engleski

Surface distribution of the liquid nozzle field

The paper presents research results of the surface distribution liquid in two agricultural sprayer nozzles at working pressure 2 and 3 bar, and working at heights 40 and 60 cm. Research was conducted at 11004 marks nozzles made of brass, the company "Mlaz" and "Kovin. It was found that the company "Mlaz" nozzle flows achieved average test value at 2 bar pressure from a value of 1.30 l min­¹ at the standard variation coefficient 0.015 deviation of 1.19%, while the 3 bar realized value 1.58 lmin­¹, the standard deviation is 0.0316 and variation coefficient 1.99% Also, the company "Kovin" nozzles achieved an average flow value at 3 bar 1.61 lmin­¹ with the implementation of the standard deviation 0.012 and variation coefficient of only 0.75%, and at 2 bar 1.33 lmin­¹ with 0.0136 standard deviation of variation coefficient 1.01%. The water surface allocation of the nozzle from the company "Mlaz" take the average working width spray at 2 bar working pressure and 40 cm working height that was 131.25 cm, and 60 cm working height for average spray width which was 176.56 cm. At 3 bars working pressure and 40 cm working height, average spray width was 134.37 cm, and at 60 cm working height, average spray width was 174.68 cm. The company "Kovin" nozzles at 2 bar working pressure and 40 cm working height have an average 106.25 cm width from the spray and the 60 cm working height achieved an average 151.56 cm width sprout. At 3 bar working pressure and 40 cm working height, average spray width was 109.68 cm. Also, and 60 cm working height was 153.12 cm. Furthermore, the triple covering these nozzles achieved liquid distribution strip of 50 cm width. The company, "Mlaz" nozzles, at 2 bar working pressure and 40 cm working height achieved 29.63% variation coefficient. In addition, the 60 cm working height made 27.62% variation coefficient these nozzles at 3 bar working pressure and 40 cm working height achieved 18.39% variation coefficient, and with the 60 cm working height and the same working pressure they achieved 28.76% variation coefficient. The company "Kovin" nozzles at 2 bar working pressure and 40 cm working height managed much lower variation coefficient for the 50 cm strip width (with a triple overlap) of only 5.16%, and the 60 cm working height made 5.49% variation coefficient. The same nozzle at the 3 bar working pressure and 40 cm working height achieved 11.51% variation coefficient, and the 60 cm working height and the same working pressure at the triple overlay achieved only 4.30% variation coefficient. So, according to the scientific knowledge we certainly recommend the company "Kovin" nozzles for usage in the protection of field crops.

nozzle ; the flow ; variation coefficient ; a triple overlap ; ISO standard

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