Several conveying methods of screw conveyor

2012-04-17 08:15:43 There are several conveying methods of screw conveyors, which are equipment that conveys materials by spiral rotation. They can be divided into three conveying methods: centrifugal induction method, pushing method and gravity sliding method. The centrifugal induction type is used for spiral conveyors with steep vertical slopes or higher speeds. Its working characteristic is that the filling amount of materials is between two types. Under the high speed of the spiral, the loose material is far affected by the centrifugal force. It has greater influence than other external forces such as gravity. The push type is used for the unloading and conveying screw at the bottom of the silo. The materials are often filled with spirals, and the static pressure of the granular materials is relatively large. The gravity of each material is much smaller than other forces. The resistance of this kind of spiral is very large, and it has to overcome the friction formed under greater pressure. When working, the material seems to be a nut, and the screw acts like a screw. As long as the nut does not roll, the rotation of the screw can make the nut move in the axial direction. The discharge screw at the bottom of the silo often uses a variable-pitch screw. The distance is larger. The speed of the gravity sliding screw is low, and the material on the screw surface is more affected by gravity than the centrifugal force. Because the rolling material of the screw continues to slide down the spiral surface, the axial displacement occurs. The cx screw machine basically It belongs to this principle. The filling factor value of the screw machine based on this principle is generally less than 05. Due to excessive filling, the material does not slide down along the spiral surface, but is agitated by the spiral to make it fall over the spiral shaft, and a large axial velocity cannot be obtained. Since materials with slow spirals are greatly affected by gravity, obviously it cannot be used for vertical spirals or upward transportation with a large inclination angle. The sliding-down method principle has low conveying capacity, but the material is in a light and loose free-rolling state, and is less squeezed. It is suitable for materials that are easy to agglomerate and have high abrasiveness. When the standard spiral is used, it can not only maintain a faster sliding speed, but also has a certain adaptability to inclined conveying.

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