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螺旋输送机主要由料槽、输送螺旋和驱动装置组成。当机长较长时应加中间吊挂轴承,如图9-17所示。螺旋叶片固装在轴上,螺旋轴纵向装在料槽内。每节轴有一定长度,节与节之间联结处装有悬挂轴承。一般头节的螺旋轴与驱动装置连接,出料口设在头节的槽底,进料口设在尾节的盖上。物料由进料口装入,当电动机驱动螺旋轴转动时,物料由于自重及与槽壁间摩擦力的作用,不随同螺旋一起旋转,这样由螺旋轴旋转产生的轴向推动力直接作用到物料上,使物料沿轴向滑动。输送物料情况恰似被持住而不能旋转的螺母沿着螺杆作平移一样,朝着一个方向推进到卸料口处卸出。
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