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您的检索式：作者名="Dinghao Feng"
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| 1 | Optimized design of the pneumatic precision seed-metering device for carrots显示文摘The small size, light weight, irregular shape, and impurities that characterize seed groups increase clogging tendencies in the traditional seed-metering device thereby making it difficult to achieve high-speed precision seeding. A pneumatic seed-metering device with good seed-filling performance for carrot was designed in this study. By analyzing the movement state of seeds in the device under the theoretical condition, it was concluded that the minimum critical negative pressure value of air chamber was 0.32 kPa, which provided a theoretical basis for simulation and testing. ANSYS 17.0 Software was used to simulate the shape of the seeding plate hole. By comparing the pressure, air flow stability between the suction surface and the plug removal surface of the convection field, it was concluded that the conical hole was optimal. A bench verification test was conducted on the device. The average qualified rate, missing rate, and replaying rate were 81.48%, 4.07%, and 14.45%, respectively, which provided a strong reference for the design of carrot precision seed-metering device. | Dinghao Feng Xinping Sun Hua Li Xindan Qi Yongjian Wang Samuel Mbugua Nyambura | 2023 | International Journal of Agricultural and Biological Engineering2023，16，6： | 0 |
| 2 | Optimization of a three-row air-suction Brassica chinensis precision metering device based on CFD-DEM coupling simulation显示文摘This study aimed to optimize a three-row air-suction Brassica chinensis precision metering device to improve the low seeding performance.ANSYS 17.0 Software was used to analyze the effect of different numbers of suction holes and different suction hole structures on the airflow field.It was found that a suction hole number of 60 was beneficial to the flow field stability and a conical hole structure was beneficial to the adsorption of seeds.Box-Behnken design experiments were carried out with negative pressure,rotational speed,and hole diameter as the experimental factors.The optimal parameter combination was achieved when the negative pressure was 3.96 kPa,the rotational speed of the seeding plate was 1.49 rad/s and the hole diameter was 1.10 mm.The qualification rate of inner,middle,and outer rings were 87.580%,90.548%,and 90.117%,respectively,and the miss seeding rate of inner,middle,and outer rings were 10.915%,7.139%,and 5.920%,respectively. | Xinping Sun Hua Li Xindan Qi Dinghao Feng Jianqi Zhou Yongjian Wang Samuel Mbugua Nyambura Xiaoyu Zhang Xi Chen | 2023 | International Journal of Agricultural and Biological Engineering2023，16，3： | 0 |
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