喷涂角度对螺栓表面涂层厚度均匀性的影响

针对工程中采用铝涂料涂覆螺栓时螺栓表面铝涂层易出现的厚度不均匀问题,研究喷涂角度对螺栓表面涂层均匀性的影响规律。对喷涂系统的喷嘴和螺栓进行建模,通过计算流体动力学仿真软件Fluent建立了雾化流场的气液两相流物理模型,使用DPM模型分析了流场中气相和液相的相互作用,获得了在不同角度下的喷涂流场,预测了螺栓表面液膜沉积厚度。搭建了喷涂试验系统并与模拟结果进行了验证,模拟和试验研究均表明在喷涂角度为30°时螺栓表面涂层均匀性最佳。

Effect of Spraying Angle on Thickness Uniformity ofBolt Surface Coating

This study investigates the impact of spray angle on the uniformity of the surface coating of bolts when applying aluminum coating in engineering applications, addressing the issue of uneven thickness in the aluminum coating on bolt surfaces. A model of the nozzle and bolts in the spray system was developed. A physical model of the two-phase flow of gas-liquid in the atomization field was established using computational fluid dynamics simulation software, Fluent. The DPM model was employed to analyze the interaction between the gas and liquid phases in the flow field, obtaining the spray flow field at different angles and predicting the deposition thickness of the liquid film on the bolt surface. A spray test system was constructed and compared with the simulation results for validation. Both the simulation and experimental studies indicate that the best uniformity of the bolt surface coating is achieved at a spray angle of 30°.