There are great differences between the two types of transport aircraft, both in construction and shape

Second, structure classification and working principle of belt conveyor structure is diverse, there are trough belt machine, flat belt machine, climbing belt machine, side tilt belt machine, turning belt machine and other forms. Belt conveyor is mainly composed of frame, conveyor belt, belt roller, tensioning device, transmission device, etc. The working principle of belt conveyor is that the conveyor belt supported by the upper and lower rollers as a bearing component and traction component bypassing the head and tail rollers to form a closed loop conveying machinery, which transmits power by means of the friction between the driving roller and the conveyor belt to achieve material conveying. Can be used for horizontal, tilt up, tilt down conveying materials. The screw conveyor is divided into two kinds of shaft screw conveyor and shaftless screw conveyor in transportation form, and is divided into U-type screw conveyor and tube screw conveyor in appearance. Shaftless screw conveyor is suitable for non-viscous dry powder materials and small particle materials (such as cement, fly ash, lime, grain, etc.) while shaftless screw conveyor is suitable for conveying viscous and easily wound materials. (such as: sludge, biomass, garbage, etc.) The working principle of the screw conveyor is that the rotating screw blade will push the material and carry out the screw conveyor transport, so that the material does not rotate with the screw conveyor blade is the material's own weight and the friction resistance of the screw conveyor shell to the material. The spiral blade welded on the rotating shaft of the screw conveyor has solid surface type, belt surface type, blade surface type and other types according to the different conveying materials. The screw shaft of the screw conveyor has a thrust bearing at the end of the direction of material movement to react with the axial force of the material to the screw. When the captain is long, the middle hanging bearing should be added.

Three, the advantages and disadvantages of the two belt conveyor has: long transport distance; Large conveying capacity; Simple structure, less infrastructure investment, low operating costs; The transmission line can be arranged horizontally, inclined, or curved in the horizontal direction and vertical direction, so it is less restricted by terrain conditions. Simple operation, easy to achieve automatic control and other advantages. The disadvantage is that the tape is vulnerable to wear, the slope can not be too large, the friction is large, and the equipment cost is large. Screw conveyor has: simple structure, small cross-section size, good sealing, reliable work, low manufacturing cost, easy to intermediate loading and unloading, conveying direction can be reversed, but also to the opposite two directions at the same time. During the conveying process, the material can also be stirred, mixed, heated and cooled. Material flow can be adjusted through loading and unloading gates. However, it is not suitable to transport easily metamorphic, viscous, easy to caking and large materials. However, in the conveying process, the material is easy to break, and the screw and groove are easy to wear. The unit power is large. In use, it is necessary to maintain the tightness of the tank and the appropriate gap between the spiral and the tank.