全充填的水平圆管螺旋输送机物料运动分析及输送量计算

STUDY ON MOVEMENT AND CONVEYING MASS OF BULK MATERIAL IN FULLY-FILLED HORIZONTAL PIPE SCREW CONVEYER

圆管螺旋输送机在完全充填状态下,物料的受力非常复杂,其运动形式与普通螺旋输送机完全不同。运用散体力学的相关理论分析机内物料的受力情况,将复杂的受力进行合理的简化并建立力学模型,用微积分方法计算来自于螺旋叶片的作用力及方向角。结果表明:圆管螺旋输送机在完全充填状态下,物料的运动方向可根据螺旋叶片的尺寸、表面摩擦系数、机筒尺寸等计算获得。在此基础上进一步导出了物料的轴向移动速度和流量计算公式,最后通过流量的计算值和实测值对比,确定了最终的计算公式。

Under full-filling conditions,the motion form of bulk materials in horizontal pipe screw conveyor is complex and completely different from that of ordinary screw conveyor.In this study,bulk mechanics theory was applied to analyze the mechanical condition of materials in the machine,the complicated force was simplified reasonably for establishing mechanical model,and the force and direction angle from the spiral blade were calculated by calculus.The results showed that the movement direction of bulk materials in horizontal pipe screw conveyor could be calculated under full-filling conditions according to the size of the screw blade,the friction coefficient of the screw blade and the size of the machine barrel.And then,the calculation formulas of axial movement speed and flow of materials were further derived.Finally,the final calculation formula was determined by comparing the calculated value of flow with the measured value.