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超声气力喷雾装置设计与试验 预览

Design and experiment of ultrasonic pneumatic spray device
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摘要 针对机械化病虫害防治中存在的农药利用率低、喷药效果差、环境污染、作物药害和操作者中毒等问题,利用超声雾化技术,通过设计超声气力喷头、超声波控制系统以及喷头智能行走机构等搭建一台超声气力喷雾装置,并对该平台进行不同工况的喷雾试验研究。采用KEYENCE LK G5000高精度激光位移传感器对100W,200W,300W下雾化面振幅进行测量,结果显示:超声发生器的输出功率与喷头雾化面振幅呈正相关;利用雾滴测试卡和专用分析软件测量统计3种功率下气压值分别为0MPa、0.02MPa、0.05MPa和0.08MPa的雾滴粒径和分布均匀性,结果表明:雾滴体积中径均值由79.15μm减小至30.2μm;功率提高导致分布均匀性变异系数由44.58%减少至14.18%,气压提高导致该系数由22.44%减少至5.93%;通过分析喷头移动速度为0mm/s、流量为3.3mL/min时的喷雾状态,得到该流量下喷头最佳工况:功率为300W,气压值为0.05MPa。 In view of the problems of low utilization rate of pesticides poor spraying effect,environ mental pollution,crop pois oning and operator poisoning in mechanized pest control,a set of ultrasonic pneumatic spraying system was established by using ultrasonic atomization technology and designing ultrasonic pneumatic nozzle,ultrasonic control system and intelligent walking mechanism of nozzle.It is used for spray experiments in different conditions.The KEYENCE LK G5000 high precision laser displacement sensor is used to measure the amplitude of the nozzle atomization surface under different power.The result shows that the output power of the ultrasonic generator is positively correlated with the amplitude of the nozzle surface.The drop test card and special analysis software are used to measure and calculate the particle size and distribution uniformity of the spray under different conditions.The spray state was recorded in the experiment.It is found that increasing the power of ultrasonic generator and the air pressure can lead to snlaller droplet size and better droplet distribution uniformity.However,the excessive power will shorten the life of the nozzle.Therefore,the spray flow should be selected according to the actual operational requirements before use.The best ultrasonic power and air pressure are set to ensure that the nozzle works under optimum conditions.
作者 缪宏 杨东辉 戈林泉 张勐 张玉华 Miao Hong;Yang Donghui;Ge Linquan;Zhang Meng;Zhang Yuhua(College of Mechanical Engineering Yangzhou University,Yangzhou,225000,China;College of Horticulture and plant Protection,Yangzhou University,Yangzhou,225000,China;Yangzhou Chu Juji Machinery Co.,Ltcl,Yangzhou,225000,China;Yangzhou Sanjiang Agricultural Science and Technology Development Co.,Ltd,Yangzhou ,225000,China)
出处 《中国农机化学报》 北大核心 2019年第2期55-61,共7页 Journal of Chinese Agricultural Mechanization
基金 江苏省科技计划项目(KBE2018365) 江苏省农机三新工程项目(NJ2018-07) 扬州市科技计划项目(YZ2018044) 扬卅市科技计划项目(YZ2016246).
关键词 超声气力喷雾 功率 气压值 振幅 粒径 均匀性 ultrasonic pneumatic spraying power air pressure amplitude particle size uniformity
作者简介 第一作者:缪宏,男,1981年生,江苏宜兴人,博士,副教授,硕导;研究方向为智能农业装备、植保机械与施药技术。E-mail:mh0514@163.com.
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