Design and testing of a pneumatic precision metering device for wheat                                                     ...
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Design and testing of a pneumatic precision metering device for wheat

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By Yasir Hassan Satti*, Qingxi Liao, Jiajia Yu, Daley He
*Corresponding author: yasshiri@gmail.com

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Design and testing of a pneumatic precision metering device for wheat

  1. 1. Design and testing of a pneumatic precision metering device for wheat Yasir Hassan Satti1, 2, Qingxi Liao, Jiajia Yu, Daley He 1- Dept. of agric. Engineering, fac. of agric. Sciences, University of Dongola, Sudan 2- College of Engineering, Huazhong Agricultural University (HZAU), Wuhan-Hubei -China Introduction: Results: The conventional fluted meters for drilling often resulted in poorly Acceptable seed rate (53 KPM) within an acceptable percentage of QFI spaced stands with many gaps. Precision vacuum seeders provide (89.11%), MULI (9.00%) and MISI (1.88%) under laboratory conditions. higher dosage preciseness with lower rate of seed damage caused by seed plate. Pneumatic metering devices compared with the Uniform seedling emergence yielding 85.70% QFI under field conditions. standard bulk metering seeder used 90% less seed Giannini et al., (1967) The results form simulation, dynamic analysis, laboratory and field experiments were found to be in agreement. Objectives: Innovation of a new precision metering devise for wheat based on pneumatic principle to save high quality seeds, reduce the total 19.0 rpm and 2.5 kPa cost and increase yield. Methods: 19.0 rpm and 4.0 kPa 39.0 rpm and 4.0 kPa Fig.5: kernels distribution under different levels of ANSYS-CFX for simulating some parameters, CAXA and Pro/ENGINEER softwares for 2D and 3D sketching respectively, operational par ameters manufacturing a prototype, Optimization of operational 100 100 90 90 parameters (rotating speed and negative pressure) based on 80 80 quality of feed index (QFI %), miss index (MISI %) and multiple 70 70 index (MULI %) using a Test stand with camera system under 60 60 indices % indices % laboratory conditions, field experiments, SAS system for DATA 50 50 40 40 analysis applying 5×5 RCB statistical design with five levels of the 30 30 rotational speed (RS) and negative pressure (NP). 20 20 10 10 0 0 2.5 3 3.5 4 4.5 19 24 29 34 39 negative pressure (kPa) rotating speed (rpm) MISI MULI QFI MISI MULI QFI Fig. 6-a: Effe ct of negative pressure on Fig. 6-b: Effect of rotating speed on performance indices performance indices A B C 50 50 45 45 40 40 Cylindrical pressure inlet number of kernels/m number of kernels/m 35 35 30 30 25 25 20 20 15 15 10 10 5 5 A B C 0 0 2.5 3 3.5 4 4.5 19 24 29 34 39 Revolved pressure inlet negative pressure (kpa) rotating speed (rpm) Fig.1: simulation of negative pleasure under different structures of Fig. 7-a: Effe ct of negative pressure on Fig.7-b: Effect of rotating speed preasure inlet and seed hole of 1.8 mm, 2.00 mm and 2.5 mm in A, B number of kernels per meter on number of kernels per and C respectively meter A B C Cylindrical pressure inlet Fig. 8: On-road experiment for the Fig. 9: uniformly distribution and singulation pneumatic precision metering device for of wheat kernels wheat using 2 BFQ-6 planter A B C Revolved pressure inlet Fig.2: simulation of negative pleasure under different positions of preasure inlet inclined with 0°, 20° and 30° in A, B and C Fig. 10: Acceptable plant density three weeks after sowing date respectively Conclusions:A B Seed outlet C  The device can successfully and precisely be used for wheat sowing at different levels of speeds and negative pressure  The recommended seed rate was realized at a range of rotating speed and negative pressure  Non-spherical seeds are easy to be metered with this device. Seed inlet  Seed damage was observed to be zero over all treatments Fig3: 3D sketching (A) and prototype of precision wheat seeder (B and C)  Uniform distribution within the recommended seed rate under suitable operating conditions. Acknowledgements: We are indebted to the Ministry of Higher Education and Scientific research (Sudan), fund for Modern Agro-industry Technology Research System (CARS- 13) and the Fundamental Research Funds for the Central Universities (2011PY021) for their financial support,Fig.4: testing the wheat seeder under laboratory conditions using test stand w ith camera system

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