In the process of selecting the screw conveyor, we should choose the appropriate screw conveyor model and materials according to the characteristics of the conveyed materials, the requirements of conveying capacity and the working environment. You can't choose a conveyor only by price, and you can't pursue a large conveying capacity and ignore the actual demand, resulting in waste:

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Matters needing attention in selecting screw conveyor:

1. Conveying capacity: The conveying capacity of the screw conveyor refers to the amount of materials transported in unit time. When transporting bulk materials, it is calculated according to the mass or volume of the materials transported per hour; When transporting finished products, it is calculated according to the number of pieces transported per hour. When matched with vibrating screen equipment such as linear vibrating screen, rotary vibrating screen and ultrasonic vibrating screen, the feeding amount of vibrating screen should be calculated and the conveying amount should be controlled. Most conveyors should consider whether they are matched with other production equipment before design and production, so as to design conveyor models reasonably.

2. Conveying length and inclination: The length and inclination of the conveying line directly affect the total resistance and required power of the conveyor. At present, there are many types of conveyors, some of which feed directly in parallel, and some of which have a certain inclination, so these situations should be explained when choosing screw conveyors.

3. Conveying speed: The conveying speed directly affects the conveying capacity. When the conveyor belt is used as a traction component and the conveying length is long, the conveying speed is increasing day by day. However, high-speed conveyor should pay attention to vibration, noise, starting and braking. For the conveyor with chain as traction component, the conveying speed should not be too high to avoid increasing the power load. At the same time, the conveying speed of the feeder with process control should be determined according to the production process requirements.

4. Component size: The component size of the conveyor includes the conveyor diameter size, hopper volume, blade spacing and container size. The size of these components directly affects the conveying capacity of the screw conveyor.

5. Whether there is a hopper at the entrance and the size of the hopper.

6. The motor of the screw conveyor can choose speed regulating motor and common motor to control the conveying speed and the conveying capacity per hour. Can put forward special requirements, such as explosion-proof, brand, etc.

Select calculation method:

(1) calculation of transportation capacity: q = 47d2ntπ rhoc (t/h)

? Where: d-spiral diameter (m)? N-speed of screw shaft (rpm)? T-pitch (m)？ ρ—Bulk density of materials (t/m3)? ψ—Material filling coefficient? C-inclination coefficient (when horizontal, C= 1)

Materials (flour, grain, etc.) take ψ = 0.45. ) basically no wear; For materials with less wear (sand, cement, etc.). ), take ψ = 0.33; Materials (slag, etc.) shall be ψ=0. 15. ) Very durable.

(2) Power calculation: p = P0/(0.8 ~ 0.9) (kW) P0 = Q (ω 0l+h)/367+DL/20 (kW).

Where: d- screw diameter (m)q- conveying capacity (t/h)? ω0- drag coefficient? L- transport length (m)? H —— Vertical height in inclined arrangement (m)

(3) the relationship between the minimum spiral diameter and the particle size of the material

For conveying bulk materials, unsorted materials: d ≥( 8 ~ 10)d- average particle size of materials (㎜)? Sorted materials: d ≥( 4 ~ 6)dk- the largest material block.

Friendly reminder: Screw conveyors must buy products from regular manufacturers, and product quality and after-sales service can be guaranteed.