Design and Experiment of Wheat Precision Seed Metering Device with Staggered Hook-tooth
Abstract
Aiming at the demand for precision seeding of wheat and the uniformity seed spacing, a precision seed metering device with staggered hook-tooth was designed. The hook tooth were used to grab seeds orderly, and the staggered arrangement of the teeth allows the falling seeds to form a staggered and ordered surface, reducing collision and overlap between seeds. The key structural parameters and curve profile of the hole were determined by analyzing the seed postures during seed-filling process. The effects of the rotational speed of the seeding wheel and the angle of the seed-filling area on the operation performance were analyzed by using discrete element method EDEM. The simulation results showed that the speed of the seeding wheel had a significant effect on the seeds postures. The increase in the angle of the seed-filling area was conducive to improving the seed-filling performance. However, too large an angle of the filling area may cause the successfully filled seeds to fall out of the hole. On this basis of that, laboratory tests were conducted. Qualified rate, single rate, and multiple rate were used as performance indicators. Rotational speed of seeding wheel, height of seed-filling area and speed ratio of brush/seeding wheel were the test factors. The regression equations of the qualified rate, single rate, and multiple rate were obtained. Through the regression equations, it was found that the optimum performance of the seed metering device was achieved. A validation tests were carried out using the optimal parameters at the seeding wheel speed of 18r/min, the height of seed-filling area of 73mm, and the speed ratio of brush/seeding wheel of 2.5. The qualification rate was 90.36%, and the single rate was 87.26%, which verified the reliability of the regression model. Comparison tests were carried out by selecting the seed metering device commonly used in wheat planter. A high speed camera was used to capture the process of seed dropping. The metering device designed realized the staggered and orderly seeds falling, which improved the uniformity of seed distribution. The research result can provide theoretical support for the development of wheat precision seeding technology.
Keywords: wheat precision seed metering device, staggered hook-tooth, precision seeding;EDEM
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LI Shuanliang,REN Changhong,GE Sangquzhen,et al. Effect of no-tilled wide planting pattern on growth,yield and quality of winter wheat [ J]. Journal of Wheat Crop,2015 ,35 (1 ) : 80 — 85. (in Chinese)
LIU Cailing,DU Xin,ZHANG Fuyin,et al. Design and test of cone diversion type horizontal plate wheat precision seed-metering device [j]. Transactions of the Chinese Society for Agricultural Machinery, 2018,49( 12) :56 -65. (in Chinese)
XU Chunbao,LIU Jingyi,SU Qingmao,et al. Design and experiment of the wheat seed flow multi-channel parallel detection device with thin-surface light refraction [J]. Transactions of the CSAE ,2022 ,38 ( 18) : 81 —91. (in Chinese)
YANG Li,YAN Bingxin,CUI Tao,et al. Global overview of research progress and development of precision maize planters [J] . International Journal of Agricultural & Biological Engineering,2016 ,9( 1 ) :9 -26.
JIANG Meng,LIU Cailing,DU Xin,et al. Development of seeding rate detection system for precision and small amount sowing of wheat [j]. Transactions of the CSAE,2021 ,37(5) ;50 -58. (in Chinese)
MANZONE M,PAOLO M,MARIO T,et al. Performance evaluation of a cyclone to clean the air exiting from pneumatic seed drills during maize sowing [J] . Crop Protection,2015 ,76:33 -38.
FURUHATA M, CHOSA T,SHI0YA Y,et al. Developing direct seeding cultivation using an air-assisted strip seeder [J] . Japan Agricultutal Research Quarterly ,2015 ,49 ( 3 ) :227 -233.
BOURGES G,MEDINA M. Air-seeds flow analysis in a distributor head of an “air drill" seeder [J] . Acta Ilorticulturae,2013 , 1008(34) :259 -264.
ZHANG Xiaohui, WANG Yongzhen, ZHANG Li, et al. Design and experiment of wheat pneumatic centralized seeding distributing system! J ]. Transactions of the Chinese Society for Agricultural Machinery ,2018 ,49 (3 ) : 59 -67. (in Chinese)
LEI Xiaolong, LIAO Yitao,LI Zhaodong,et al. Design and experiment of seed-feeding device in air-assisted centralized metering device for rapeseed and wheat [J] . Transactions of the CSAE,2015 ,31 (20) : 10 — 18. (in Chinese)
WANG Yingbo,LI Hongwen,WANG Qingjie,et al. Design and experiment of wheat mechanical shooting seed-metering device [J] . Transactions of the Chinese Society for Agricultural Machinery ,2020 ,51 ( Supp. 1 ) :73 -84. ( in Chinese)
IIOU Jialin,MA Duanxu, LI Hui,et al. Design and experiment of pneumatic centrifugal combined precision seed metering device for wheat [J] . Transactions of the Chinese Society for Agricultural Machinery,2023 ,54( 10) :35 -45. ( in Chinese)
ZHAO Jin,ZHANG Jinguo,NIAN Yongkang,et al. Design and test of wheat seeder with suction and metering device with cone surface of circular tube [J] . Transactions of the Chinese Society for Agricultural Machinery,2020 ,51 ( Supp. 1 ) *.34 -42. ( in Chinese)
LIU Cailing,WEI Dan, DU Xin,et al. Design and test of wide seedling strip wheat precision hook-hole type seed-metering device [J] . Transactions of the Chinese Society for Agricultural Machinery, 2019, 50( 1 ) :75 -84. (in Chinese)
DU Jun,XIA Junfang,ZHANG Jumin,et al. Design and experiment of pneumatic drum type metering device for rice and wheat [J] . Journal of Huangzhong Agriculture University ,2020,39( 3 ) :127 - 134. (in Chinese)
HE Ruiyin,WANG Jianlin,XU Gaoining,et al. Design and experiment of wheat precise seed metering apparatus with positive and negative pressure with function of limiting seed filling posture [J]. Transactions of the Chinese Society for Agricultural Machinery,2022,53(9) :39 -49,167. (in Chinese)
LIAO Qingxi,GAO Huanwen,ZANG Ying. Experimental study on the cell of the horizontal plate precision meter for corn seed [J] . Transactions of the CSAE ,2003 ,19 (2 ) ; 109 — 113. (in Chinese)
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