气孔分布对气垫带式输送机性能影响的数值模拟

Numerical simulation of the effect of air hole distribution on the performance of air cushion belt conveyors

气垫带式输送机应用于输煤系统可以提高输煤的安全性和稳定性,而气孔分布方式对输送机性能影响显著。针对一个带有完整双圆弧气室的气垫带式输送机开展了数值模拟分析,模拟采用先进的尺寸自适应模型、动网格技术和六自由度模型,预测了输送带和物料在气膜作用下的抬升过程。通过与实验数据进行对比,验证了数值模拟的准确性。通过进一步模拟不同气孔分布方式的工况,获得了输送机气膜内的流场特征和压力分布特征。在开孔列数交错排列时,输送机的空气消耗量更少,气膜内压力分布更均匀。研究结果对气垫带式输送机的进一步优化设计具有重要意义。

The application of air cushion belt conveyor in coal conveying system can improve the safety and stability of coal conveying,and the way of air hole distribution has a significant impact on the conveyor performance.In this study,a numerical simulation analysis was carried out for an air cushion belt conveyor with a complete double arc air chamber.The simulation used an advanced size-adaptive model,dynamic mesh technique and 6-degree-of-freedom model to predict the lifting process of the conveyor belt and material under the action of the air film.The accuracy of the numerical simulation was verified by comparing with the experimental data.By further simulating the working conditions with different types of air holes arrangements,the study obtained the flow field characteristics and pressure distribution characteristics inside the air film of the conveyor.When the air holes arrangement is staggered,the air consumption of the conveyor is less and the pressure distribution inside the air film is more uniform.The research results are of great significance for the further optimization design of air cushion belt conveyors.