Screw Conveyor

SL Shaftless screw conveyor offer a larger volume capacity and the possibility of handling particularly difficult materials like those that tend to become tangled up or those that present highly variable particle size. It is not interfered by the central axis, used to transport grid removed from sewage screening device and dewatered sludge mud.
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Description
Overview

 

The screw conveyor is a conveying device that pushes materials along the axial direction through rotating spiral blades. Its core components include a drive device, spiral shaft, blades, and sealed trough. It is widely used in chemical, agricultural, construction, environmental protection, and other fields to convey powder, granular, and small block materials.

 

Features

 

High conveying efficiency
The screw conveyor can achieve efficient material movement through the coordinated design of spiral blade pitch and speed.

  • No central axis interference: The blade directly acts on the inner wall of the trough, and the volume utilization rate is increased by about 20%, which is especially suitable for materials with uneven particle size or easy entanglement.
  • Fluid mechanics optimization: The blade inclination angle (usually 15°-30°) is matched with the speed (70-140r/min) to form a continuous material flow, and the vertical cement conveying efficiency is 40% higher than that of traditional bucket elevators.

 

Easy installation
The screw conveyor adopts modular components (drive unit, spiral section, trough) to support fast assembly. The shaftless design reduces the number of components by 40%, reduces the need for on-site welding, and adapts to complex site layouts.

 

Strong sealing

  • Structural sealing: Double-layer gaskets are used between the trough cover and the material trough of the screw conveyor, combined with a labyrinth joint to prevent dust leakage effectively.
  • Material adaptation: The wear-resistant/corrosion-resistant liner and blade gap are optimized to prevent material jamming and reduce wear, reducing the risk of leakage.

 

Low-noise operation

  • Shaftless advantage: The shaftless design of the screw conveyor eliminates the bearing friction sound source and reduces the noise level to 65-75 decibels.
  • Shock reduction measures: The base is integrated with a rubber isolator, and the blade adopts a variable cross-section design to reduce vibration.

 

Structure Diagram

 

image001

 

Applications

 

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Chemical Industry
Screw conveyors are often used to transport powdered or granular raw materials. The fully enclosed structure can prevent dust from spilling out and adapt to high temperatures or corrosive environments.

 

Agricultural Field
Screw conveyors are used for horizontal or inclined transportation of bulk materials such as grain and feed. The modular design is easy to integrate with storage equipment to achieve automated loading and unloading.

 

Construction Industry
Screw conveyors are often used in construction sites to transport cement, sand and gravel, and other building materials vertically to high places. The shaftless design reduces the risk of material blockage and adapts to the complex terrain of the construction site.

 

Environmental Protection Field
Screw conveyors are used to transport dewatered sludge, grille slag, and other materials. The fully enclosed structure avoids secondary pollution and supports long-distance inclined or vertical transportation.

 

Parameters

 

Model

WSL-260

WSL-300

WSL-360

WSL-420

Speed (rpm)

18(Horizontal); >18(Inclined)

Capacity (m³/h)

Different angle

0°

3

6

9.5

12

15°

2.1

4.6

6.5

9

30°

1.3

2.6

4.3

5.7

Screw diameter(mm)

220

260

320

380

Conveying length(m)

6

6

6

6

Power (kW)

Reference for conveying length of 6m

1.1

1.5

2.2

3

Installation angle α

≤20° (Special order 20°< α ≤ 30°)

Customization Accepted

 

Product Details

 

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FAQ

 

Q: How to calculate the transport capacity?

A: Calculate the volume per hour needed to be conveyed, this can be done by finding the desired cubic feet per hour, selecting the recommended trough loading percentage for the conveyor, selecting the right screw diameter, and determining drive RPM of the conveyor.
The maximum recommended screw conveyor capacity is often given with each screw diameter and is also affected by the type and size of pitches, as well as the material being transported.

Q: What data needs to be provided before the inquiry?

A: Normally, when an inquiry:
1. Please provide the capacity, screw diameter, pitch, conveying length, installation angle and material height of the conveyor
2. Type of conveying material and the material of the conveyor (Carbon steel and stainless steel).
3. Motor brand and required voltage, frequency, etc.

 

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