Dellner Brakes

Precision-Engineered Marine Stopping, Turning and Locking Systems

Dellner

Dellner Brakes manufactures technologically advanced stopping, turning and locking (STL) systems for the marine industry.

The company's cost-effective systems and components come in a range of standard sizes and can also be custom-built to meet specific needs.

Precision-made in Sweden, Dellner's brakes can be found in marine vessels, such as modern aircraft carriers, cargo ships, ferries, workboats, luxury yachts, and cruise liners, including Cunard's flagship the RMS Queen Mary 2.

Stopping, turning, locking (STL) system solutions

Dellner's innovative STL braking systems are precision-engineered to facilitate faster directional changes with maximum manoeuvrability.

The unique design also reduces fuel consumption, load on the propulsion systems, and sea growth on the propeller, and enables easy and safe maintenance, as well as hydrodynamic bearing conditioning on cruise liners.

STL braking systems follow the process below:

  • Stop: a hydraulic or electric disc brake system stops the shaft quickly in any position
  • Turn: after the brake has stopped the disc, a separate mechanism turns the disc and connected shaft into position for locking
  • Lock: once in position, the locking mechanism pushes a specially designed tapered pawl into a machined slot on the brake disc

This process locks and holds the shaft securely in place, even in ship failure modes. The systems are modular, so customers can choose one, two or all three STL functions to meet their requirements.

The electrically powered continuous turning (cT) function, available with the electrical STL or as an option on the hydraulic STL, allows the shaft and propeller to be turned forwards and backwards for long periods at variable speeds, easing maintenance, checking and testing processes.

Fully automated electrical STL (eSTL) braking systems

Dellner's fully automated electrical STL (eSTL) braking system is the first of its kind in the world and has a patent pending.

Developed in response to an increasing global focus on environmental issues and a demand for smaller, flexible braking solutions, this electrical system offers high levels of power in a compact configuration.

eSTL needs no additional piping, making it quick, easy and cost-effective to install, especially where space is limited. It's simple to use and maintain, hard-wearing, and suitable for applications where a clean environment is critical or for use in green shipping zones.

The fully automated system can also be operated from an optional remote hand-held control, giving operators the freedom to inspect the system during maintenance and testing.

eSTL offers stopping torque up to 900kNm, turning torque up to 600kNm and locking torque up to 1,650 kNm.

Precision-manufactured disc brakes for marine vessels

Dellner's SKD disc brake systems are precision-engineered for powerful, reliable and safe braking of rotary motion, as well as increased brake lifespans. They are designed for use on propulsion propeller shafts or wherever service, stopping, holding or tensioning is needed.

These direct-acting, hydraulic or air pressure-applied, spring-released units have a braking force up to 516 kN, which is directly proportional to the pressure applied.

Each symmetrical brake half has two guide pins that transmit the tangential braking force from the brake lining to the housing and mounting support. This removes any radial force on the brake pistons, contributing to a longer brake lifespan. Brake pad wear is automatically compensated for with the systems' increased piston stroke.

SKD disc brakes are available in a range of standard sizes and can be customised to order, with a range of optional mechanical switches to indicate on / off and brake wear.

Dellner also produces a range of SKP spring applied / pressure released disc brakes for emergency braking on cranes, winches and other deck and dockyard machinery.

In addition, the company supplies a range of customisable power packs, steel pillow blocks, brake discs and hubs.

Locking mechanisms (LM) for ship propeller shafts

With a locking force of up to 1,000 kN, which is higher than a holding brake, Dellner's locking mechanisms provide a compact, cost-effective solution for holding propeller shafts in place while also reducing brake wear.

The LM can be operated manually, hydraulically or electrically.

About Dellner Brakes

Dellner Brakes is a world leader in marine braking solutions. The company's flexible, customer-oriented approach allows them to continually adapt their products to meet customers' specific needs and changing market requirements.

Dellner Brakes is ISO 9001: 2008 certified and its commitment to cutting-edge design, robust assembly and precision testing ensures reliable, high-quality products.

Based in Sweden, the company is part of the 700-employee global Dellner Group, enabling them to utilise production, sales and service offices worldwide.

Contact Details

Dellner Brakes AB
Vikavägen 144
SE-791 95 Falun
Sweden
Contact: Roger Axelsson, Global Sales Manager
+46 (0)23-78 3054
roger.axelsson@dellner-brakes.com
www.dellner-brakes.com

Available White Papers

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Hydraulic ‘Stopping, Turning, Locking’ Systems for UK Navy T45 Destroyers 28 April 2017 BAE Systems has on the UK Royal Navy's behalf planned to build six destroyers of type T45.