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Reduction gearboxes for ship

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The reduction gearbox reduces the revolutions per minute (rpm) of an engine. This allows the drive shaft connected to it to turn at a speed better suited to its functions. A reduction gearbox for ships is of substantial size to match that of the engine.

Applications

The reduction gearbox is used with engines turning at high revolutions per minute (rpm), such as gas turbines and certain diesels and electric motors.

Technologies

Reduction gearboxes link the engine to the propeller shaft. They consist of a series of gears and toothed wheels of different sizes, which enable the engine's rpm to be reduced to the range of appropriate working speeds of the shaft.

How to choose

Choice of gearbox will depend on the characteristics of the engine to which it will be linked. These include the engine's power and rpm, the torque and speed to be transmitted by the gearbox and the number of input and output shafts of the gearbox.

Advantages

- Adapts engine to propeller

Disadvantages

- Causes some energy loss

122 Products (boat or nautical equipment) | 17 Companies

Reduction gearbox for ships 1.5 -> 12.1:1 - 1000 -> 30000 kW A. Friedr. Flender

Single input/single output marine gearboxes are used in river boats and coastal vessels, but also in ocean-going vessels. Depending on the application they can be built with vertically, horizontally or diagonally offset shafts. ...

Reduction gearbox for ships 12000 kW max. A. Friedr. Flender

The NAVILUS range is completed ...

Reduction gearbox for ships (multiple input - single output) 2.0 -> 6.0:1 - 50000 kW max. A. Friedr. Flender

Multiple input/single output marine gearboxes direct the output of several diesel engines or electric motors to a propeller. Here, different ...

1 product

Reduction gearbox for ships GXU270 - GXU600 Finnoy

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 ...

Reduction gearbox for ships (dual input - single output) 2G23-30 - 2G60-80 Finnoy

Twin Input - Single Output

Twin input - single output gearboxes is often used when variable ...

Single stage reduction gearbox for ships G18 - G90 Finnoy

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 ...

Reduction gearbox with clutch for ships GA 80 Hundested Propulsion Systems

The Marine Gear GA 80 is a right angle gear without controllable pitch ...

Reduction gearbox for ships (for variable pitch propeller) CPG 32 Hundested Propulsion Systems

The workmanship of the gear boxes is of the same high quality as the rest of the programme of Hundested propeller fabric.
The CPG gearboxes introduce new principles for marine gears, as ...

Reduction gearbox for ships (for variable pitch propeller) GPGA 140 Hundested Propulsion Systems

The Marine Gear GPGA 140 is a right angle gear with ...

2 products

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120

Ship reduction gearboxes, Clutches...
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Propulsion systems for ships

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Catalog search

Mekanord
Mekanord profile

Here the first 5 pages from the catalogue "Mekanord profile", returning results for: reduction gearbox ships

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Gearbox Excellence . . .

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the propeller pitch to maintain the required vessel speed. In this way overall efficiency of the propulsion system is optimized. Gearbox Excellence . . .

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mekanord Gearbox Excellence . . . Market leading Solutions Company Mekanord is a leading market supplier of Controllable Pitch Propulsion (CPP) systems. We design and manufacture marine gearboxes and deliver either the gearbox only or the complete propulsion package including controllable pitch

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1spire.dk +45 30 51 16 42 Gearbox Excellence . . . sandholm 7 dk - 9900 frederikshavn denmark phone +45 9620 1400 fax +45 9620 1414 info@mekanord.dk www.mekanord.dk

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Gearbox Excellence . . . Our Philosophy Mekanord is a dynamic company with world class knowledge on gearboxes and we only deliver high quality products. Our company is flexible due to dedicated and committed employees who seek the challenges in making and mending gearboxes and controllable pitch
Hamilton Jet
Electronic controls

Here the first 4 pages from the catalogue "Electronic controls", returning results for: reduction gearbox ships

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of standard modules which may be connected together in varying combinations to build a vessel control system. A key feature of MECS is that each module is standard and the configuration of a complete system for a particular vessel, with the exception of engine and gearbox interface wiring, is achieved

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? Jet status & Alarm displays ? Gearbox control & Position indication ? Engine idle adjust (Normal mode only) ? Power alarm indication ? Warning buzzer & Cancel button ? Adjustable lamp dimming ? Backup select switch ? Backup jet controls (4-way jogstick) ? Backup engine controls (rpm

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Interface (electronic engine governor) ? Gearbox Servo Actuator (mechanical gearbox shift) or Electronic Gearbox Interface (solenoid gearbox shift) C.W.F. Hamilton & Co. Ltd. P.O. Box 709 Christchurch, New Zealand Ph ++64 3 962 0530, Fax +64 3 962 0534 email: marketing@hamjet.co.nz www

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DESCRIPTION The engine control provides an interface between the MECS system and a variety of gearbox types. ENGINE CONTROLMODULE (ECM) The Engine Control Module (ECM), which is normally mounted in the engine room, provides the interface between the MECS system and a variety of engine and gearbox
ZF Marine
COMMERCIAL CRAFT

Here the first 5 pages from the catalogue "COMMERCIAL CRAFT", returning results for: reduction gearbox ships

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the thrust loads to the ship?s foundation. The steel composition is according to ZF?s own ?Class 1A? specification which is well known and accepted throughout the industry. The gearbox models are available with or without engaging clutches (types NR and NC) and also with a wide range of Power Take

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matching of gearbox and propeller to the hull and engine characteristics. ZF Marine?s design experts work closely with ship designers, shipbuilders and engine manufacturers during the project phase, construction period and are available for analysis of sea-trial results. ?X Standardization

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7 8 9 10 11 12 OD box Transmissions details 7 Gearbox with or without disengaging clutch (type NR and NC). 8 Integrated hydraulic pump (standby pump loose or fitted on gearbox) 9 PTO assembly: Primary and secondary PTO?s with or without clutch. 10 Centralized and ergonomic alarm

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. The company grew rapidly and soon diversified to supply the automotive industry. The transmissions developed for the airships were ideally suited for installation in fast boats and in 1938 the first marinized version, the KS 25, was delivered to Daimler Benz. This very compact gearbox was close

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vessels, the company has steadily expanded its marine activities into the commercial vessel market. Over the past ten years, by means of internal design and development, as well as acquisitions, the power capacity of ZF Marine products has been increased to satisfy the requirements of specialized
WÃ¤rtsilÃ¤ Corporation
Wartsila-O-P-Steerable-Thruster

Here the first 5 pages from the catalogue "Wartsila-O-P-Steerable-Thruster", returning results for: reduction gearbox ships

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one outboard hoisting wire 10 • Maintenance possible while the vessel remains afloat BASIC THRUSTER • Bolt-in receptacle installed into a flanged (heavy tube type) bottom well • Steering gearbox on top of receptacle • Watertight caps and covers • Outboard part installed

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Lower gearbox with doublesided pinion bearings. Propeller shaft seal. Steering pipe seal. PROPELLER DESIGN The propeller design is always optimized and tailored to specific operational conditions. Our highly skilled and experienced engineers use state-of-the-art design programs to achieve: •

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 2200 kW containerized thrusters.  3000 kW retractable containerised thruster.  Drill ship Giomar Explorer is equipped with four LIPS FS1510-450/CN thrusters. LIPS MODULAR CONTAINERIZED THRUSTERS 800 kW retractable thrusters in assembly stage. Containerized thrusters

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Tug Thetis is equipped with two LIPS FS250-S/WN with HR nozzle and two Wärtsilä 9L20 engines. AH tug/supply vessel Seabulk Badamyard, equipped with two LIPS CS225-S/WN-K and two Wärtsilä 8L20 engines. 2000 kW compact thruster FS250-S/WN. 5

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Stemsection of a retractable thruster at the yard. Cable layer Knight is equipped with two LIPS FS3500-671/MN and two FS1510-350/1510 MNR. Internals modular Z-drive thruster. LIPS MODULAR / CAN-MOUNTED THRUSTERS Modular / can-mounted thrusters are applied in offshore and seagoing ships for: •
MJP Waterjet
MJP_Designers-Guide_opt.pdf

Here the first 5 pages from the catalogue "MJP_Designers-Guide_opt.pdf", returning results for: reduction gearbox ships

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Designer’s guiDe Designer’s guiDe Designer’s guiDe The Company, the guide and jet principles Selecting jet size and engine power Example performance diagram Gearbox Intake, material and design Intake grid Shaft arrangement Deﬁnition of jet position Hydraulic and lubrication

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- volume flow rate ρ - mass density of water t - waterjet thrust w - wake factor Jet velosity Vj (B) (D) L Shaft Color 4 - 0.15 mm Color 5 - 0.20 mm Color 6 - 0.30 mm Other - 0.01 m REDUCTION GEAR BOX OUTPUT SHAFT PIANO WIRE OR LASER BEAM IDEAL SHAFT CANTER LINE TARGET FOR SHAFT CENTER LINE (C) Ship

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is enclosed in the end of this guide. The performance diagram calculated for a water jet propulsion system establishes a relation between water jet thrust, impeller shaft rpm (or engine output shaft rpm when the gearbox is selected and the gear ratio is ﬁxed), engine power and vessel speed. The diagram

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Designer’s GuidE Gearbox Ratio The MJP Waterjets pump absorbs certain power at certain speed (rpm). The engine speed (rpm) is equal to the jet speed (rpm) times the gearbox ratio (i). The gearbox ratio (i) must be selected to match the jet power absorption to the engine power, see enclosed

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as standard the MJP Waterjet drive shaft to run all the way up to the gearbox flange without the need of additional support bearings, couplings or intermediate shafts. The limiting factors are the unsupported MJP drive shaft length and the distance from the stern to the gearbox flange. The unsupported MJP