Abstract
The harvesting straw feed crops (silage corn, alfalfa, herbaceous mulberry, etc.) was tedious, high-labor-cost, and large-nutrient-loss. A self-propelled straw forage crop harvester, which could realize the integration of cutting, flattening and modulating, chopping, and throwing straw forage crops, was designed. The cutting angle could freely be adjusted between 0° and 8°. The max rotation speed of the flattening roller could reach 590 r/min and could be adjusted consecutively by the hydraulic control device. To verify the performance of this machine, several harvesting experiments of alfalfa, silage corn, and herbaceous mulberry with different moisture, were carried out on this machine. During the experiment, the average working speed of the machine was 1.6 m/s, the cutting height was 40–80 mm, and the flattening rate was 97.14%. It is determined that the suitable cutting speed for harvesting alfalfa is 2131 r/min; the suitable cutting speed for harvesting silage corn is 836 r/min; the suitable cutting speed for harvesting herb mulberry is 1045 r/min. The design of the machine can not only improve labor productivity and reduce the nutrient loss of forage crop but also support the silage harvesting machinery and equipment for forage crop.
Highlights
With the continuous advancement of the ‘‘grain-tofeed’’ policy and the dairy industry policy, our demand for milk, meat, and eggs has been increasing
Straw forage crops were an indispensable source of feed for animal husbandry
The silage harvesters produced by these companies are rich in types and gradually develop toward high power, wide range, and high efficiency.[3,4,5,6,7]
Summary
With the continuous advancement of the ‘‘grain-tofeed’’ policy and the dairy industry policy, our demand for milk, meat, and eggs has been increasing. The silage harvesters produced by these companies are rich in types and gradually develop toward high power, wide range, and high efficiency.[3,4,5,6,7] these harvesters have a single work and cannot harvest multiple silage crops They are suitable for large farms and cannot be used for a small field. Wu and Wang[15,16] China Agricultural University, researched alfalfa mowing and flattening harvester, which can adapt to changes in terrain and better perform harvesting operations These grass cutters are characterized by flexible steering and strong climbing ability, filling the gap of forage harvesting machinery in mountainous areas
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