往复式水力冲刷挖藕装置试验平台设计与试验
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作者单位:

华中农业大学工学院/农村农业部长江中下游农业装备重点实验室,武汉430070

作者简介:

刘冉,E-mail:1752165744@qq.com

通讯作者:

周勇,E-mail:zhyong@mail.hzau.edu.cn

中图分类号:

S225.92

基金项目:

国家特色蔬菜产业技术体系专项(CARS-24-D-02)


Design and testing of experiment platform for reciprocating hydraulic flushing and digging device for lotus roots
Author:
Affiliation:

College of Engineering/Ministry of Agriculture and Rural Affairs Key Laboratory of Agricultural Equipment,Middle and Lower Yangtze River,Huazhong Agricultural University,Wuhan 430070,China

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    摘要:

    针对目前传统水力挖藕喷头的固定冲刷方式存在作业效率低、漏冲现象严重的问题,设计一种往复式水力冲刷挖藕装置试验平台。利用Fluent仿真对喷头形状开展单因素试验,得到喷头最优形状为锥柱形。基于EDEM-Fluent耦合仿真对喷头关键尺寸及工作参数开展正交试验,得到喷头最优参数为出水口直径15 mm、离泥高度50 mm及射流角度30°。采用积分法对喷头运动轨迹及冲刷面积进行理论分析,并利用Matlab计算得到喷头理论最优前进速度为17.3 mm/s、摆动速度为130.7 mm/s。基于往复式水力冲刷挖藕装置试验平台开展单喷头冲刷淤泥性能试验,结果显示喷头关键尺寸及工作参数仿真试验可靠。为探究射流角度、前进速度、摆动速度对莲藕挖净率的综合影响,开展Box-Behnken中心组合性能试验,结果显示,当射流角度为27.4°、前进速度为10.6 mm/s、摆动速度为191.1 mm/s时,莲藕挖净率最大,仿真模拟与台架试验结果显示莲藕挖净率分别为93%和91%。

    Abstract:

    An experiment platform for reciprocating hydraulic flushing and digging device for lotus roots was designed to solve the problem of low operating efficiency and serious leakage existing in the fixed flushing method of traditional hydraulic digging nozzles for lotus roots.Fluent simulation was used to conduct one-factor experiments on the shape of the nozzle and obtain the cone-column shape as the optimal shape.EDEM-Fluent coupled simulation was used to carry out L9(34) orthogonal experiments on the key dimensions and working parameters of the nozzle and obtain the optimal parameters for the nozzle being a diameter of water outlet of 15 mm,a height of mud clearance of 50 mm,and a jet angle of 30°.The integral method was used to theoretically analyze the trajectory and flushing area of nozzle.The optimal forward speed and swing speed of the nozzle in theory were calculated with Matlab to be 17.3 and 130.7 mm/s.The performance of a single nozzle flushing silt was tested based on the test platform of reciprocating hydraulic flushing and digging device.The results verified the reliability of key dimensions and working parameters of the nozzle obtained from the simulation experiments.A Box-Behnken center combination performance test was conducted to investigate the comprehensive effects of jet angle,forward speed,and swing speed on the digging rate of lotus roots.The results showed that the digging rate of lotus roots was the highest when the jet angle,the forward speed,and the swing speed was 27.4°,10.6 mm/s,and 191.1 mm/s.The digging rate of lotus roots in the simulation and the test platform was 93% and 91%.It will provide reference for studying the principles of harvesting machinery and hydraulic flushing of lotus roots.

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刘冉,周勇,张国忠,陶国瑛,唐楠锐,唐昊建,宿衍强.往复式水力冲刷挖藕装置试验平台设计与试验[J].华中农业大学学报,2025,44(5):229-240

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  • 收稿日期:2024-08-24
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  • 在线发布日期: 2025-10-10
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