conveying auger and a residue auger. The axes of the three rollers are not on the same horizontal plane and are in a stepped type, materials threshed from a front threshing chamber can be thrown to a rear threshing chamber along the tangent line conveniently, the transition position between the threshing chambers is not prone to being blocked, the bottoms of the three concave plate sieves are on the same line, an included angle is formed between each concave plate sieve and the horizontal line, and therefore it is guaranteed that the distances from the shaking plate additionally arranged on the cleaning device to the concave plate sieves are the same; a second cross shaft flow roller on one side of a straw outlet is shorter than a first cross shaft flow roller on one side of the straw outlet, the straw outlet is deviated to the middle, and accordingly it is guaranteed that straw discharged from the straw crushing device cannot be thrown to crops which are not harvested and can be uniformly thrown and scattered in the full area. The device can meet the harvest requirement for a large feed quantity of the crops, is high in harvest efficiency and threshing separating capacity, little in cleaning and screening loss and high in cleaning and screening efficiency.

Description

technical field [0001] The invention relates to the technical field of manufacturing crop mechanical threshing and separation devices and cleaning devices, in particular to a stepped cross-flow multi-drum threshing-separation-cleaning device, which can be widely used in harvesting rice, wheat, rape, barley and beans High-performance harvesting for classes, etc. Background technique [0002] In recent years, with the continuous expansion of rice planting area, the increase of yield and the popularization of high-yield rice, it is required that the combine harvester should develop in the direction of high efficiency, high power and large feeding volume under the premise of ensuring good performance, so as to improve productivity. At present, there are threshing and separating devices with cross-axial flow or combination of tangential flow and cross-axial flow in the market. The most common single drum has a single horizontal axial flow drum threshing and separation device, and...

AI Technical Summary

Problems solved by technology

At present, there are threshing and separating devices with cross-axial flow or combination of tangential flow and cross-axial flow in the market. The most common single drum has a single horizontal axial flow drum threshing and separation device, and the double drum has a tangential flow drum and a single horizontal shaft. The threshing and separating device combined with flow drum and the threshing and separating device combined with horizontal double-axial flow drum, the processing capacity of these three threshing and separating devices is limited, especially when harvesting rice with green stalks and lush leaves, it is prone to blockage and cannot meet the requirements. Large feeding volume, efficient harvesting requirements

In the existing double-drum and three-drum threshing and separating devices, the axes of the drums are all on the same horizontal line. When the material transitions from the previous threshing chamber to the rear threshing chamber, the material cannot be thrown tangentially, which is likely to cause unevenness at the transition. smooth or even clogged

In recent years, the government has requested to ban the burning of straw, and the disposal of straw has become a thorny issue for farmers. Therefore, many farmers require that the straw be crushed directly when the crops are harvested together, so as to facilitate the later return to the field. For the drum threshing and separating device, because the grass outlet is located on the side of the machine, it is close to the unharvested crops on both sides of the vehicle's driving direction, and the grass coming out of the grass breaking device is easily thrown onto the unharvested crops, reducing the harvesting efficiency. , the grass outlet is not in the middle of the machine, the grass coming out of the grass breaking device cannot be scattered evenly, which is not conducive to the subsequent return to the field

On the other hand, in the case of a large amount of feed, the quality of the prolapse is relatively large, and the existing cleaning device cannot meet the harvesting requirements of a large feed amount. If the prolapse directly falls on the vibrating screen, it will make the vibrating screen Uneven loading of materials will increase the cleaning load of the vibrating screen and make the cleaning effect worse

Furthermore, the axes of the existing drums are all on the same horizontal line, and the distance from the concave screen to the inclined shaking plate is not equal, which will cause the materials falling from the concave screen to accumulate on the shaking plate or make the materials on the shaking plate uneven

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