New MacGregor self-unloading system to enhance bulk handling efficiency

(Posted on 11/02/24)

MacGregor, part of Cargotec, has launched a new and augmented gravity self-unloading system that will allow bulk carriers to deliver a wider variety of cargo, in greater volume. The new system, the ‘MacGregor GravityVibeTM’, deploys a patent-pending vibrating unloader to reduce internal friction and ease the discharge of coarse materials such as wood chips from the cargo hold.

While the automated unloading sequence remains a gravity-based operation, the MacGregor GravityVibeTM includes vibrating panels to shift the remnants or break the ‘bridges’ that form when coarse material sticks together to block the outlet. Crucially, the vibrating panels are isolated from the hull structure – using a solution from MacGregor on which a patent is pending – to minimise the transfer of vibrations and noise to other parts of the vessel.

In contrast with a standard gravity self-unloading configuration, where slope angles range from 35 to 60 degrees depending on the material, the MacGregor GravityVibeTM can discharge various cargo types with slope angles of just 15–20 degrees. Since steep slope angles limit hold volume, the system therefore increases not only the variety of cargo types a vessel can handle but also its cargo capacity. The additional capacity also translates into lower carbon dioxide emissions per carried tonne of cargo.

“Bulk carrier cargo holds are typically designed to handle a specific kind of material, meaning the ship owner is somewhat limited in the type of assignments they can take on,” said Mikael Hägglund, Sales Manager, Self-unloading systems and Cranes, MacGregor. “The MacGregor GravityVibeTM overcomes these limitations to afford owners greater flexibility when taking on new contracts, and it also boosts earning potential and environmental performance by optimising cargo capacity.”

Whereas large sized conventional self-unloaders feature two longitudinal and two transfer conveyors, the MacGregor GravityVibe’s low slope angles also mean that it functions with just one longitudinal conveyor. With fewer components installed, the required maintenance and spare-parts will be low when compared with conventional self unloading systems. The streamlined set-up also minimises spillage and the need for cleaning, meaning less work and improved safety for crew. With its increased efficiency and reduced complexity, the MacGregor GravityVibeTM solution provides a highly cost effective alternative to traditional solutions.

“As the culmination of decades of experience in self-unloading systems and years of targeted research, the MacGregor GravityVibeTM is our most advanced self-unloader yet,” said Tomas Wallin, Senior Product Owner, Self-Unloaders, MacGregor. “We developed the system according to established best practice, using textbook understanding of material behaviours in combination with a decisive innovation on how to handle cargo types with different properties. We have also tested it in collaboration with leading research centres and technology area experts.”

MacGregor will be offering customers the opportunity to validate the GravityVibe’s handling of their chosen materials in full-scale mock-up demonstrations at the company’s test facilities.

Latest News

Bruks Siwertell Group announces leadership transition

Bruks Siwertell Group has announced a leadership transition as Peter Jonsson steps down as CEO after... Read more

ClassNK issues AiP for OceanWings Rigid Windsail Type WAPS

ClassNK has issued an approval in principle (AiP) for a Rigid Windsail Type Wind-Assisted Propulsion... Read more

Seafarers welcome Elcome’s new pay-as-you-go high speed internet service

Elcome International’s new high-speed internet service, WELCOME, is revolutionising the way ship... Read more

Kaiko funding to enhance resilience in maritime operations with AI

Kaiko Systems, a leader in AI-driven frontline intelligence for the maritime industry, today announced... Read more

Liebherr manufactures 2,000th LHM

Marcegaglia’s latest acquisition, the LHM 600, marks a significant milestone as the 2,000th mobile... Read more

IOMSR plays key role in pioneering maritime wind power project

The Isle of Man Ship Registry (IOMSR) is playing a key role in the development of a high-tech sail aimed... Read more

AtoB@C Shipping at halfway in newbuilding programme

AtoB@C Shipping, subsidiary of ESL Shipping, has taken delivery of Terramar in Goa, India on 14 March... Read more

Strong VIKING on track towards new goals

As a new strategy period commences, VIKING Life-Saving Equipment A/S has achieved strong financial results... Read more

Baltic Exchange introduces biofuel blends in expansion of Emissions Calculator

Baltic Exchange has introduced a series of green fuel options to its FuelEU voyage and compliance cost... Read more

Veson Nautical and Cargill expand long-standing partnership

Veson Nautical, a global leader in maritime data and freight management solutions, and Cargill have... Read more