Shaftless Screw Conveyor

The shaftless screw conveyor consists of a shaftless screw, a U-shaped groove cover plate, inlet and outlet ports, and a driving device. The U-shaped groove is equipped with a replaceable lining body and has a simple structure. The materials are input from the source and output through the outlet after being pushed by a screw. The entire process can be carried out in a sealed groove, reducing noise. It is mainly used for conveying materials with high viscosity and compressibility. During the conveying process, stirring, mixing and other processes are completed simultaneously. Its spiral pitch is about 1.2 times the diameter of the spiral blades.

Characteristics of shaftless screw conveyor:

Compared with traditional shaft screw conveyors, shaftless screw conveyors have the following outstanding advantages due to the use of a centerless shaft and suspended bearing design, and the use of a flexible integral steel screw to push materials:

1. Spiral has good performance and practicality, and a long service life.

2. Strong resistance to entanglement: without central axis interference, it has special advantages for conveying belt like and easily entangled materials, preventing blockage and accidents.

3. Good environmental performance: Adopting fully enclosed conveying and easy to clean spiral surface, it can protect environmental hygiene and prevent the conveyed materials from pollution and leakage.

4. Large torque and low energy consumption: Due to the lack of a shaft in the spiral and the difficulty of material blockage, it can operate at lower speeds, achieve smooth transmission, and reduce energy consumption.

5. Large conveying capacity: The conveying capacity is 1.5 times that of traditional shaft conveyors with the same diameter, up to 40m3/h. The conveying distance is long, up to 25 meters, and can be installed in a multi-stage series according to user needs for long-distance material conveying.

6. Compact structure, easy operation, economical and practical, with minimal maintenance and low maintenance costs.

Structure of shaftless screw conveyor:

This product mainly consists of a drive device, head assembly, casing, shaftless spiral body, groove lining plate, feed port, discharge port, machine cover (if needed), base, etc.

1. Drive device: Adopting cycloidal pinwheel reducer or shaft mounted hard tooth surface gear reducer, the drive device should be designed to be located at the discharge port end as much as possible, so that the spiral body is in a tensile state during operation.

2. The head is equipped with thrust bearings that can withstand the axial force generated during material transportation.

3. Chassis: The chassis is U-shaped or O-shaped, with a rainproof cover on the top, made of stainless steel, carbon steel, or fiberglass.

4. Axial free spiral body: made of stainless steel or carbon steel.

5. Tank lining plate: made of wear-resistant (based on actual reports) plastic, rubber, or cast stone plates.

6. Inlet and outlet: There are two types: square and circular. Generally, the form of inlet and outlet is determined by the user.