Motion Control & Drives


Collaboration creates a bespoke solution for leading animal feed producer

May 2021 Motion Control & Drives

High-capacity mixers for feed milling depend on drive technology that is sufficiently robust to provide reliable operation in demanding applications and challenging environments. SEW-EURODRIVE upgrades and supplies reliable gear units and drives for this industry.

When specialist feed-milling original equipment manufacturer, Dalein Agriplan, was tasked with designing a one-of-a-kind high-speed, high-capacity mixer for a leading South African animal feed producer, it knew where to turn for an experienced partner to help it deliver a unique precision-engineered solution.

SEW-EURODRIVE South Africa was the obvious answer to its requirement for a custom-designed 6 ton twin-shaft paddle mixer and drive system to replace the single-shaft system used in the original installation.

Because the client’s requirement was for a 6 t capacity mixer and Dalein Agriplan had not previously delivered an installation larger than 5 t, the companies collaborated to develop a bespoke solution – the MPT6000H heavy duty twin-shaft paddle mixer.

Given that this was a prototype and they couldn’t rely on any previous data, the two companies worked hand-in-hand on the necessary calculations and specifications. The SEW-EURODRIVE team has many years of experience in applying a versatile and adaptable modular service concept to projects, enabling clients to achieve optimal implementation and commissioning of new systems.

High torque at minimum speed

The aim was to design a mixer capable of producing the required level of torque, while running at optimum rotor speed for the effective product blending that was required by the client. Part of the challenge was to enable a 3 ton batch of feed product to be mixed in 90 seconds, whereas this previously took around three minutes with the original single-shaft mixer.

To meet these requirements for increased speed and mixing efficiency while processing a larger quantity of animal feed, SEW-EURODRIVE supplied two industrial gearboxes with XT configurations.

The XT gearbox forms part of the robust industrial X-series manufactured in Germany. It is a coaxial bevel-helical industrial gearbox, creating a unique gearing system with shaft positions that allow it to utilise a twin-shaft mixer instead of a single-shaft design.

For this project, the specific size of the gearboxes was calculated to deliver the required torque at the optimum speed. The two gearboxes are driven from a single motor using a dual-input coupling.

Following installation of the mixer at Dalein Agriplan’s client – animal feed supplier De Heus South Africa’s factory at Umlaas in KwaZulu-Natal – SEW-EURODRIVE inspected the on-site setup of the gearboxes on the mixer, while Dalein ensured successful start-up and commissioning.

“Although the bespoke design and engineering requirements presented certain challenges, arguably the greater test was navigating the supply chain process between Germany and South Africa during the strict levels of lockdown,” says Phillip Steyn, sales representative at SEW-EURODRIVE South Africa. “But, with agriculture being an essential service and our company being an accredited supplier of essential services, international shipments and local deliveries were completed on schedule.”

Although the XT gearbox is sourced from Germany, spare parts are stocked locally and available at short notice to South African clients, along with the necessary technical support.

The successful collaboration on the De Heus project continues a long history of co-operation between Dalein Agriplan and SEW-EURODRIVE. The former has been incorporating SEW products into its plants and projects for many years.

“Because of our long-standing reputation, plus our local footprint, technical assistance and stock availability, many agri-plant suppliers specify only SEW-EURODRIVE geared solutions for their projects,” concludes Steyn.

For more information contact SEW-EURODRIVE, +27 11 248 7000, jklut@sew.co.za, www.sew-eurodrive.co.za


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