The spiral blade welded on the rotating shaft of the screw conveyor, the surface shape of the blade has a solid surface type, a blade surface type and the like according to different materials to be conveyed. The screw shaft of the screw conveyor has a thrust bearing at the end of the material moving direction to give the axial reaction force of the spiral with the material. When the length of the machine is long, the intermediate hanging bearing should be added.
The screw conveyor is divided into a shaft screw conveyor and a shaftless screw conveyor in the form of conveying and is divided into a U-shaped screw conveyor and a tubular screw conveyor in the outer shape. Axial screw conveyors are suitable for non-stick dry powder materials and small granular materials (eg cement, fly ash, lime, grain, etc.) and shaftless screw conveyors are suitable for conveyors from viscous and entangled materials.