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Spiral blade

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What is screw conveyor?

2020-04-24
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Screw conveyor is a kind of machine which uses motor to drive screw to rotate move materials to achieve the purpose of transportation. It can be transported horizontally, obliquely vertically with simple structure, small cross-sectional area, good sealing performance, simple operation, easy maintenance convenient closed transportation. Screw conveyor is divided into shaft screw conveyor shaftless screw conveyor according to the conveying form, it is also divided into U-shaped screw conveyor tubular screw conveyor the appearance. Shaft screw conveyor is suitable for non viscous dry powder materials small particle materials. (e.g. cement, fly ash, lime, grain, etc.) shaftless screw conveyors are suitable for conveyors made of sticky easily tangled materials. (for example: sludge, biomass, garbage, etc.) the working principle of screw conveyor is that the rotating screw blade pushes the material to the screw conveyor, so that the material does rotate with the screw conveyor blade. Force is the weight of the material itself. Friction resistance of screw conveyor shell to material. The spiral blade is welded on the rotating shaft of the screw conveyor. The surface shape of the blade has solid surface shape, belt surface shape, blade surface shape other types according to the different materials to be transported. The screw shaft of the screw conveyor has a thrust bearing at the end of the material moving direction to provide the axial reaction force between the screw the material. When the captain is long, the middle suspension bearing should be added.

Screw conveyor development is divided into two types of development process: belt shaft screw conveyor shaftless screw conveyor. Shaft screw conveyor is composed of screw, U-shaped groove, cover plate, water inlet outlet driving device. Generally, there are three types: horizontal, inclined vertical. It is a shaftless screw with a replaceable bushing installed in a U-groove. The structure is simple. The material is imported the inlet, pushed out in a spiral shape, then exported the outlet. The whole transmission process can be carried out in the sealed groove. Generally speaking, the screw conveyor we usually refer to is the screw conveyor with shaft.

For many difficult to transport materials, people have been looking for a reliable conveying method, shaftless screw conveyor is a better solution.

Since the mid-17th century, aerial ropeways have been used to transport bulk materials. In 1887, the screw conveyor was invented by Archimedes. Later, it was improved widely used in industry to transport bulk solid materials. With the development of time, gradually developed a series of screw conveyor, which has made great progress in screw conveyor.

GX screw conveyor is a kind of earlier screw conveyor, also the earliest general equipment in China. It is mainly used for conveying powdery, granular small materials, suitable for conveying degradable, viscous easily agglomerated materials large materials, because these materials are easy to stick on the screw rotate with it, this situation will occur at the suspension bearing when the materials are blocked, which brings great inconvenience to the material transportation process. The main advantages of GX screw conveyor are energy saving significant reduction of energy consumption. The head tail bearings move outside the shell, with the characteristics of good dust-proof sealing, low noise, strong adaptability, convenient operation maintenance, flexible inlet outlet positions, etc.; the disadvantages are high power consumption, rapid wear of machine parts materials in transportation, serious crushing.

Ls type screw conveyor is a new generation of screw conveyor based on GX type conveyor. Ls type screw conveyor has the characteristics of novel structure, reliable performance, advanced technical index, wide range of application, great energy saving consumption reduction.

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