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Reduction gear

Proven single-input/output design

Offering a variety of power take-offs enabling large shaft generators to be driven, and electric motors to feed in power for get-you-home propulsion, or as part of a hybrid system

Reduction gear

Rolls Royce marine reduction gearbox has a proven history in providing reliable and efficient drive technology to offshore, merchant, passengers and various other market segments of marine industries. Our new standard design offerings for single in –single out reduction gearbox (Vertical and Horizontal version) is applicable for maximum continuous engine power rating from 2000KW to 18000KW delivering maximum output torque ranging from 90 to 1350 KNm.

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Mode no. Descr.     Gear configuration Gear configuration  
Mode no. Descr. No PTI/PTO Primary PTI/PTO Secondary PTI/PTO Secondary PTI/PTO w/clutch `Double clutch´
Mode no. Descr. - P or KP S or KS SC or KSC AGHC-PC/SC* or KP
1 Propulsion only OK Will spin generator Will spin generator OK Will spin generator
2 Propulsion + PTO Not possible OK Check power system design and DP requirements Check power system design and DP requirements OK
3 Propulsion + PTI Not possible OK OK OK OK
4 PTI only Not possible Not possible OK OK OK
5 PTO only Not possible OK Not possible Not possible OK
  • GHC type: max. torque output - 90 to 950 kNm
  • Available with a range of both vertical and horizontal shaft offsets
  • Four configurations can be specified:
    • Standard GHC
    • P – with primary (power take in/off) PTI/PTO
    • S – with secondary PTO
    • SC – with secondary PTO and clutch

Three different standard options for PTO/PTI shaft. i.e Primary PTO/PTI shaft (Ex:-850GHC-P600), Secondary PTO/PTI shaft (Ex:-850GHC-S600), Secondary PTO/PTI shaft with clutch (Ex:-850GHC-SC600). In addition, non-standard options such as - Primary and Secondary PTO shaft with twin clutch may also be available on request (Ex:-850GHC-PC/SC600). All these variants are applicable for gearbox sizes ranging from 550 to 1280.

There are three different options available based on hydraulic systems:

GHC design: - Integrated hydraulic single tube system for gearbox lubrication & cooling, clutch actuation and propeller pitch control incorporated in the gearbox. This is applicable for vertical version ranging from 550 to 1080.

GDC design: - Integrated hydraulic twin tube system for gearbox lubrication & cooling, clutch actuation, propeller pitch control and propeller hub lubrication incorporated in the gearbox. This is applicable for vertical and horizontal version ranging from 650 to 1080.

GFC design: - Hydraulic system for gearbox lubrication & cooling, clutch actuation with separate FO box for propeller pitch control and propeller hub lubrication. This is applicable for vertical and horizontal version ranging from 550 to 1280.

The entire range of standard Rolls Royce gearbox coupled with diesel/LNG engines are deliver with mechanical pumps for safety reasons and electric stand by pump separately installed. There is also a possibility to deliver the gearbox with additional electric stand by pump. This is applicable for vertical and horizontal version ranging from 550 to 1280. Gearbox running with electrical drives is deliver with electric standby pump aggregate.

Services & Aftermarket Support

Hybrid Shaft Generator (HSG)

Allowing for more flexible use of engine and propeller speed variations.

Hybrid Shaft Generator (HSG)

The Hybrid Shaft Generator (HSG) upgrade is a modification to the power electronics system which controls the shaft generator to switchboard power flow.

This means that the diesel engine and the propeller can operate at variable speeds, whilst keeping the network frequency-stable and voltage fixed. With the HSG system the switchboards see a constant voltage and frequency at variable engine rpm. The HSG system upgrade allows for more flexible use of engine and propeller speed variations, so that both propeller and engine efficiencies can be maximised by ensuring that they are running at their most efficient point.

Customer benefits
  • Reduced fuel consumption – Optimised system operation means that engine rpm can be reduced while maintaining the voltage and frequency to the switchboard. This results in considerable potential for fuel savings and NOx/CO2 reduction.
  • Flexible operations – with the Hybrid Shaft Generator upgrade, the shaft generator also acts as an electric motor. As a motor, it can operate alone, or together with the main engine for more power options.
  • Optimised propulsion mode selection – This system has a fast easy mode change capability between generating and motoring for five options: boost mode, diesel electric mode, parallel mode, transit mode and shore connection mode.
  • Longer engine life and reduced maintenance – reduced running hours on auxiliary gen sets, thrusters and electric motors extend their lives and maintenance intervals, lowering operating costs.
  • Increased comfort on board – Lower noise and vibration levels with reduced engine rpm and running hours.
  • System compatibility – Further additional fuel savings can be made when combined with a thruster starter upgrade.
  • Improved redundancy – the propulsion system still operates, even if one engine should fail.
HSG operation modes
  • SAVe Cube
    SAVe Cube has all frequency converters, drives and switchboards integrated into a single cabinet to save space and simplify installation. Additional battery power is available for low-speed.
  • SAVe Combi
    As its name suggests this system is made up of a variety of building blocks and can be designed to almost any desired systems architecture for operation in a wide variety of modes. One cabinet performs the task of several power functions and drives.
  • SAVe Line
    SAVe Line is a traditional diesel-electric propulsion system now operating in more than 130 vessels. It uses Active Front End (AFE) technology for more stable clean voltage and fast response to load control changes.
  • SAVe Safe
    The SAVe Safe system has diesel electric propulsion with distributed batteries that provide load smoothing to reduce generator requirements and offer continuous power to thrusters to improve system redundancy.
Contacts and support

If you are interested in learning more about our HSG upgrade options, or if you would like to discuss your requirements in more detail please contact us and we’ll be happy to help.

Arnt Ove Austnes
General Manager, Sales
[email protected]

See also

Customer Product Training

Offering blended teaching combining e-learning, simulator training and more.

Customer Product Training

Ensuring that your crew are properly and thoroughly trained will reduce operational risk and downtime plus maximise return on asset investment.

It also enables you to meet regulatory standards, improve crew safety and retain key personnel. In our state of the art training centres qualified and experienced trainers are able to provide your crew with practical training tailored to suit your products, systems and operational requirements. Our instructors can also train your crew on-board their vessel.

From hands on experience on full sized products in our training workshops, to experiencing real life scenarios in our virtual reality simulators all of our courses are designed to focus on safe and efficient operation and maintenance of your Rolls-Royce equipment.

Regional training centres:

  • Ålesund, Norway
  • Niteroi, Brazil
  • Singapore
E-learning

This type of solution is ideal for course preparation, where the participant is exposed to theoretical training for fundamental basic knowledge, with e-assessments throughout the module to assist in measuring the participants understanding of the basics.

Classroom

This type of solution is ideal for theoretical training, especially for larger groups. It goes through detailed systems overview including drawings and functionality.

Workshop/technical room

This type of solution is ideal for practical training with focus on maintenance and troubleshooting on actual products. This type of training used together with classroom training can provide a holistic view of complete systems.

Simulators

This type of solution is ideal for operator training where simulations of real life scenarios occurring at sea expose crew to dangerous situations in a controlled environment. They can be configured for systems or stand-alone operations like subsea, bridge, crane or winch operations.

  • DP simulator

    Practice manoeuvring around an oil platform in all types of sea conditions. Learn from realistic situations using operator stations arranged as on the vessel.

  • Winch simulator

    Enhanced with a winch remote control and monitoring system, the latest winch configurations helps crew practice and learn how to handle complex winch operations.

  • Seismic simulator

    Realistic training on deploying the streamer cable and deflector. Simulating the operator’s tasks on the back deck of a seismic vessel, using the control system together with the radio remote.

Book a course

Find out more or book a course

24/7 Technical Support

Our 24/7 technical support team is there to help at any time of day or night.

24/7 Technical Support

Our 24/7 technical support team is there to help at any time of day or night wherever your vessel is located. They manage your call from the time it is received to the time the issue is resolved.

The team has direct access to the experts in our product centres, should additional support be required, and for the more complex issues a product specialist will be assigned to you. Our priority is to get the right expertise quickly matched with the issue to provide the answers you need.

Contacting any of these numbers will put you through to our global support team:

Americas: +1 312 725 5727
Asia Pacific: +65 6818 5665
Europe, Middle East & Africa: +31 20 700 6474
Email: [email protected]

Spares

We understand the importance of having the right parts, available in the right place, at the right time.

Spares

We understand the importance of having the right parts, available in the right place, at the right time. Working in close collaboration with our customers we have now developed a Spares Transformation Programme (STP) to further improve our customer response times.

This programme will streamline our operations to reduce lead-times, increase spares availability, and allow customers to track the status of their spares delivery in real-time.

To support the programme, we have opened a dedicated Marine Parts Service Centre (MPSC) to process spares quotations and orders centrally. This is underpinned by an improved logistics and IT infrastructure, which will enable us to deliver high-quality support to our customers, wherever they are in the world.

24/7 Technical support

Our 24/7 technical support team is there to help at any time of day or night wherever your vessel is located. They manage your call from the time it is received to the time the issue is resolved.

Contacting any of these numbers will put you through to our global support team:

Americas: +1 312 725 5727
Asia Pacific: +65 6818 5665
Europe, Middle East & Africa: +31 20 700 6474
Email: [email protected]
Locate your nearest office

Our local representatives will continue to respond to your support requirements 24/7. If you would like to learn more about how this enhanced service delivery will benefit you, please contact your nearest Rolls-Royce Office

How can we help you?

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Marine products and systems catalogue
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Marine global service network catalogue
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