Oct. 21, 2024
Machinery
Transport systems are needed in warehouses to transport goods. For this purpose, there are various possibilities for different requirements in conveyor technology. In addition to roller, vibratory and circular conveyors, screw conveyors (also known as Archimedes&#; spiral or conveyor spiral) also belong to the category of continuous conveyors. Continuous conveyors are characterized by the fact that goods are conveyed with a continuously generated transport stream. In a screw conveyor, goods are transported with a rotating screw, often made of steel. They flow through one, often flexible, pipe, from one or more receiving points to one or more delivery points. A screw conveyor transports the corresponding material horizontally, vertically or diagonally over several meters.
The screw conveyor is designed in such a way that a screw conveyor is driven in a trough and the material to be conveyed is fed and discharged at corresponding inlets and outlets. Unlike a spiral conveyor, the screw conveyor has a worm shaft in the middle.
The force of gravity and the friction of the transported goods against the trough walls ensure that the goods do not rotate with the screw conveyor, but are permanently transported further. The effective and also efficient transport depends on the degree of filling, which must not be too high, otherwise the friction on the wall is too low. An important criterion for vertical transport is the speed of rotation, as it generates the necessary centrifugal force that makes friction possible. This requires high speeds of 250 to 400 revolutions per minute (min-1). This is also referred to as the rotation frequency. For comparison: The main rotor of a helicopter usually reaches a speed of 400 min-1, whereas a diesel engine reaches about 5,000 min-1 (source: Wikipedia).
A screw conveyor is a conveyor system which, as mentioned above, transports goods according to the Archimedean screw principle. The image of a conveying system with a flexible screw is to illustrate how a conveying spiral works. The suction pipe of a screw conveyor can be used as a hopper due to its U-shaped loading chute.
The material to be conveyed flows from above into the loading chute through the flexible conveying spiral. The spiral centres itself automatically within the pipe. There is a small gap between the spiral and the pipe wall. In this way, goods can flow through the screw conveyor without damage and grinding or crushing of the material is avoided.
With flexible conveying spirals, goods can be conveyed quickly and evenly at a high speed through a flexible spiral. The screw conveyor is usually driven by a motor. The pipe in which the spiral is located is usually made of plastic or steel. Goods can also be transported in rigid pipes. In contrast to the flexible screw, rigid screws do not have any bending in the pipe. A rigid screw therefore has a reduced flexibility in the use of space.
Continuous conveyors are mechanical, pneumatic and hydraulic conveying systems in which the material to be conveyed is moved continuously, at varying speeds or in cycles along a defined conveying path from feed to discharge point. They are designed to be stationary, mobile or shiftable and are used for conveying bulk material or general cargo.
DIN , T1
During inclined, vertical or horizontal transport, further processing steps such as portioning, mixing, dewatering, compressing, cooling or drying can be applied in parallel. The RPM, the inner and outer diameter, the pitch, the degree of filling and the friction of the conveyed material on the screw determine the flow rate. Their maximum is reached when the friction at the screw conveyor is smaller than the friction at the trough wall.
Important: A decisive factor in the design of a screw is the expected filling level over the process length. The pitch of the screw and the channel depth are the main factors in calculating the filling level; the greater the pitch, the higher the filling level.
Depending on the task and product characteristics, there are single-shaft and twin-shaft screw systems. For continuous mixing and crushing, mainly twin screw conveyors are built. If the vertical, horizontal or inclined conveying path is curved, spiral conveyors are usually used.
Known designs of a screw conveyor are:
Conveying lengths of a few metres are just as much a part of day-to-day operations as are conveying lengths of over sixty metres, which are realised by means of intermediate storage. A special feature is the geometry of extruders and meat grinders. There the helix is constructed in such a way that the cross-section narrows towards the outlet, thus generating high pressures that force rather tough material through templates or into moulds.
Screw conveyors are particularly suitable for conveying liquids, granulates and powders and are used for example in grain silos or in the production of pellets. They also play an important role in the production of plastics, as so-called extruders, at the end of which the plastic pieces are pressed out, in the same way that coarse pieces of meat are processed into minced meat in a mincer.
A screw conveyor is used, for example, to transport so-called bulk material. The screw conveyor is rigid and permanently installed. It consists of rotating screw conveyors that move inside a trough or tube. &#;As a modification of this most used standard version, the screw conveyor can also be designed with double helix, conical helix or helix with variable screw pitch. Special forms are the paddle screw, in which the helix is replaced by individual paddles, the band screw, in which the screw helix is designed as a belt attached to the shaft with webs, and the spiral conveyor, in which the shaft is missing [VDI ]. The bowl feeder is also known in flexible design [Kun-, Sch-a]. Another special design is the screw tube conveyor. In this case, the helix is attached to the delivery pipe, which now rotates*. Screw conveyors are particularly in demand in the plastics industry, food industry and in the building materials industry. This is because they are particularly suitable for the transport of goods that are difficult to transport, such as food or bulk goods.
*Stefan Rakitsch, Dimensionierung und Auslegung stark geneigter Schneckenförderer / Dissertation / Page 2
Teaser image: Chong Fat / gemeinfrei
Archimedic spiral: Author: Silberwolf, Bild-Lizenz: CC-BY-SA-2.5
Also available in Deutsch (German)
Spiral auger conveyor, also known as a spiral conveyor or screw conveyor, is a mechanical conveying system used to move materials in a vertical or inclined direction. It consists of a helical screw blade (auger) enclosed in a tube or trough, which rotates to push materials along the length of the conveyor.
Related links:If you are looking for more details, kindly visit Keefam.
spiral auger conveyor
How the spiral auger conveyor works?
spiral auger conveyor working priciple
The spiral auger conveyor operates by rotating the screw blade, which creates a pushing or pulling action on the material being conveyed. As the screw rotates, it moves the material forward or upward, depending on the design of the conveyor. This type of conveyor is versatile and can handle a wide range of materials, including powders, granules, flakes, and other bulk solids.
Advantages of spiral auger conveyor
1. Versatility: spiral auger conveyors are versatile and can be used in a variety of industries for conveying different types of materials, including agricultural products, food, chemicals, etc.
2, Gentle handling: spiral auger conveyors are known for their gentle handling of materials, making them suitable for fragile or delicate products.
3, Flexible Arrangement: Materials can be transported vertically and inclined, making them ideal for applications that require height variations.
4.Customizable Configurations: These conveyors can be customized for length, diameter, pitch, and material of construction to meet specific material handling requirements.
Applications of spiral auger conveyor
Spiral auger conveyor installation site
1. Agriculture and food processing: In the field of agriculture, spiral auger conveyor is commonly used for conveying agricultural products such as grain, seed and feed. In the food processing industry, it is used to convey powders, granular food ingredients, flavorings, etc.
2&#;Chemical industry: spiral auger conveyor is widely used in the chemical industry to convey chemical raw materials, granules, powders, pigments and other materials for the production process.
3&#;Construction and mining industry: in the field of construction and mining, spiral auger conveyor can be used to convey concrete, stone, sand, ore and other materials to meet the material conveying needs of construction sites or mines.
4&#;Waste treatment: in the equipment used to treat waste and garbage, spiral auger conveyo can be used to convey and treat waste for further treatment or recycling.
5&#;Pharmaceuticals: in the pharmaceutical industry, spiral auger conveyo can be used to convey pharmaceutical raw materials, granular drugs, chemical reagents and other materials to ensure smooth material transportation in the production process.
Spiral auger conveyor customer site
In summary, a spiral auger conveyor is a versatile and efficient material handling solution used in various industries for conveying bulk materials vertically or at an incline. Its simple yet effective design makes it a popular choice for applications requiring reliable and continuous material transport.
The company is the world’s best Large Screw Conveyor Spiral Chute supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.
Previous: Which laser is best for welding?
Next: Common Causes of Lithium Battery Explosion and Avoidance ...
If you are interested in sending in a Guest Blogger Submission,welcome to write for us!
All Comments ( 0 )