Wärtsilä single input, single stage, reduction gears provide a consistent propeller speed and cover a power range from 600 to 24.000 kW. The vertical or horizontal offset between the input shaft and output shaft accommodates a wide range of engine-propeller shaft arrangements.
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SV Type
File |
Size |
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Wärtsilä Single Input Gears SV85
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2.58 MB
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Wärtsilä Single Input Gears SV75
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4.34 MB
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Wärtsilä Single Input Gears SV105
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2.47 MB
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SCV Type
File |
Size |
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Wärtsilä Single Input Gears SCV50
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4.78 MB
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Wärtsilä Single Input Gears SCV56
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4.16 MB
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Wärtsilä Single Input Gears SCV62
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5.07 MB
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Wärtsilä Single Input Gears SCV62
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5.12 MB
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Wärtsilä Single Input Gears SCV75
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4.47 MB
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Wärtsilä Single Input Gears SCV75
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4.74 MB
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Wärtsilä Single Input Gears SCV95
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4.26 MB
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Wärtsilä Single Input Gears SCV110
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2.76 MB
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Wärtsilä Single Input Gears SCV105
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1.98 MB
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Wärtsilä Single Input Gears SCV116
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4.19 MB
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Wärtsilä Single Input Gears SCV128
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2.54 MB
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SCH Type
File |
Size |
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Wärtsilä Single Input Gears SCH75
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5.02 MB
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Wärtsilä Single Input Gears SCH85
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4.73 MB
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Wärtsilä Single Input Gears SCH95
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4.42 MB
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Wärtsilä Single Input Gears SCH116
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4.46 MB
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Wärtsilä Single Input Gears SCH105
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4.3 MB
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All Wärtsilä gears can be supplied with one or more PTOs for driving the shaft alternator, compressor or pump. For single vertical and horizontal gears, the standard PTO is primary driven. For double gears, the PTO is optionally primary or secondary driven.
A primary driven PTO rotates whenever the engine is rotating.
A secondary driven PTO rotates whenever the propeller shaft is rotating.
Most Wärtsilä gears can be supplied with a combined PTO/PTI. In PTI mode the shaft alternator can also be used as an electric motor. PTI is normally used for the following operational modes:
PTI “Booster” mode is used when the main power of the engine is insufficient in order to increase the total propulsion power. For this mode, no clutches are required on the gear.
PTI “Take me home” mode is used in case of emergency should the prime mover be inoperable. For this mode a minimum of 2 clutches are required on the gear.
Most Wärtsilä gears are purpose-designed with an integrated hydraulic system for both the gear and the CP propeller. As a separate hydraulic power unit for the CP propeller is superfluous, both installation costs for the yard and operational costs for the owner are reduced. For safety reasons the gear mechanically drives the main pump for the propeller. All gears can also be interfaced with a separate hydraulic power unit.
Based on the standard Wärtsilä gear types, customized solutions can be delivered upon request.
Examples:
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Sten Idun is a 16400 dwt Chemical Tanker with a Wärtsilä equipment package of engines, gear and propulsors. Sten Idun vas commissioned 2003 and features a PTI booster and takes me home mode.
The Voyager is deployed in the Irish Sea. Pelagic trawlers are huge vessels built for deep sea fishing, with facilities for keeping the catch fresh over prolonged periods at sea. The hull is designed to ensure safety, and to give good fuel efficiency and high speed.
The Tong Xu is a large trailer suction hopper dredger delivered in 2008. The vessel is equipped with a complete Wärtsilä package with two 12V38 engines, two gearboxes, two controllable pitch propellers, two transverse thrusters and propulsion controls.
The Quantus is a modern trawler designed and built for efficient fishing. The vessel incorporates a number of innovative ideas, including a new hull form designed to combine optimum steaming and towing characteristics with fuel efficiency.
