Structural Optimization Design and Analysis of the Spraying-Plastering Integrated Robot Nozzle

Liming Si; Zhibin Yao

doi:10.54097/7bmkma68

Authors

Liming Si
Zhibin Yao

DOI:

https://doi.org/10.54097/7bmkma68

Keywords:

Spraying Robot, Structural Optimization, Fluid Simulation, Electrostatic Device, Powder Accumulation.

Abstract

As a core surface treatment process in modern industry, electrostatic powder spraying technology demands high coating quality; however, integrated spraying-plastering robots frequently encounter powder accumulation issues in electrostatic devices and nozzles, adversely affecting spraying efficiency, coating uniformity, and equipment lifespan. This study establishes a three-dimensional nozzle model using SolidWorks, and employs ANSYS FLUENT for multiphysics coupling simulations to analyze structural deficiencies in the original design and propose rational optimization schemes. By reconstructing the single-beam electrostatic device into three slender beams arranged in an equilateral triangular distribution (1 mm in width) and adopting a conical inner cylinder design, the gas flow characteristics and powder distribution uniformity are significantly improved. Static analysis shows that the maximum stress of the optimized nozzle is reduced from 0.2627 MPa to 0.1436 MPa, with deformation decreased by 59.8%, which is far below the material's safety threshold. Fluid dynamics simulations verify the airflow stability of the optimized structure; both single-phase flow and discrete phase models demonstrate a 31% improvement in the uniformity of outlet velocity distribution, with reduced powder retention. This study offers valuable insights for the high-efficiency and low-energy-consumption design and structural optimization of integrated spraying-plastering robot nozzles.

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