油莎豆联合收获机合页筛片式升运装置设计与试验

针对油莎豆机械化收获过程中升运振动装置除杂效果不明显，导致油莎豆与土壤杂质等分离不彻底，漏土率较低，伤果率较高的问题，以及在升运输送过程中存在土壤堵塞、回带等问题，结合油莎豆果-土-秧团聚体特性，设计了一种合页筛片式升运装置，通过筛片折弯部分增大筛孔面积，对团聚体提供与链筛运动方向相同的推力，使合页式升运装置提高漏土效率且有效避免了回带现象。对其倾角和固定位置进行了分析和设计，运用EDEM进行仿真试验，以油莎豆链筛线速度、链筛板折弯高度、链筛振动频率为试验因素，以油莎豆团聚体漏土率和伤果率为试验指标，通过三因素三水平正交仿真试验，最终得到输送筛片最佳结构参数组合为：链筛线速度1.151m/s、折弯高度27.779mm、振频9.561Hz，此时升运装置漏土率为96.524%、伤果率为2.439%。田间验证试验结果表明:当链筛线速度为1.2m/s、折弯高度为28mm、振频为9.5Hz时，合页式升运装置平均漏土率为96.05%，平均伤果率为2.38%，与仿真试验所测结果基本一致，满足油莎豆升运链筛工作要求。

Design and Experiment of Hinge Lifting Device of Cyperus esculentus Combine Harvester

Aiming at the oil bean mechanized harvesting process of lifting and transporting vibration device to remove impurities is not obvious, resulting in the oil bean and soil impurities and other separation is not complete, the soil leakage rate is low, the rate of injury to the fruit is high, as well as the soil clogging and back to the belt in the process of lifting and transporting and so on, combined with the oil bean fruit-soil-seedling agglomerates, a hinge sieve sheet lifting device was designed through the sieve sheet bending part of the agglomerate to provide the same direction of movement with the chain sieve to increase the area of the screen holes and increase the effect of soil leakage and effectively avoid the phenomenon of back to the belt. Through the bending part of the sieve plate to provide the agglomerates with the same thrust as the chain sieve movement direction, the sieve area was increased, so that the hinge-type lifting device can increase the effect of soil leakage and effectively avoid the phenomenon of back to the belt. The inclination angle and fixed position were analyzed and designed, and the simulation test was carried out by EDEM. Taking the linear speed of the chain sieve, the bending height of the chain sieve plate, and the vibration frequency of the chain sieve as the test factors, and the soil leakage rate and the fruit injury rate of the oleaginous soybean agglomerates in the conveying process as the test indexes, the optimal structural parameter combinations of the conveying sieve were obtained through the analysis of three-factor and three-level orthogonal simulation test. The test results showed that the optimal combination of chain sieve line speed was 1.151m/s, bending height was 27.779mm, and vibration frequency was 9.561Hz, at this time, the soil leakage rate of the lifting device was 96.524%, and the fruit injury rate was 2.439%. The results of the field verification test showed that the average soil leakage rate of the hinge-type lifting device was 96.05% and the average fruit injury rate was 2.38% when taking the chain sieve linear speed of 1.2m/s, bending height of 28mm, and vibration frequency of 9.5Hz, which was basically the same as the results of the simulation test, and it met the working requirements of the chain sieve for lifting and transporting the oil soybeans.