INTRODUCTION
Screw conveyor is a kind of screw conveyor, suitable for small-scale operation, stable transportation, can play a good role in the case of limited transportation site. Good sealing performance, it has great advantages for the occasions with large dust and environmental requirements, which can avoid the occurrence of dust in the transportation process.
Working Principle
The rotating spiral blade moves the material and carries on the screw conveyor transportation. The force that makes the material not rotate with the screw conveyor blade is the material weight and the friction resistance of the screw conveyor shell to the material. For spiral blades welded on the rotating shaft of screw conveyor, the surface types of blades include solid surface, belt surface, blade surface, etc. A thrust bearing is provided at the end of the screw shaft of the screw conveyor in the direction of material movement to give the axial reaction force to the screw along with the material. When the length of the machine is long, the middle hanging bearing should be added.
Screw conveyor is generally composed of conveyor body, inlet and outlet and driving device;
Spiral blade of screw conveyor has three forms: solid spiral surface, belt spiral surface and blade spiral surface. Among them, blade type spiral surface is relatively less used, mainly used for conveying materials with high viscosity and compressibility. This kind of screw suspension surface has and completes the functions of mixing and mixing materials in the process of conveying operation.
Compared with other screw conveyor, the conveyor has the advantages of small cross-section, reliable operation, smooth operation and easy maintenance.
Characteristic
It has the advantages of simple structure, small cross-section size, good sealing performance, reliable operation and low manufacturing cost. It is convenient for intermediate loading and unloading. The conveying direction can be reversed or two opposite directions at the same time.
During transportation, materials can also be stirred, mixed, heated and cooled. The material flow can be adjusted through the loading and unloading gate.
However, it is not suitable to transport materials that are easy to deteriorate, sticky, caking and bulky. During the conveying process, the materials are easy to be broken, and the screw and trough are easy to wear. The unit power is larger. In use, it is necessary to keep the tightness of the material groove and to keep a proper gap between the screw and the material groove.
