Essential Design Elements for Auger Screw Conveyors

Auger screw conveyors utilize a rotating screw blade to move granular or liquid materials. They create an efficient and consistent material flow, making them popular in a variety of bulk handling industries. Auger screw conveyors are highly versatile, also functioning well as agitators, blenders, and balers in addition to their use as standard media conveyors.

5 Different Types of Auger Screw Conveyors

Due to its popularity and versatile range of use cases, there are a wide range of variations on the basic auger screw conveyor design.

Horizontal Screw Conveyor

This type of screw conveyor is one of the most widely utilized options thanks to its simplistic design. It works well for both non-flowing and free-flowing media, conveying materials at 15-45% trough loading. Horizontal screw conveyors are incredibly cost-effective and ideal for applications that necessitate homogenizing mixtures.

Inclined Screw Conveyor

Inclined screw conveyors are available in inclines ranging from 0-45 degrees. The performance of this type of conveyor will vary significantly depending on the degree of incline, with higher inclines requiring higher amounts of torque. Ideally, the angle of inclination will remain lower than 10 degrees, as this will have a minimal effect on the conveyor’s efficiency. Incline screw conveyors are a popular option for applications such as feedlot dispensers and cement mixers.

Shaftless Screw Conveyor

While most screw conveyors feature a screw blade that rotates around a shaft, shaftless screw conveyors remove the shaft to allow more material to flow through the conveyor. These types of conveyors can move materials that would typically clog a screw conveyor. Featuring very high efficiency, shaftless screw conveyors have become popular in the following industries:

• Mining
• Chemical processing
• Food processing
• Wastewater

Vertical Screw Conveyor

Any screw conveyor with an incline greater than 45 degrees is classified as a vertical screw conveyor. This design features the advantage of taking up very little space and is best for transporting semi-fluid or dry materials. Vertical screw conveyors are common in applications such food production, chemical processing, and wastewater treatment.

Live Bottom Screw Conveyor

For applications that require a great deal of control over the flow rate of bulk materials, the live bottom screw conveyor is the optimal choice. This conveyor’s design features multiple rows of parallel screws, enabling even material discharge. This type of conveyor functions well with any type of material that would pack under pressure.

Design Elements of Auger Screw Conveyors

When designing a screw conveyor, there are several important elements to consider:

• Capacity. To determine the appropriate screw diameter, calculate the volume per hour that the screw conveyor will need to transport.
• Design and drive. Given the range of different screw designs, the design must consider the ultimate goal of the conveyor. For example, an application requiring the material to be mixed will differ from an application requiring an incline.
• Load type, trough load, and trough design. To design the trough, determine the type of material conveyed within the intended application. Lightweight or hazardous materials will require a different type of trough than thicker, non-flowing materials.
• Environment. Environmental factors, such as how much distance a screw conveyor must cover, will impact the final design of the conveyor.

Custom Screw Conveyor Design

At Reinke & Schomann, we provide engineering services and manufacturability consulting to assist our clients in developing the ideal custom screw conveyor for their needs. We offer a variety of features for our screw conveyors, including:

• Wear-resistant troughs
• Trough liners
• Wear shoes
• Standard and special drives
• Ready-to-plug-in systems

Since 1929, Reinke & Schomann has built a reputation as a dependable one-stop-shop for high-quality screw conveyors. We work with state-of-the-art fabrication equipment at our dedicated 20,000-square-foot facility to provide custom solutions that meet and exceed the expectations of our customers. To work with us on your next auger screw conveyor project, please contact us or request your quote today.