Marine products offered by Finnøy Gear & Propeller AS


	Finnøy Gear & Propeller AS

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GEARBOXES

Single Stage Gearbox 
The reduction gearboxes are designed for engines between 150 kW to 8000 kW. Maximum input speed is from 3200 rpm to 1000 rpm for the largest gearboxes. The reduction ratio is from 2:1 up to 10:1. The largest reduction is done by an additional gear train. The gearboxes can be delivered with PTO’s for hydraulic pumps or shaft generator.

GXU Gearbox
GXU gearboxes are designed for vessels where the size of the engine room is limited. The gearbox can be delivered with different center distances for best possible arrangement in the engine room. The gearbox is engineered with a solid design for high reliability in operation. PTO’s for hydraulic pumps or shaft generator can be delivered.

Twin Input - Single Output
Twin input – single output gearboxes is often used when variable power to the propeller is required. The gearbox can be operated with one or two engines at the same time. In vessel were extra reliability is required this is a good solution. The engines can either be placed in front or behind the gearbox. PTO’s for hydraulic pumps or shaft generator can be delivered.

The gearboxes are manufactured with following main components:
• Cast steel gearbox housing
• Input shaft arranged for flexible coupling
• Hydraulic operated multi-plate clutch for secure and soft engagement
• Gearwheels with hardened and ground helical teeth for silent operating
• Hydraulic built in servo unit for secure propeller pitch setting
• Output shaft with flange arrangement for propeller shaft coupling
• All bearings of roller type with a low friction losses and long lifetime
• Spherical roller thrust bearing with a low friction losses and long lifetime

All parts are made of the most suitable material qualities.

Finnøy Propulsion Systems

Pamphlet

pdf

PROPELLERS

CP Propeller

The CP Propellers are manufactured from 1000 mm to 5000 mm in diameter. They are delivered with 3, 4 or 5 blades. The propeller hub and blades are manufactured in Ni.Al.-bronze. They can also be delivered in Stainless steel. The hydrodynamic blade design calculations are based on detailed analysis in computers together with Finnøy’s long experience.

The propeller shaft is hollow bored and made of carbon steel or stainless steel. The pitch is adjusted by the push – pull rod. It transfers the axial force from the servo piston in the gearbox to the pitch setting mechanism in the propeller hub. The propeller hubs, type P26 to P48, are grease lubricated and from P39 to P125 are oil lubricated.

The stern tube is delivered complete with bearings, sealing boxes and a gravity tank for stern tube oil. The stern tube can be delivered suitable for either oil or water lubrication. The sealing boxes are Finnøy’s own design, but other types can also be supplied. The propeller shaft flange is a split type for the smaller shafts and an oil shrink type for the larger shafts.

Benefits of controllable pitch propellers compared to fixed pitch propellers:
• Secure and precise manoeuvrability
• An increase in the average speed
• Stern tube wear is reduced
• A constant speed at engine is possible
• Easy replacement of spare blades
• Engine wear is minimized
• Reduced fuel costs
• Dynamic position of vessel possible
• Stepless speed control of the ship
• Load control of engine is possible
• Full power available under all conditions
• The propeller can be designed for free running and towing 

Propeller Design
All ships have individual needs. Speed is important for some ships. Towing pull is more important for others. To satisfy these needs Finnøy use the most suitable software together with Finnøy’s knowledge when designing propeller blades. The propeller blade is designed for best possible performance regarding thrust, efficiency, noise and vibration. The blades are ground and balanced according to ISO 484 standards.

Nozzle
With ships that need maximum towing thrust a nozzle could be fitted. The nozzle increases the bollard pulls by approx 30%-40% over an open propeller absorbing the same power. It can be delivered as a steering or fixed nozzle.

Finnøy Propulsion Systems

Pamphlet

pdf

REMOTE CONTROL

Remote Control
Electronic remote control for control of gearboxes and cp-propeller systems. Remote control systems of all types can be supplied, as a single panel for control of pitch and rpm to larger combinator controls and single lever joy-stick systems.

Standard:
• Pitch indication on all panels
• Control of clutch In/Out from all remote stations
• Alarms for control voltage failure and pitch feedback failure
• Emergency control from main panel on bridge
• Control position changeover between main and slave controls,
   with synchronisation of the control levers
• Dimming of all lights and indicators on the bridge panels

Optional:
• Automatic overload control where rpm and fuel consumption
   are the main parameters
• Propeller rpm indication

Finnøy Propulsion Systems

Pamphlet

pdf