Screw Conveyors

Screw conveyor is a kind of machinery that uses a motor to drive the screw to rotate and move materials to achieve the purpose of

conveying. It can be conveyed horizontally, obliquely or vertically, and has the advantages of simple structure, small cross-sectional

area, good sealing, convenient operation, easy maintenance, and convenient closed transportation. The screw conveyor is divided into

two kinds of shafted screw conveyor and shaftless screw conveyor in the conveying form, and is divided into U-shaped screw conveyor

and tubular screw conveyor in appearance. The shafted screw conveyor is suitable for non-viscous dry powder materials and small

particle materials (such as: cement, fly ash, lime, grain, etc.), while the shaftless screw conveyor is suitable for conveyors made of

viscous and easily wound materials. (For example: sludge, biomass, garbage, etc.) The working principle of the screw conveyor is

that the rotating spiral blades will move the material and carry out the screw conveyor transportation, so that the material does not

rotate with the screw conveyor blades, and the force is the weight of the material itself and the frictional resistance of the screw

conveyor casing to the material. The spiral blades welded on the rotating shaft of the screw conveyor, the surface type of the blade

has solid surface type, belt surface type, blade surface type and other types according to the different conveyed materials. 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, and when the machine length is long, the middle hanging bearing should be added.