Izvorni znanstveni članak
EFFECT OF ORIFICE WEAR OF BOOM SPRAYER NOZZLES ON SPRAY CHARACTERISTIC
Vinko Duvnjak
; Poljoprivredni institut Osijek, Osijek, Hrvatska
Stjepan Pliestić
; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Dubravko Filipović
; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Đuro Banaj
; Poljoprivredni fakultet Sveučilište u Osijeku, Osijek, Hrvatska
Luka Andrić
; Poljoprivredni institut Osijek, Osijek, Hrvatska
Sažetak
Objectives of this investigations were to determine effects of nozzle wear on some most important spray characteristic. In detail, flow rates, spraying angle and distribution pattern were checked and compared with data taken from firms informations. The investigated nozzles were flat fan type, made from different materials. Flat fan nozzles are the most common used tip of nozzles in applying pesticides in Croatian arable farming. The relative wear rates of nozzle materials varied greatly with differnt time of use. At the end of test periods, hardened stainless was the most resistant to wear, followed, by stainless steel, plastic and brass nozzles. Nozzles with lower flow rates wore at faster rates compared to nozzles with higher flow rates. Analyzing the spray angles it was determined that an increase in flow rate due to nozzle wear corresponded to a reduction in the spray angle. There was little difference between the spray deposit distributions of new and worn fan nozzles in widths of patterns. However, the worn nozzles delivered greater volumes of liquid in the centers of patterns.
Ključne riječi
nozzle; wear; nozzle material; flat fan type; spray; spraying angle, spray patterrn
Hrčak ID:
52040
URI
Datum izdavanja:
26.2.2010.
Posjeta: 1.796 *