Ekologija i kvalitet rada lepezastih mlaznica

Working parameters of fan flat nozzles which affect drop tracks size were the subject of the study. New nozzles and nozzles after laboratory wear were tested. The influence of nozzles wear on drop tracks size were examined. It was found that increase in liquid flow rate results in higher values of mean diameter of drop track. Then increase in working pressure or working speed respectively cause decrease in drop tracks size and reduce merging of drops on spray surface. Increase in wear degree was followed by increased coverage rate. This phenomenon is especially dangerous when using nozzles with a considerable degree of wear for agricultural spray since it ecological threat to the environment. These results can be used in practice, because the conducted experiment explained that nozzle wear degree has influence on ecological characteristics of agricultural spray.Predmet ovog istraživanja bili su radni parametri lepezastih mlaznica koji utiču na dimenzije mlaza. Ispitivane su nove mlaznice i korištene mlaznice posle habanja u laboratoriji. Ispitivan je uticaj pohabanosti mlaznica na dimenzije mlaza. Rezultati su pokazali da povećanje protoka tečnosti dovodi do povećanih vrednosti srednjeg prečnika mlaza. Zatim, povećanje radnog pritiska i radne brzine uzrokuju smanjenje dimenzija mlaza i smanjuju lepljenje kapljica na tretiranoj površini. Veći stepen habanja bio je praćen povećanjem stepena preklapanja. Ova pojava je posebno opasna pri korišćenju jako pohabanih mlaznica za prskanje poljoprivrednih površina, jer predstavlja ekološku pretnju životnoj sredini. Ovi rezultati se mogu upotrebiti u praksi, obzirom da je izvedeni ogled objasnio uticaj stepena pohabanosti mlaznica na ekološke karakteristike poljoprivrednih prskalica