轨道车辆高压无气原子灰喷涂涂层厚度分布研究

Thickness distribution of high-pressure airlessly sprayed atomic ash coating for rail vehicles

[目的]尽管高压无气喷涂在零部件表面腻子喷涂中的应用越来越广泛,但高铁车体腻子喷涂的效率和品质有待提高。[方法]建立了原子灰喷涂雾化流场模型,利用该模型对原子灰高压无气喷涂涂层厚度分布情况进行模拟,分析雾化压力及雾化流场对涂层厚度分布的影响,并搭建原子灰高压无气喷涂系统实验平台进行验证。[结果]对于核心区域的涂层厚度分布,仿真和实验结果之间相差在10%以内。[结论]所建立的喷涂成膜模型可用于研究原子灰涂层无气喷涂涂层厚度的分布规律。

[Introduction]High-pressure airless spraying is more and more widely used in the application of putty spraying on many parts and components.However,the efficiency and quality of putty spraying on the body of highspeed rail vehicle need to be improved.[Method]A flow field model for atomization of atomic ash paint during its spraying was established,and then used to simulate the thickness distribution of the atomic ash coating sprayed by high-pressure airless sprayer.The effects of the atomizing pressure and flow field on the distribution of coating thickness were analyzed.An experimental platform for high-pressure airless spraying of the atomic ash was built for verification of the model.[Result]The difference between the simulated and experimental results of coating thickness distribution within the core area of the specimen was not larger than 10%.[Conclusion]The film formation model is feasible for analysis of the thickness distribution of airlessly sprayed atomic ash coating.