How to choose blade size and type for screw conveyor

Spiral conveyor blades can generally be divided into solid blades, hollow blades, and shaftless blades. Today, the editor will analyze in detail the structural form and selection method of the blades to avoid the manufacturer's pitfalls.

Classification of Spiral Conveyor Blades

Spiral conveyor blades can generally be divided into the following categories:

1. Solid blade: The blade is a single piece with a simple structure, suitable for conveying materials such as cement, sand, etc.

2. Hollow blade: The middle of the blade is empty and lightweight, which can be used to transport loose materials such as grain, coal, etc.

3. Axial free blade: The upper and lower ends of the blade are circular rings, and the angle of the blade can be adjusted, suitable for situations where there are various materials such as miscellaneous materials in the production process.

The second is the analysis of the blade structure of the screw conveyor

The main structures of spiral conveyor blades include diameter, thickness, pitch, angle, etc.

1. Blade diameter

The blade diameter refers to the outer diameter of the blade, which is related to factors such as the quantity, density, and conveying speed of the conveyed material. Usually, the diameter of the blade can be determined based on the conveying capacity of the material and calculated through test data.

2. Leaf thickness

Blade thickness refers to the thickness of the blade, and its size directly affects the strength and service life of the blade. In the actual production process, the thickness of the blades is generally selected based on the type of material and conveying capacity to achieve the desired level and service life of the blades.

3. Blade pitch

The blade pitch refers to the distance between adjacent blades and plays an important role in the operation of a screw conveyor. A pitch that is too small can prevent materials from being discharged from the screw conveyor, while a pitch that is too large can reduce conveying efficiency. Therefore, the size of the pitch needs to be determined based on the properties of the conveyed material and the conveying volume.

4. Blade angle

The angle of the blade refers to the angle between the blade and the coaxial axis. When transporting materials, the angle of the blades will affect the speed and quantity of material transportation. Under normal circumstances, the angle of the blades is determined according to actual needs.

The third is to choose the blade size of the screw conveyor reasonably.

The size selection of spiral conveyor blades needs to consider various factors such as material properties, conveying speed, conveying capacity, conveying distance, machine specifications, and service life. Here are some details to pay attention to:

1. Properties of materials

Different materials have physical and chemical properties, such as viscosity, humidity, density, etc. Choosing the appropriate blade size based on the different properties of the material can avoid transportation difficulties caused by the material being too wet or too dry.

2. Conveying speed and conveying volume

The conveying speed and amount are important factors in selecting the appropriate blade size. If the conveying speed and conveying volume are too high, it is necessary to choose blades with high degree; Otherwise, you need to choose the leaves.

3. Transport distance

The transportation distance determines the stiffness and load-bearing capacity of the blades. Long distance transportation requires the selection of longer blades to increase their stiffness and ensure stable operation.

4. Machine specifications and service life

The specifications and service life of the machine also have a significant impact on the selection of blade size. For larger screw conveyors, it is necessary to choose larger blade sizes to carry the load.

In summary, choosing the appropriate blade size for a screw conveyor can improve equipment efficiency and service life, while reducing failure and maintenance costs.

IV. Conclusion

Spiral conveyor is a common conveying equipment, and its blades are one of the main components. Reasonable blade structure design and size selection can enable the operation of screw conveyors. When selecting blade size, it is necessary to comprehensively consider the properties of the material, conveying speed, conveying capacity, conveying distance, and machine specifications. Therefore, in the design and application of screw conveyors, attention should be paid to the analysis of blades and the reasonable selection of sizes.