The development of screw conveyor is divided into the development process of two types of axial screw conveyor and axial screw conveyor . Axial screw conveyor consists of screw, U-shaped material trough, cover plate, inlet and outlet and driving device, and generally horizontal type, tilt type and vertical type three; without axial conveyor, the screw is changed to no axis spiral, and in U-groove the device has a removable lining, the structure is simple, the material is fed by the feed inlet through the screw-driven output from the discharging port. The entire transmission process can be carried out in a sealed groove. Generally speaking, we usually refer to the screw conveyor refers to the axis-type screw conveyor.
For many difficult materials, people have been looking for a reliable way to transport, and the axis-free screw conveyor is a better solution .
From the middle of 17th century, the beginning of the application of aerial ropeway transportation of bulk materials, to 1887, spiral conveyor by Archimedes invented, and later improved, widely used in industry to transport bulk, solid materials, and then after a long period of development process, gradually developed a series of screw conveyor, The screw conveyor has made great progress.
GX-type screw conveyor is a kind of screw conveyor, which is the earliest production equipment in China. It transports powdery, granular, small block materials mainly, not suitable for conveying perishable, viscous easily caking materials and large chunks of materials, because these materials easy to stick on the spiral and with the rotation, or in the hanging bearing place to produce plugging phenomenon, to the material transport process brought great inconvenience. The advantages of GX-type screw conveyor are mainly energy saving, significantly reduce consumption, the head, tail bearings moved to the shell, with good dust sealing, low noise, adaptable, easy operation and maintenance, feeding and discharging the location of the mouth flexible, etc. the disadvantage is the power consumption is big, the mechanical wear is fast, the material is crushed seriously during transportation.
LS-type screw conveyor is a new generation screw conveyor based on GX type conveyor, the LS-type screw conveyor is characterized by novel structure, reliable performance, advanced technical Index, wide application range and significant energy saving and consumption reduction.