植保机械分体式喷嘴材质与结构对雾化性能影响研究OA

Conventional integrated-structure nozzles suffer from fixed parameters and high maintenance costs,whereas modular nozzles allow flexible adjustment of structural parameters through interchangeable nozzle inserts,with atomization performance determined directly by the nozzle insert.This study uses a hollow-cone nozzle as the base structure and investigates the effects of insert material and structural parameters on atomization quality by varying one factor at a time.The experimental results indicate that,in terms of material,the YG6 carbide nozzle insert outperforms the 304 stainless steel and TiN-coated nozzle inserts;structurally,the spray angle increases as the outlet straight-section length decreases and decreases as the inlet cone angle increases.When the outlet straight-section length is 0.5 mm or smaller and the pressure ranges from 0.2 to 0.5 MPa,the droplet volume median diameter remains between 105 and 150 μm,with a relative span factor of less than 1.1,indicating fine atomization and uniform droplet distribution.It is also found that the nozzle inserts with a 60° inlet cone angle achieved the maximum spray angle(64.28°)at 0.5 MPa,while demonstrating favorable droplet size distribution and uniformity.Accordingly,the YG6 carbide nozzle insert combined with a 0.5 mm outlet straight-section length and a 60° inlet cone angle maximizes the spray angle,refines the droplet size,and ensures uniform distribution,offering a direct selection basis for the refined design of agricultural sprayers and precision pesticide application.