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Screw conveyor types and classification

Screw conveyor commonly known as the dragon, screw conveyor using rotating spiral blade to push the material goes on conveying.

Screw conveyor types and classification

Screw conveyor commonly known as thedragon, screw conveyor using rotating spiral blade to push the material goes onconveying. The force that the material does not rotate with the screw conveyorblade is the weight of the material itself and the frictional resistance of thescrew conveyor housing to the material. Screw conveyor on the rotating shaft ofthe spiral wound, the blade surface type according to the different materialsare solid surface, belt type, leaf surface type and other types. The screw shaftof the screw conveyor has a thrust bearing at the end of the direction ofmovement of the material to the axial reaction force of the screw with thematerial. When the length of the screw is longer, the bearing should besuspended. Is a mineral, feed, grain and oil, the construction industry in awider range of transportation equipment, made of steel, for the transmission ofhigh temperature powder or solid particles and other chemical, buildingmaterials.

The classification of screw conveyor

Screw conveyor from the direction oftransport material division, divided into horizontal screw conveyor andvertical screw conveyor two types.

Screw conveyor according to thecharacteristics of the transport material requirements and structure can bedivided into horizontal screw conveyor, vertical screw conveyor, flexible screwconveyor, spiral (roller conveyor) conveyor.

(1) Vertical screw conveyor

The speed of the spiral of the verticalscrew conveyor is higher than that of the conventional screw conveyor, and theadded material produces a frictional force between the shell and the frictionforce, which prevents the material from rotating with the spiral blade andovercomes the material drop of gravity, thus achieving the vertical transportof materials. The machine transport volume is small, the transmission height issmall, the speed is higher, and the energy consumption is big. Particularlysuitable for conveying fluidized powdery granular material, mainly used toenhance the material, lifting height is generally not greater than 8 meters.

(2) Horizontal screw conveyor When thematerial is added to the fixed tank, due to the gravity of the material and thefriction between the role of the machine, the material deposited in the lowerpart of the machine does not rotate with the spiral body, but only in therotation of the spiral blade to move forward, as the non-rotating nut along therotation of the screw as a translational movement, to achieve the purpose ofconveying materials.

(3) Spiral tube (roller conveyor) Conveyor

The spiral tube is a continuous spiral blade in a cylindrical housing that rotates together with the spiral blade. Theaddition of the material due to the role of centrifugal force and frictiontogether with the shell rotation and be promoted, under the action of thegravity of the material and then along the spiral surface, so that the materialwith the spiral tube rotation together to achieve the material forwardmovement, as does not rotate of the screw along the rotation of the nut as atranslational movement, to achieve the purpose of conveying materials.


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