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screw conveyor is a mechanical device that uses an electric motor to drive a screw to rotate and move materials to achieve conveying purposes. It can be transported horizontally, obliquely, or vertically, and has the advantages of simple structure, small cross-sectional area, good sealing, convenient operation, easy maintenance, and convenient enclosed transportation. Screw conveyors are divided into two types in terms of conveying form: axial screw conveyors and non axial screw conveyors. In terms of appearance, they are divided into U-shaped screw conveyors and tubular screw conveyors. The axial screw conveyor is suitable for non viscous dry powder materials and small particle materials For example, cement, fly ash, lime, grain, etc.) and the shaftless screw conveyor is suitable for conveying sticky and easily entangled materials. The working principle of a screw conveyor (such as sludge, biomass, garbage, etc.) is that the rotating screw blades push the material forward and transport it through the screw conveyor. The force that prevents the material from rotating with the screw conveyor blades is the weight of the material itself and the frictional resistance of the screw conveyor shell to the material. The spiral blades welded on the rotating shaft of the screw conveyor have different surface shapes
according to the conveyed materials, such as solid surface, belt surface, and blade surface. The screw shaft of the screw conveyor has a thrust bearing at the end of the material movement direction to provide axial reaction force to the screw with the material. When the machine length is long, an intermediate hanging bearing should be added.
