Structure & Working Principle of Screw Conveyor

The screw conveyor uses the motor to drive the screw to rotate, moving the material to achieve horizontal, inclined or vertical transport, in the material movement direction of the end of the thrust bearing with the material to screw axial reaction, in the long time, the middle hanging bearing should be added.

Structure of the Screw Conveyor:

Screw conveyor in the form of conveying is divided into shaft screw conveyor and shaftless screw conveyor. Axial screw conveyor is composed of screw, U type material slot, cover plate, inlet, outlet and drive device. Axialless screw conveyor is changed to shaftless screw, and in U groove device has replaceable lining body, material is input by feed port and output by outlet after screw push, the whole transmission process can be carried out in a sealed slot.

Spiral blade welded on rotating shaft of screw conveyor, the surface type of blade according to the different conveying materials have solid surface type, belt surface type, one-sided type of blade.

Working Principle of Screw Conveyor:

When the screw shaft of the conveyor rotates, the material can only move forward along the bottom of the conveyor’s groove under the push of the blade because of the gravity of the material and the friction force generated with the groove wall, as if the nut that can not be rotated forward along the rotating screw. The movement of the material in the middle bearing depends on the thrust of the material moving forward behind it. This process needs continuous material feed into the screw conveyor from the inlet port.

In this regard, the delivery of materials in the screw conveyor, is a type of slip motion. In order to keep the screw shaft in a pull state, the drive device and the discharge port are generally placed at the same end of the conveyor to achieve this target, while the feed inlet port is placed as far as possible near the tail of the other end. The rotating screw blade carries the material through, so that the material does not rotate with the screw conveyor blade is the weight of the material itself and the friction resistance of the screw conveyor housing to the material.

GN produces screw conveyors of different capacities, ranging from 15 ton/h to 55 ton/h. At the same time, we can also produce the machine in a customized way to meet clients requirements.

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