The screw conveyor uses a rotating spiral to transport the material through a fixed outer casing. There are three types of horizontal type, inclined type and vertical type, and U-shaped housing is used as the carrier. It is suitable for the transportation of fruits and vegetables and pomace. It has the advantages of small footprint, low noise and convenient use.

In the screw conveyor, it can be divided into two types: the shaftless screw conveyor and the shaft screw conveyor. Although they are all screw conveyors, they are still somewhat different, so today we will explain between the two screw conveyors. The difference so that everyone can make a good distinction.

In design, the shaftless screw conveyor adopts a non-central shaft design, which uses a steel spiral with a certain flexibility to push the material, so it can transport some materials that can not be conveyed by the shaft screw conveyor, such as Granular materials, mild paste materials, semi-fluid and viscous materials, as well as easily entangled and clogged materials, which are characterized by:

(1) Strong anti-winding, no interference from the central axis;

(2) If the belt-like and easily entangled materials are conveyed, it has a strong superiority.

The shaft screw conveyor uses a screw to push the material in the casing to realize the conveyance. The suspension bearing is a sliding bearing and is provided with a dustproof sealing device, and the hanging shaft and the screw shaft are carried out through the slider. Connections, compared to shaftless screw conveyors, have the following advantages:

(1) The bearing capacity is larger than that without shaft, and the use is safe and reliable;

(2) It has strong adaptability and is easy to install and maintain;

(3) The machine is small in volume and relatively high in speed, which can realize fast and uniform transportation;

(4) There is generally a cleaning device at the discharge end, and the inlet and outlet ports can be flexibly arranged;

(5) The machine runs with low noise, good sealing performance and good rigidity.