The spiral blade rotating by the screw conveyor conveys the material and carries the screw conveyor, so that the force of the material not rotating together with the screw conveyor blade is the weight of the material itself and the friction resistance of the screw conveyor casing to the material. The spiral blade welded on the rotating shaft of the screw conveyor has a solid surface type, a belt surface type, a blade surface type and the like according to different materials to be conveyed. The screw shaft of the screw conveyor has a thrust bearing at the end of the material moving direction to give the axial reaction force of the spiral with the material. When the length of the machine is long, the intermediate hanging bearing should be added. First, the working principle of the screw conveyor The utility model has the advantages of simple structure, small cross-sectional dimension, good sealing performance, reliable work, low manufacturing cost, convenient intermediate loading and unloading, reversible conveying direction, and simultaneous conveying in opposite directions. The material can also be stirred, mixed, heated and cooled during the conveying process. The material flow can be adjusted by loading and unloading the gate. However, it is not advisable to transport materials that are prone to deterioration, viscous, agglomerate and bulk. The material is easily broken during the conveying process, and the spiral and the trough are easy to wear. The unit power is large. In use, the tightness of the trough should be maintained and there should be a proper gap between the spiral and the trough. Second, the application of screw conveyor Divided from the angle of the direction of transport material, the screw conveyor is divided into two types: horizontal screw conveyor and vertical screw conveyor. It is mainly used for horizontal conveying of various loose materials such as powder, granule and small block. And vertical lifting, the machine is not suitable for conveying special materials that are easy to deteriorate, sticky, easy to agglomerate or high temperature, afraid of pressure, and more corrosive. Screw conveyor is a continuous conveying equipment widely used in metallurgy, building materials, chemical, grain and mechanical processing departments. Third, the characteristics of the screw conveyor The vertical screw conveyor is suitable for short distance vertical conveying. The spiral of the flexible screw conveyor consists of a flexible shaft and a synthetic rubber blade, which is easy to bend and can be arbitrarily arranged according to site or process requirements for space transportation. The spiral conveyor blades have the current pull type and the whole pull loss. The current pull type can be made into any thickness and size. The whole pull type is not suitable for making non-standard spirals. It is convenient to install and maintain. The screw conveyor is commonly called auger. It is a kind of conveying equipment widely used in minerals, feed, grain and oil, construction industry. It is divided into horizontal screw conveyors and angles from the angle of displacement of conveying materials. There are two types of vertical screw conveyors, which are mainly used for horizontal conveying and vertical lifting of various loose materials such as powder, granules and small blocks.