关键词: 饲用苎麻, 麻类作物, 青饲料, 联合收获机, 割台

Abstract: When the existing forage harvester harvested forage ramie crops,  the cutting head had problems that the conveying was not smooth,  and the auger was easy to be entangled by the fiber. In order to solve the problems,  a special harvester header was designed. The header consisted of a reciprocating cutting device,  a reel,  a stalk pickup conveyor,  and a screw auger. According to the field growth characteristics and material characteristics of forage ramie,  the design of the harvester header was carried out. Through theoretical calculation and experimental analysis,  the structural parameters of each key device of the header were determined. The diameter of the reel was 840 mm,  the distance between the cutter with the reel shaft was 1 470 mm,  the speed of the reel was 27.9 r/min,  the lifting stroke was 700 mm,  the rotating speed of the cutter crank was 540 r/min,  the radius of the pulley of the stalk pickup conveyor was 150 mm,  the rotating speed was 152.80 r/min.  The diameter of the feeding auger was 320 mm,  and the rotating speed was 170 r/min. Field tests showed that the harvesting loss rate of this machine was 3%,  the standard grass length rate was 91%,  the working hour productivity was 0.25-0.35 hm2/h,  and the cutting height was 150 mm. During harvesting,  there was no material blocking and fiber entanglement in the header. After harvesting,  the ramie stubble was neatly cut,  and no obvious tearing at the base of the crop stalk was found. The test results showed that the cutting effect of the reciprocating cutter was good,  and the working performance of the whole machine was stable. The harvester header can meet the harvesting requirements of forage ramie crops.

Key words: feeding ramie, bast fiber crops, green fodder, combine harvester, header