Optimization Study On The Spray Gun Structure Based On Numerical Simulation

Air atomization paint spray gun is an essential tool in the field of painting, experienced about 130 years from its appearance. It has developed from the traditional high-pressure atomization spray gun to today’s popular HVLP spray guns RP spray guns. The painting rate have been greatly improved and its pollution to the environment is also getting smaller and smaller, in order to further improve the efficiency of spraying and painting rate, reduce its pollution and energy waste, this paper has studied the gun. The issue has done some simulation analysis about spray gun under different parameters, the results are summarized as follows:Firstly, this paper has changed the structure parameters of primary atomization hole and fan control pores. Changing the shape and the angle of the primary atomization holes, changing the fan control hole’s shape, position and angle, and established three-dimensional model under different structural parameters, the grid was obtained.Secondly, Chosen FLUENT as a simulation software, single-phase simulation analysis were obtained about primary atomization hole under the conditions of different shapes and rounded angles, pattern distribution and velocity maps were obtained based on the results of the analysis, and analyzed the results.Thirdly, single-phase simulation analysis were designed about fan control holes under different shape, orientation, angle and pressure, there has pattern distribution and velocity maps based on the results of analysis, and the results were analyzed.Lastly, According to the structure and parameters of the selected set of the overall gun liquid two-phase simulation analysis, acquired the circular pattern and elliptical pattern, and the speed diagram was intercepted, and the results were analyzed.