Authors

Abstract

To better analyze the distribution law of airflow in the wind sieve type cleaning device, this study took the cleaning device of Yafeng 4YZL-6S corn seed harvester as an example and conducted numerical simulation and comparative analysis of the airflow field inside the cleaning device under the sieve plate opening scales of 12, 16 and 20 mm using CFD software. The numerical simulation showed that the distribution of airflow velocity above the sieve surface was uniform at a sieve plate opening scale of 16 mm. Airflow velocity measurements were performed on the test prototype using an anemometer to verify the accuracy of the numerical simulation results. The simulation test results were supplemented by field trials, which showed that when the speed of the cleaning fan was 1200 r/min and the sieve plate opening scale was 16 mm, the impurity rate in the field harvest of the operating machinery was 1.03% and the loss rate was 1.91%. The operating effect met the standard of mechanized corn grain harvesting. This paper can provide a reference for the design and working mechanism research of corn seed harvester cleaning devices.

Abstract in Chinese

为了更好地分析风筛式清选装置中气流的分布规律，本研究以亚丰4YZL-6S玉米籽粒收获机清选装置为例，运用CFD软件对筛片开度分别为12、16和20 mm的清选装置内部气流场进行了数值模拟和对比分析。数值模拟结果表明：当筛片开度为16 mm时，筛面上方气流速度分布均匀。使用风速仪在试验样机上进行了气流速度测量，验证了数值模拟结果的准确性。通过田间试验对模拟试验结果进行了补充，田间试验结果表明：当清选风机转速为1200r/min，筛片开度为16 mm时，作业机具田间收获的含杂率为1.03%、损失率1.91%，作业效果符合玉米籽粒机械化收获标准。本文可为玉米籽粒收获机清选装置设计和工作机理研究提供参考。