Conveyors
Introduction
A screw conveyor or worm conveyor is a mechanism that uses a rotating helical screw blade, usually within a tube, to move liquid or granular materials. They are used in many bulk material handling industries. Screw conveyors in modern industry are often used horizontally or with a slight inclination as an efficient way to move semi-solid materials, including food waste, wood chips, aggregates, cereal grains, animal feed, boiler ash, meat and bone meal, municipal solid waste), and many others. The first type of screw conveyor was the Archimedean screw, used since ancient times to pump irrigation water.[1].
They usually consist of a trough or tube containing a spiral blade wound around an axis, driven at one end and clamped at the other, or a "shaftless spiral", driven at one end and free at the other. The speed of volume transfer is proportional to the speed of rotation of the shaft. In industrial control applications, the device is often used as a variable rate feeder, varying the rate of rotation of the shaft to deliver a measured rate or amount of material into a process.[2].
Screw conveyors can operate with material flow inclined upward. When space permits, this is a very economical method of lifting and transporting. As the tilt angle increases, the capacity of a given unit decreases rapidly.
The rotating part of the conveyor is sometimes simply called hole&action=edit&redlink=1 "Auger (drill) (not yet drafted)").
in agriculture
The "grain auger" is used in agriculture to move grain from trucks, grain bins or grain trailers to grain storage bins (from where it is subsequently removed via bottom gravity hoppers). A grain auger can be driven by an electric motor; a tractor, through the power take-off"); or sometimes an internal combustion engine mounted on the auger. The propeller rotates inside a long metal tube, moving the grain upward. At the lower end, a hopper receives the grain from the truck or grain cart. A ramp at the upper end guides the grain to the destination.[2].
The modern grain auger in today's farming communities was invented by Peter Pakosh. His grain drive employed a screw-type auger with a minimum of moving parts, an entirely new application for this specific use. At Massey Harris (later Massey Ferguson), the young Pakosh approached the design department in the 1940s with his idea for the auger, but was scolded and told that his idea was unimaginable and that, once the auger If it aged and bent, metal on metal, according to a Massey design manager, would "cause fires across Canada". modern grain augers.