Screw conveyor is a continuous conveying machine used for conveying bulk materials horizontally or vertically in short distances. According to its structural characteristics and performance, screw conveyors are usually used for material transportation during the production process of grain, oil and feed processing plants. The screw conveyor is a machine that uses a motor to drive the screw to rotate and push the material to achieve the purpose of conveying. It can be transported horizontally, obliquely or vertically. The screw conveyor is divided into two types: shaft screw conveyor and shaftless screw conveyor. In appearance, it is divided into U-shaped screw conveyor and tubular screw conveyor. The shaft screw conveyor is suitable for non-sticky dry powder materials and small particle materials.
According to the installation form, the screw conveyor can be divided into fixed and mobile type, according to the conveying direction or working speed can be divided into two types of horizontal slow speed and vertical fast, the more commonly used in engineering practice are fixed, horizontal slow speed screw conveyor.
1.The structure is relatively simple and the cost is low.
2.Reliable work and easy maintenance and management.
3.Compact size, small cross-section and small footprint.
4.It can realize sealed transportation, which is conducive to conveying easy-to-fly, hot and irritating materials, reducing environmental pollution and improving the working conditions of port workers.
5.It is convenient to load and unload. The horizontal screw conveyor can be loaded and unloaded at any point on its conveying line; the vertical screw conveyor can be equipped with a relatively high retracting performance with respect to the screw feeder.
6.It can be transported in reverse direction, and it can also make a conveyor convey materials in two directions at the same time, that is, to the center or away from the center.
|Model||Power (KW)||Capacity (T/H)|
When the screw shaft rotates, due to the gravity of the material and the friction generated by the wall of the tank, the material can only move forward along the bottom of the conveyor under the pushing of the blade, and the situation seems to be that the nut can not be rotated. The rotating screw acts as a translational motion. The movement of the material in the intermediate bearing is based on the thrust of the material moving forward. Therefore, the transport of materials in the conveyor is completely a slip motion. In order to make the screw shaft in a more favorable tension state, the driving device and the discharge port are generally placed at the same end of the conveyor, and the feed port is placed as close as possible to the tail of the other end. The rotating spiral blade conveys the material and the force of the material not rotating together with the screw conveyor blade is the weight of the material itself and the frictional resistance of the screw conveyor casing to the material. The shape of the blade has a solid surface type, a belt surface type, a blade surface type and the like depending on the material 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.