Screw Conveyor

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Related to Screw Conveyor: flight conveyor, chain conveyor, auger conveyor

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.

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.

References in periodicals archive ?
NORD screw conveyor drive options feature a Unicase reducer housing, Quadrilip reducer shaft sealing and optional high capacity output bearings with CEMA standard flange mounting and CEMA drive shafts ranging from 1-1/2 in.
57 m) long Model 1450 flexible screw conveyor, designed to handle difficult materials and consisting of a flexible steel screw rotating inside a 4.
During discharge the integral Flexicon screw conveyor transfers material to downstream processes and storage vessels.
It became obvious that a flexible screw conveyor was a simple, direct system for our needs.
The Hapman three-inch-diametre screw conveyor is 96 inches in length and is powered by a TEFC one-horsepower motor with a right-angle drive.
Highlights of his design include a new twin-tapered bushing system, gear case design (three patentable features), and screw conveyor driveshaft mounting and sealing systems.
Tenders are invited for screw conveyor body with liners for ball tube mills type BBD-4760
NBE flexible screw conveyor gear drives and motors are specified to ensure optimal output torque and motor horsepower--a combination bringing optimal power and conveying efficiency to the application.
Sanitary tilt-down flexible screw conveyor on a caster-mounted frame can be maneuvered through narrow aisles and around corners.
A bag dumping system with glove box, bag compactor and flexible screw conveyor isolates bulk material from the operator and plant environment throughout opening, dumping and compaction of bags, and the conveying of material downstream.
Often the bulk bag discharge will deliver into a hopper fitted with a flexible screw conveyor, and this was also exhibited by Flexicon at Gulfood.
The 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