离心喷头变量喷施系统静态喷雾特性分析--中国农业工程学会农业水土工程专业委员会第十二届学术研讨会推荐论文

郭依剑; 朱兴业; 魏巧; 王鑫建

引用本文:	郭依剑,朱兴业,魏巧,等.离心喷头变量喷施系统静态喷雾特性分析--中国农业工程学会农业水土工程专业委员会第十二届学术研讨会推荐论文[J].灌溉排水学报,2022,():-.
	GUO Yijian,ZHU Xingye,WEI Qiao,et al.离心喷头变量喷施系统静态喷雾特性分析--中国农业工程学会农业水土工程专业委员会第十二届学术研讨会推荐论文[J].灌溉排水学报,2022,():-.

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离心喷头变量喷施系统静态喷雾特性分析--中国农业工程学会农业水土工程专业委员会第十二届学术研讨会推荐论文
郭依剑¹, 朱兴业¹, 魏巧², 王鑫建¹
1.江苏大学流体机械工程技术研究中心;2.江苏润果农业发展有限公司

摘要:

摘要：【目的】探究离心喷头变量喷施系统静态喷雾特性。【方法】采用隔膜泵、高精度涡轮流量计、电磁阀、离心喷头等构建了一套离心喷头变量喷施试验系统，并对其静态喷雾特性进行了试验研究。在喷头流量1.5 L/min，转速分别为8000、9000、10000、11000、12000、13000 r/min条件下，利用水敏纸和雾滴收集装置分别测量雾滴粒径大小和雾滴沉积分布状况。【结果】随着离心喷头转速增加，雾滴粒径逐渐变小；相同喷施半径下不同角度雾滴沉积量不同；离心喷头静态雾滴分布中心剖切面呈双峰分布，随着离心喷头转速增加，雾滴沉积分布中心剖切面左侧峰值呈下降趋势，左侧峰值位置向雾滴分布中心方向移动，右侧峰值基本不变，右侧峰值位置向远离雾滴分布中心方向移动。【结论】离心喷头转速对雾滴粒径大小和雾滴沉积分布状况有显著影响，合理地控制雾滴粒径大小，提高雾滴沉积分布均匀性是提高农药利用率，减少环境污染的关键所在。

关键词: 离心喷头;变量施药;脉冲宽度调制

DOI：

分类号:S49

基金项目:江苏省重点研发计划(现代农业)(BE2021341)；江苏大学农业装备学部项目(NZXB20210101)；江苏省研究生科研与实践创新计划项目(KYCX22_3672)

Analysis of static spray characteristics of variable spray system of centrifugal nozzle

GUO Yijian¹, ZHU Xingye¹, WEI Qiao², WANG Xinjian¹

1.Research Center of Fluid Machinery Engineering and Technology,Jiangsu University;2.Jiangsu Runguo Agricultural Development Co,Ltd

Abstract:

【Objective】To investigate the static spray characteristics of variable centrifugal nozzle spray system. 【Method】A centrifugal nozzle variable spray test system was constructed by using diaphragm pump, high-precision turbine flowmeter, solenoid valve, centrifugal nozzle, etc., and its static spray characteristics were studied. Under the conditions of nozzle flow rate of 1.5 L/min and rotating speed of 8000, 9000, 10000, 11000, 12000 and 13000 r/min, droplet particle size and droplet deposition distribution were measured by water-sensitive paper and droplet collection device respectively. 【Results】With the increase of centrifugal nozzle speed, the particle size of droplets decreased. The deposition amount of fog droplets in the 0.5 m ring area decreased and then increased in two times, and the deposition amount increased in the second time was more than that in the first time. With the increase of the centrifugal nozzle speed, the peak value on the left side of the distribution center of droplet deposition decreased, and the peak value on the left side moved towards the droplet distribution center. The peak value on the right side is basically unchanged, and the peak value on the right side moves away from the droplet distribution center. 【Conclusion】The rotating speed of centrifugal nozzle has significant influence on droplet size and droplet deposition distribution. Reasonable control of droplet size and improvement of the uniformity of droplet deposition distribution are the key to improve pesticide utilization rate and reduce environmental pollution.

Key words: centrifugal nozzle; Variable rate application; Pulse width modulation