Use of an air curtain to counteract the headwind when spraying field crops

Abstract

Annotation Purpose. Improving the efficiency of field crop spraying and saving plant protection products by developing adaptations to field crop sprayers that will minimize the negative impact of headwind on the quality of this process. Methods. Theoretical calculations, their analysis and experimental verification. Results. The structural diagram of the method and device to the sprayer to create an air curtain was substantiated, which provided an increase in the allowable wind speed during spraying up to 7 m/s. Conclusions. It is established that with the use of a fan with a flow rate of 6000 m3/h, full air pressure of 6000 Pa and a reserve power of 30 kW of a tractor 1.4 class on the drive of the fan device to the sprayer, the maximum permissible diameter of the nozzle to create an air curtain is 0.02 m, and the sprayer grip width is 18 m. With the above parameters and operating modes of the air curtain and air velocity in nozzles of 30 m/s the air curtain can increase the permissible wind speed during spraying up to 7 m/s. Keywords: toxic chemicals, spraying, sprayer device, wind, air curtain, parameters, operating modes.