农用高压静电喷雾场的实验

运用相位多普勒粒子分析仪,从喷雾宽度、雾滴的粒径和速度分布方面对农用高压静电喷雾场进行了实验和分析。结果表明,与非荷电时相比,静电喷雾能使平均粒径下降,但在起始充电电压时粒径分布的均匀性和速度分布的对称性均不理想。在30kV电压以内,从低压到高压,平均粒径和速度均有所增加,而分布状况却不断改善,对于具体的静电喷雾施药场合应采取相应的取舍。当充电电压达到40kV时,雾滴在植株界面上易于粘附,同时也具有较优良的综合技术性能。

Measurement of Agricultural High-voltage Electrostatic Spraying Field by Using PDPA

Using PDPA measuring system, the agricultural high-voltage electrostatic spraying field was tested and analyzed from the aspect of spraying width, diameter and velocity distributions of droplets. The experimental results indicated that the average particle diameter declined by using electrostatic spray, but the uniformity of particle diameter distributions and the symmetry of velocity distributions were not fine in initial stage of charge application. In the range of 30 kV voltage, average particle diameter and average velocity increased slightly but their distribution condition improved continuously along with the increment of voltage. And the appropriate voltage depended on the practical occasions of electrostatic spraying application. When the voltage was up to 40 kV, droplets were easy to adhere to the plants surface and the excellent comprehensiveness technology performance could be obtained.