基于阵列化振动单元的枸杞采收机设计与试验

    Design and test of a Chinese wolfberry harvester using arrayed vibration units

    • 摘要: 针对国内枸杞采收装备存在采收质量差、效率低的问题,该研究提出基于篱架型枸杞双侧挂果种植农艺的阵列化振动单元采收方式。对阵列化振动部件和接果归集平台进行结构设计,并进行行走、输送、分选和整机稳定性分析,确定振动部件结构、频率和角度参数,宁夏枸杞夏果不同茬数的阵列布局参数,履带总成设计参数,横-纵输送带传动结构和驱动参数,接果筐与提升输送带位置和杂物分选风速参数,并完成整机在坡度上行驶稳定性校验。根据整机行走、采收和分选试验条件与方法,开展整机性能试验,结果显示:整机最高行驶速度0.252 m/s,最小转弯半径1.86 m,适应最大坡度32°,最大越沟宽0.5 m,最大越阶高度11 cm,整机行走性能良好;针对宁夏宁杞1号夏果第6茬枸杞采收,振幅固定为15 mm,最佳作业条件为驱动转速1300 r/min,振动时间5 s,成熟枸杞采摘效率4037 颗/min,成熟枸杞采净率88.95%,鲜果损伤率3.64%,干果损伤率4.17%,未成熟果、青果和花朵综合误采率3.80%,机采人采效率比26.91,机械化采收枸杞果实满足商品化加工的要求;确定风速至少5 m/s,利于果叶分离。

       

      Abstract: Harvesting equipment is closely related to the harvesting quality and efficiency, particularly for the Chinese wolfberry. In this study, a method of arrayed vibration unit was proposed in the mechanized harvesting equipment, according to the agronomy of hedgerow type Chinese wolfberry bilateral fruit hanging planting. The structural design of the arrayed vibration components and the fruit receiving platform was carried out, and then the walking, conveying, sorting and stability analysis of the whole machine were carried out. The arrayed layout parameters of different stubble numbers of Chinese wolfberry Xia Guo in Ningxia were measured. A series of significant paramerers were conducted to determine the vibration unit structure, vibration frequency, vibration angle, the crawler assembly, the transmission structure and driving of horizontal and vertical conveyor belts, the position of fruit receiving basket and lifting conveyor belt and the wind speed of debris sorting. Furthermore, the driving stability of the whole machine was verified on the slope. After that, the performance tests of the whole machine were carried out to evaluate the feasibility and efficiency of the mechanism, according to the test conditions and walking, harvesting and sorting. The selected indicators and the results showed that the maximum running speed of the whole chassis in all conditions was up to 0.252 m/s, the minimum turning radius was limited in 1.86 m, the maximum slope was 32°, the maximum crossing ditch width was no more than 0.5 m, and the maximum crossing step height was 11 cm. All the indicators were verified for the better walking performance, compared with the traditional. The harvesting object was taken as the sixth crop of Chinese wolfberry in Xiaguo, Ningxia Ningqi No.1. The amplitude was fixed at 15 mm. The optimum operating conditions were as follows: the driving speed was 1 300 r/min, vibration time was 5 s, the picking efficiency of mature Chinese wolfberry was 4 037 fruits per minute, the net picking rate of mature Chinese wolfberry was 88.95%, the damage rate of mature Chinese wolfberry was 3.64%, the damage rate of dried mature Chinese wolfberry was 4.17%, the comprehensive false picking rate of immature fruits, olives and flowers was 3.80%, and the efficiency ratio of mechanical picking to human picking was 26.91. All the performance indicators were presented that the Chinese wolfberry fruit of mechanized picking was fully met the requirements of its commercial processing. In addition, the wind speed was determined to be at least 5 m/s, which was beneficial to the separation of fruits and leaves.

       

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