Shooting Flow Shape and Control of Organic Fertilizer Side Throwing on Inclined Opposite Discs
-
摘要: 为进一步提高倾斜对置圆盘侧抛式有机肥抛撒装置在抛射均匀性与抛射距离等方面的性能,采用抛离角、散射角和有效抛距等参数定性定量描述了射流形态,通过理论分析建立的数学模型,得到圆盘转速、圆盘倾角与刮肥板的形状等因素可影响射流形态,通过仿真试验分析抛撒装置的结构参数与射流参数之间的关系,结合仿真结果创新设计宽底外延倾斜四边形刮肥板、抛离角控制挡板等零部件,通过样机试验检验射流的抛射效果。研究结果表明:抛离角控制挡板高为140 mm,上导流板导出角为40°时,可将射流的抛离角控制在最佳抛离角30°左右,宽底外延倾斜四边形刮肥板可将散射角降低至25°,获得窄幅射流减小射流的迎风面,得到11.6 m的有效抛距,宽底外延倾斜四边形刮肥板与抛离角控制挡板共同作用下可形成无导向阻碍的柔性筒腔,行走抛射覆盖均匀。通过部件设计与结构参数优化有效控制了抛撒装置的射流。Abstract: In order to further explore the effectiveness potential of the inclined opposite disk side throwing device in the aspects of throwing uniformity and throwing distance, the shooting flow shape was described qualitatively and quantitatively by using the parameters such as the angle of shooting, scattering angle, and effective throw distance, etc. Through the theoretical analysis, the mathematical models between each parameter and the structural parameters of the throwing device were established. Then, through these models, it was obtained that factors such as the speed of the discs, the inclination angle of the discs and the shape of the scraper had an influence on the shooting flow shape. Based on the simulation results, the wide bottom extended inclined quadrilateral fertilizer scraper, throw-off angle control baffle and other parts were innovatively designed, and the ejection effect of the shooting flow was tested by the prototype test. The results showed that when the height of the throw-off angle control baffle was 140 mm and the leading out angle of the upper deflector was 40°, the throw-off angle of the shooting flow can be controlled at about 30°, the innovative design of wide bottom extended inclined quadrilateral fertilizer scraper can reduce the scattering angle to 25°, a narrow shooting flow was obtained to reduce the upwind side of the shooting flow, and the effective throw distance was 11.6 m. Under the joint action of this part and the throw-off angle control baffle, a flexible cylinder without guide obstruction was formed, and the throwing effect was better. The research effectively controlled the shooting flow of the spreader by innovating components and optimizing structural parameters, it provided theoretical basis and basic data for improving the operation ability of the side throwing device with inclined opposite discs.
-
-
[1] BERNIK R,DUHOVNIK J,BENEDIEIE J.side-delivery spreading of manure[J].Transactions of the ASAE,2006,49(6):1663-1675.
[2] BERNIK R,BENEDICˇΙCˇJ,DUΗΟVΝΙΚJ.Conceptual design of a stable-manure spreader using a mathematical model[J].Journal of Mechanical Engineering,2003,49(11):538-548.
[3] LANDRY H,LAGUE C,ROBERGE M,et al.Discrete element modeling of machine-manure interactions[J].Computers and Electronics in Agriculture,2006,52(1-2):90-106.
[4] CHEN Wei,WILLIAMS K,DONOHUE T,et al.Application of the image processing technique in identifying the particle dispersion from a centrifugal fertilizer spreader[J].Particulate Science and Technology,2017,35(5):607-615.
[5] COOL R,PIETERS G,SEATOVIC D,et al.Development of a stereovision-based technique to measure the spread patterns of granular fertilizer spreaders[J].Sensors,2017,17(6):1396.
[6] 吕金庆,孙贺,兑瀚,等.锥形撒肥圆盘中肥料颗粒运动模型优化与试验[J].农业机械学报,2018,49(6):85-91,111.LÜ Jinqing,SUN He,DUI Han,et al.Optimization and experiment of fertilizer particle motion model in conical spreading disk[J].Transactions of the Chinese Society for Agricultural Machinery,2018,49(6):85-91,111.(in Chinese) [7] 杨立伟,陈龙胜,张俊逸,等.离心圆盘式撒肥机撒肥均匀性试验[J].农业机械学报,2019,50(增刊):108-114.YANG Liwei,CHEN Longsheng,ZHANG Junyi,et al.Test and analysis of uniformity of centrifugal disc spreading[J].Transactions of the Chinese Society for Agricultural Machinery,2019,50(Supp.):108-114.(in Chinese) [8] 刘宏新,王佳兴,苏航,等.倾斜对置圆盘侧抛式有机肥撒播机设计及关键部件研究[J].东北农业大学学报,2018,49(8):83-90,98.LIU Hongxin,WANG Jiaxing,SU Hang,et al.Design on side type discharge organic fertilizer spreader with inclined opposite discs and research on its key components[J].Journal of Northeast Agricultural University,2018,49(8):83-90,98.(in Chinese) [9] 戴飞,宋学锋,赵武云,等.全膜双垄沟覆膜土壤离散元接触参数仿真标定[J].农业机械学报,2019,50(2):49-56,77.DAI Fei,SONG Xuefeng,ZHAO Wuyun,et al.Simulative calibration on contact parameters of discrete elements for covering soil on whole plastic film mulching on double ridges[J].Transactions of the Chinese Society for Agricultural Machinery,2019,50(2):49-56,77.(in Chinese) [10] 刘宏新,王晨,王佳兴,等.车载便携式农家肥捡拾装置设计与试验研究[J].东北农业大学学报,2017,48(9):59-71,96.LIU Hongxin,WANG Chen,WANG Jiaxing,et al.Design and experiment study on portable in-vehicle device of farmyard manure collecting[J].Journal of Northeast Agricultural University,2017,48(9):59-71,96.(in Chinese) [11] 王金武,王奇,唐汉,等.水稻秸秆深埋整秆还田装置设计与试验[J].农业机械学报,2015,46(9):112-117.WANG Jinwu,WANG Qi,TANG Han,et al.Design and experiment of rice straw deep buried and whole straw returning device[J].Transactions of the Chinese Society for Agricultural Machinery,2015,46(9):112-117.(in Chinese) [12] 周韦,王金峰,王金武,等.基于EDEM的水田深施肥机构螺旋钢丝的数值模拟与分析[J].农机化研究,2015,37(1):27-30.ZHOU Wei,WANG Jinfeng,WANG Jinwu,et al.Numerical simulation and analysis of a fertilizer can on fertilizer spreader based on EDEM[J].Journal of Agricultural Mechanization Research,2015,37(1):27-30.(in Chinese) [13] 黄玉祥,杭程光,苑梦婵,等.深松土壤扰动行为的离散元仿真与试验[J].农业机械学报,2016,47(7):80-88.HUANG Yuxiang,HANG Chengguang,YUAN Mengchan,et al.Discrete element simulation and experiment on disturbance behavior of subsoiling[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(7):80-88.(in Chinese) [14] HOU Q,DONG K,YU A.DEM study of the flow of cohesive particles in a screw feeder[J].Powder Technology,2014,256:529-539.
[15] KRETZ D,CALLAU-MONJE S,HITSCHLER M,et al.Discrete element method (DEM) simulation and validation of a screw feeder system[J].Powder Technology,2016,287:131-138.
计量
- 文章访问数: 0
- HTML全文浏览量: 0
- PDF下载量: 0
下载:
