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The invaluable reduction gearbox that makes it all possible

Efficient machinery with CP-propellers, a reduction gearbox with PTO/PTI, and control systems are the optimum system configuration for vessels with a versatile operational profile.

The reduction gearbox is often overlooked and referred to as a commodity in the propulsion line. In fact, this invaluable unit can be the heart in the propulsion configuration ensuring high flexibility from multiple power units.

A gearbox with Power Take-Out (PTO) and Power Take-In (PTI) units, further increases the functionality of the system. Efficient machinery with CP-propellers, reduction gearbox with PTO/PTI and control systems are the optimum system configuration for vessels with a versatile operational profile.

An efficient propulsion system including reduction gearbox with PTO/PTI open the doors for all present and future energy sources, whether it is a combustion engine or an electric motor or both connected to the gearbox in the configuration.
Reduction Gearboxes at Brunvoll - customised to the specific vessel's propulsion configuration and operational profile.

Hybrid Propulsion

Our Hybrid PTI/PTO system allows for the highest energy efficiency provided the right energy sources are selected to serve the range of operational conditions varying from lying idle, or sailing in silent zero emission mode, to the need for full power in heavy operations at sea. In PTO-mode the shaft generator is serving energy from the main engines to hotel load or other consumers via the gearbox.

A twin screw propulsion system: two propellers with ICP (Integrated Costa Propulsion) connected to twin-in single-out gearboxes with in total four combustion engines, two electric motors and two generators, along with batteries and gensets.
This configuration allows for high flexibility with multiple operation modes and redundancy.

Energy efficient propulsion system improves the CII score

One of the hot topics in shipping these days is how to improve vessel efficiency to meet the tough requirements of IMO’s Carbon Intensity Indicator (CII) ratings. Many measures are relevant, and on the technical and operational side an energy efficient propulsion system will reduce the annual energy consumption and thereby improve the CII score.

For vessels in the short sea segment, an electric & hybrid propulsion system can offer the most efficient and reliable propulsion. A propulsion system with a gearbox is optimised to the operation profile of the vessel with the alternative power sources. Adding a reduction gearbox to the propulsion configuration allow for use of standard electric motors which gives a cost-effective solution with less weight to the system setup.

Brunvoll CRP System - Contra Rotating Propeller system with gearbox is ideal for vessels with a certain share of transit mode in its operation profile

Gearbox and CP-propellers in wind-powered ship propulsion

In wind-powered propulsion configurations the power can vary significantly based on the weather conditions. Such systems often involve hybrid setups, where multiple power sources are utilized, and a reduction gearbox and controllable pitch propeller maintain optimal performance.

A propulsion system for flexibility, efficiency, and improved performance in an environmentally friendly marine transportation.

For vessels that have pure sailing condition in part of the operational profile, the CP propeller can be designed for generating energy in water milling or harvesting mode. The generated energy is then transferred to energy storage devices via the gearbox' PTO system.

The 2-speed gearbox and CP-propeller in a hybrid setup with a combustion engine and PTO/PTI for generator/electric motor is a fuel-efficient and flexible system.

The Gearbox makes a difference

Brunvoll’s range of propulsion systems with gearboxes varies from single mode transmission systems to advanced systems customised for vessels with a high number of operation modes.

The 2-speed gearbox has proven to be a fuel-efficient system, simply by optimising the power and propeller rpm to the main operation conditions.

Combined with the deep technical knowledge of the engineering team and our long experience in optimising each project for cost efficient configurations, Brunvoll reduction gearboxes and CP-propellers make a difference.

Brunvoll gearbox design, engineering, machining and assembly take place in Brunvoll factory in Norway

Contact persons

For more information, please do not hesitate to contact us.

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Arnfinn Brautaset

Arnfinn Brautaset

Sales Manager, Brunvoll Volda AS

+47 915 77 678
Per Endre Woldsund

Per Endre Woldsund

Sales Manager, Brunvoll Volda AS

+47 905 72 814
Vidar Liaskar

Vidar Liaskar

VP Sales, Brunvoll Volda AS

+47 952 57 129
Stig Helland

Stig Helland

Sales Manager, Brunvoll Volda AS

+47 911 11 595
Kirsti Gjørvad

Kirsti Gjørvad

Senior Sales Manager, Brunvoll Volda AS

+47 916 29 430
Karim Alexander Longva

Karim Alexander Longva

Sales Manager Retrofit, Brunvoll Volda AS

+47 979 86 830
Mads Egseth Melbø

Mads Egseth Melbø

Sales Manager Service, Brunvoll Volda AS

+47 971 95 808

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