沥青混合料保温车螺旋输送机结构设计和仿真

Design and Simulation of the Screw Conveyor for Asphalt Mixing Material Insulation Vehicle

针对沥青混合料保温车螺旋输送机,从速度分析入手,应用数学方法推导出螺旋输送机的轴向运动速度和圆周速度,从而进一步推导出螺旋轴转速、螺旋叶片直径、螺旋螺距等计算公式,进而完成沥青混合料螺旋输送机参数设计。最后,运用工程流体力学软件EFD软件建立了螺旋输送机内物料流动分析模型,对沥青混合料流动过程进行数值模拟,结果表明,输送机工作时将能带动物料混合搅拌,但由于出口处空间限制,要靠螺旋面挤出卸料,应尽可能减少伸出尺寸。

For the screw conveyor of the asphalt mixture insulation vehicle,by means of the mathematical methods the axial movement speed and the circumferential speed of the screw conveyor are derived,and then the calculation formula of the spiral shaft rotation speed,helical blade diameter and pitch are deduced.According to the calculation formula,the design parameters of the screw conveyor of the asphalt mixture insulation vehicle are calculated.Finally,by using of Engineering Fluid Dynamics software the material flow analysis model of the screw conveyor is established,and the flow field of asphalt mixing material is simulated.The results show that the screw conveyor can stir and mix the materials,as a result of exit space limitation the material is dumped by screw extrusion and should minimize the extend size.The reference for the selection,design and optimization of the screw conveyor will be provided by the research results.