When the screw shaft rotates, due to the gravity of the material and the friction generated by the wall of the trough, the material can only move forward along the bottom of the conveyor trough under the push of the blades. The rotating screw makes the same translational motion [3]. The movement of the material in the middle bearing depends on the thrust of the material moving forward. Therefore, the transportation of materials in the conveyor is entirely a slipping motion. In order to make the screw shaft in a more favorable tension state, generally the driving device and the discharge port are placed on the same end of the conveyor, and the feed port is placed as close as possible to the tail of the other end. The rotating screw blade pushes the material for transportation, so that the force that the material does not rotate with the screw conveyor blade is the weight of the material and the frictional resistance of the screw conveyor casing to the material. The surface of the blade has solid surface, belt surface, blade surface and other types according to the different materials to be conveyed. The screw shaft of the screw conveyor has a thrust bearing at the end of the material movement direction to give the axial reaction force of the screw with the material. When the length of the machine is long, the middle hanging bearing should be added.
