screw conveyor

[′skrü kən′vā·ər]

(mechanical engineering)

A conveyor consisting of a helical screw that rotates upon a single shaft within a stationary trough or casing, and which can move bulk material along a horizontal, inclined, or vertical plane. Also known as auger conveyor; spiral conveyor; worm conveyor.

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Screw Conveyor

a mechanism whose working member is a shaft with a continuous helical blade (the screw) or individual, pitched vanes. The rotating shaft, housed in a horizontal or inclined trough, moves loose or small piece cargoes or liquids along the trough. Screw conveyors are used in extruders, feeders, and other machines. They offer design simplicity and even feeding, but they have low productivity and efficiency because of the friction of the material against the walls. Feeding is regulated by the frequency of rotation of the screw. A screw conveyor was used in Archimedes’ screw, a device designed to raise water. Screw conveyors in which the screws of two adjacent machines rotate in opposite directions are used to mix materials.

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References in periodicals archive

A screw conveyor and airlock are used at the bottom hopper of the pulse-jet dust collector to remove the dust collected on the bags.

Foundry meets OSHA silica PEL with dry venting

The screw conveyor presented the highest variability at a speed of 8 km [h.sup.-1], due to special causes.

Can combine headers and travel speeds affect the quality of soybean harvesting operations?/Plataformas de corte e velocidades podem afetar a qualidade da operacao de colheita de soja?

A tilt-down flexible screw conveyor on a caster-mounted frame, which mates with the bulk bag filler's base frame, can be maneuvered through narrow aisles and around corners.

Flexicon's mobile Bulk Bag filler has tilt-down feeder

Bulk handling specialist Flexicon Europe has introduced a new Mobile Half-Frame Bulk Bag Unloader that integrates a multipurpose hopper with a flexible screw conveyor to create a unit that can improve plant efficiency by easy re-positioning to accommodate alternative bulk delivery stations as well as manual sack discharge.

Mobile bulk bag discharger from Flexicon

The product includes a hopper, which is equipped with a hinged lid, feeds a flexible screw conveyor that transports bulk ingredients ranging from sub-micron powders to large pellets.

Bulk Conveyor Fits Through Tight Spaces

Greek mathematician and physicist Archimedes is acknowledged as the inventor of the screw conveyor in 235 to 240 B.C., and essentially his design has not changed since then.

Selecting a conveyor for your waste facility

Precise control of earth pressure is possible via operator control of the cutterhead, jacking speed and screw conveyor operation.

Akkerman

The bag dump station consists of a hopper, a dust collector, and a flexible screw conveyor.

Lighter than air

In the automatic mode, the unloading system receives an input signal from the customer's mixer that simultaneously starts NBE's Bridgbuster massage paddles, transition hopper's mechanical agitator, and incline helical screw conveyor. Once the targeted batch weight has been reached, the above options are automatically stopped.

Unloading system

The SM-Shaftmount is available with an optional integral backstop clutch, CEMA screw conveyor kits and a unique two-way motor mount.

Geared to save you money: SM-Cyclo's products are designed with efficiency in mind. (Corporate Profile)