| 引用本文: | 郭依剑,朱兴业,童林丹,等.离心喷头变量喷施系统静态喷雾特性分析[J].灌溉排水学报,2023,42(1):100-105. |
| GUO Yijian,ZHU Xingye,TONG Lindan,et al.离心喷头变量喷施系统静态喷雾特性分析[J].灌溉排水学报,2023,42(1):100-105. |
|
| 摘要: |
| 【目的】探究离心喷头变量喷施系统的静态喷雾特性。【方法】采用隔膜泵、高精度涡轮流量计、电磁阀、离心喷头构建了一套离心喷头变量喷施系统，对其静态喷雾特性进行了试验分析。在喷头流量为1.5 L/min，转速分别为8 000、9 000、10 000、11 000、12 000、13 000 r/min条件下，利用水敏纸和雾滴收集装置分别测定了雾滴粒径的大小和雾滴沉积分布状况。【结果】随着离心喷头转速的增加，雾滴粒径逐渐变小；相同喷施半径下，不同角度的雾滴沉积量不同；离心喷头静态雾滴分布中心剖切面呈双峰分布，随着离心喷头转速的增加，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的方向移动。【结论】离心喷头转速对雾滴粒径大小和雾滴沉积分布状况存在显著影响，合理控制雾滴粒径大小、提高雾滴沉积分布均匀性是提高喷洒过程中的农药利用率、减少环境污染的关键。 |
| 关键词: 离心喷头；变量施药；脉冲宽度调制 |
| DOI：10.13522/j.cnki.ggps.2022387 |
| 分类号: |
| 基金项目: |
|
| Analyzing Static Spray Characteristics of Variable Spray System of Centrifugal Nozzle |
|
GUO Yijian, ZHU Xingye, TONG Lindan, WEI Qiao, WANG Xinjian
|
|
1. Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China;
2. Jiangsu Runguo Agricultural Development Co., Ltd., Zhenjiang 212013, China;
3. Quality Inspection Center for Pump Products in Zhejiang Province, Wenling 317599, China
|
| Abstract: |
| 【Objective】This paper is to investigate experimentally the static spray characteristics of variable spray systems of centrifugal nozzles. 【Method】 A centrifugal nozzle variable spray test system was constructed by using a diaphragm pump, a high-precision turbine flowmeter, a solenoid valve and a centrifugal nozzle. Its static spray characteristics were studied for the nozzle flow rate in the range from 1.5 L/min to 13 000 r/min. For each nozzle flow rate, we measured the water droplet sizes and deposition distribution of the droplets using water-sensitive paper and droplet collection devices, respectively. 【Result】With the increase in centrifugal nozzle flow rate, the size of droplets decreased. The deposition amount of fog droplets in the 0.5 m proximal to nozzle decreased first and then increased showing a double-peak patten, with the deposition amount increased in the second peak more than in the first peak. With the increase in the centrifugal nozzle flow rate, the peak value on the left side of the distribution center of the droplet deposition decreased, and the peak value on the left side skewed towards the droplet distribution center. The peak value on the right side remained unchanged, while the peak value on the right side moves away from the droplet distribution center.【Conclusion】The rotating speed of the centrifugal nozzle has a significant influence on sizes and deposition distribution of the water droplets. Reasonably controlling the droplet size to improve the uniformity of the droplet deposition distribution is a key to improving pesticide utilization and reducing its leaching to the environment. |
| Key words: centrifugal nozzle; variable rate application; pulse width modulation |
