Thrusters: future-proofing your vessel and investment

Thrusters: future-proofing your vessel and investmentPremier partner Sponsored by

1 June 2021 • 09:00-09:45 BST

#marinepropulsion

Marine Propulsion Webinar Week

Part of

1-4 June 2021

Presentation & sponsor documents:Page 2: Jonas Nyberg, Berg Propulsion2: Duncan Payne, Global Ship SupportPage 22: Lauri Tiainen, WärtsiläPage 31: Wärtsilä company information

THRUSTERS FOR A GROWING,

GREENER MARINE INDUSTRY

Jonas L Nyberg

Managing director west

1-June-2021

WHO IS BERG PROPULSION?

Independent

Founded in 1912

Products

Single campus production

BERG PROPULSION – AZIMUTH THRUSTERS

Three aspects of vessel efficiency

Operation efficiencySystem efficiencyProduct efficiency

Product Efficiency – It all matters

Hydrodynamics

Hydraulics

Slip to idle function

Electric or hydraulic steering

Eliminate external FW cooling

System efficiency – Where to start?

Power first, propeller second

Propeller first, power second

80 mTBollard pull

2525kWEngine

2.8m FPAzimuth thruster

2240kWEngine

3.2m FPAzimuth thruster

System efficiency – Create awareness

Operational efficiency – Right place, right time

10kts for 2h = 100%

8kts for 2,5h = 70%

6kts for 3,5h = 45% Planning ahead, reducing speed, has a dramatic impact on fuel consumption

Sharing data makes for informed decisions and industry progress

We can supply data to

existing systems onboard

or provide solution to get

data to shore.

Connectivity

The information of

equipment status can be

used for operation analysis

and/or condition-based

maintenance

Equipment Status

Our equipment are

prepared for data

connection via Modbus

Data Interface

THANK YOU!

Duncan Payne

Global Ship Support Ltd

Design Manufacture

Installation Operation

MaintenanceTechnical

Support

1. Ship’s operating profile

2. Class requirements

3. Efficiency

4. Prevention of galvanic corrosion,

cavitation & foreign object damage

5. Obsolescence/Supportability

6. Through life costs

1. High quality, durable and reliable

components

2. Modern manufacturing processes

and minimum tolerances

3. Well managed assembly area

4. Comprehensive factory acceptance

test

1. Clean environment – no blasting,

painting, grinding etc. in vicinity

2. Accurate installation records

3. Witness of installation tests

4. Comprehensive harbour/sea acceptance

trials

1. Operator & maintainer training

2. Smooth power delivery

3. Operating parameters accurately

and clearly displayed

4. Remote monitoring of critical

parameters without excessive

alarms

1. Comprehensive & accurate support

documentation such as handbooks,

drawings, parts lists etc.

2. Factory, harbour & sea trial results

3. Condition monitoring methods such as

onboard or cloud-based systems

4. Intrusive maintenance routines align with

dry docking/survey cycle

5. Network of service centres and minimum

lead times for spare parts

1. Regular technical bulletins

2. Well managed supply and

distribution of spare parts

3. Enough competent, reliable and

experienced service engineers

4. Online portals for technical

information & ordering parts

5. Knowledgeable point of contact

6. Accurate OEM records

What should drive advances in

technology to increase efficiency

and reduce emissions?

1. Legislation

2. OEM innovation

3. End user requirements

© Wärtsilä© Wärtsilä1

THRUSTERS: FUTURE - PROOFING YOUR VESSEL AND INVESTMENT

1ST OF JUNE 2021 LAURI TIAINEN DIRECTOR

THRUSTERS AND PROPULSIONCONTROL SYSTEMS

© Wärtsilä

WIDE VARIETY OF MANOUEVRABILITY AND STATION KEEPING NEEDS – FOCUS AREAS

OPEXCAPEX

Pro

duct

Vesselperf

orm

ance

Disclaimer: ship types represented only in illustrative purposes. Does not repsesent policy of any individual company. Courtesy for the copyright owners of the pictures.

© Wärtsilä

PREFERRED STEERABLE THRUSTERS

Trial speed

Fre

esaili

ng

Sta

tion

keepin

g

+15kn

Rough seas

Calm seas

+16kn

+90% of the ships

Hig

h(e

r) t

hru

st

© Wärtsilä

PREFERRED TUNNEL THRUSTERS (0.5 - 5.5MW)

Silent

Harb

our

manoeu

vring

only

Sta

tion

keepin

g

Standard AUX WTT - CP

Standard noise levels

Highest

efficiency

More

opera

tionalhours


© Wärtsilä


Silent

Harb

our

manoeu

vring

only

Sta

tion

keepin

g



Highest

efficiencyCruise AUX WTT - CP

More

opera

tionalhours


CFD tunnel entrance & grid optimization

Oil conditioniong and monitoring

Water lubricated seals

WTT - FP

© Wärtsilä


Silent

Harb

our

manoeu

vring

only

Sta

tion

keepin

g


DP WTT - FP


Highest

efficiencyCruise AUX WTT - CP

More

opera

tionalhours


CFD tunnel entrance & grid optimization

Oil conditioniong and monitoring

Water lubricated seals

© Wärtsilä

REMOTE CONTROL, DIAGNOSTICS AND AUTONOMIC CONTROL SYSTEMS

Redundancy, autonomy & predictability

Com

ple

xity


Wärtsilä ProTouch

Extended

Wärtsilä

ProTouch Basic

Fieldbus

© Wärtsilä

REMOTE CONTROL, DIAGNOSTICS AND AUTONOMIC CONTROL SYSTEMS

Redundancy, autonomy & predictability

Com

ple

xity


Wärtsilä

ProTouch Basic

Fieldbus

Wärtsilä ProTouch

Extended

Like all thrusters in the Wärtsilä Steerable Thruster (WST) series, the Underwater Mountable thrusters have been developed utilising the company’s extensive know-how and experience in thruster design.

Wärtsilä Steerable ThrustersUnderwater Mountable (UWM) Series

The development work has focused particularly on the specific needs of offshore applications in order to provide superior dynamic positioning (DP) and main propulsion performance. The latest computational fluid dynamic (CFD) techniques have been utilised to optimise the design.

The Wärtsilä Underwater Mountable (UWM) Thruster series is designed for use with semi-submersible drilling rigs, drillships and other vessels, such as semi-submersible accommodation rigs, crane vessels and pipe layers, that require thrusters that can be mounted while the vessel is afloat. The UWM series has a high power output of up to 6500 kW, which makes it favourable for use on large offshore construction vessels (OCVs).

The spiral bevel gear-set, which is the heart of the thruster, has been thoroughly reviewed. Not only has the 8° gear angle been included in the gear geometry, the gear application and safety factors have been increased and a high quality gear material has been selected.The pinion is supported on both sides with a new bearing layout that has an increased capacity to accommodate load fluctuations. This has been achieved by applying new roller bearing types in a pre-tensioned bearing configuration.

Pinion Bearing Arrangement

– Extensive measures have been taken to avoid or significantly reduce the effect of load fluctuations. For example, the optimized nozzle and the design of its connections reduce power and thrust fluctuations originating from the rotating propeller.

– Optimal lubrication conditions for the gears and bearings are maintained by the high capacity lubrication system and a redundant propeller shaft seal.

– Optional continuous monitoring of the oil and seals.

Key BenefitsFirst class reliability: Reliability plays an important role in the UWM thruster series.

To achieve a high level of reliability, a series of design features have been incorporated: – The gearset, which is the centre

of the driveline, is designed for smooth running and the optimal transfer of propulsive power.

– The gears and shafts are supported by thoroughly engineered bearing solutions and are enclosed within a sturdy thruster housing designed for stiffness.

With the Wärtsilä PCMS (Propulsion Condition Monitoring Service), the reliability and availability of the thruster can be improved even further. As this service is recognized by the main marine class societies, the thruster overhaul intervals can be extended according to the condition of the equipment. The PCMS is based on a vibration, oil and operational analysis carried out by technical experts from Wärtsilä Services.

High efficiency: The UWM thruster series features the Wärtsilä thruster nozzle to provide excellent bollard pull performance. The propeller, nozzle,

Straight unit.Interaction of jet with hull due to divering jet.

Thrust Drag

8 degree tilted unit.No interaction of jet with hull.

Comparison of thrust availability for a semi-submersible rig equipped with 8 thrusters. The red area shows the thrust availability in case of non-tilted thrusters, the blue area shows the available thrust in case of Wärtsilä Steerable Thrusters with an 8 degree downward tilt. Depending on the angle in which the thrust is directed, up to 35% more thrust is available for the rig equipped with the 8 degree tilted thrusters.

gearbox housing and the nozzle connection, are designed to achieve high hydrodynamic efficiency. In transit free-sailing condition, the Wärtsilä thruster nozzle develops a greater thrust due to its improved power absorption. As a consequence, the need for overspeed is reduced. With three propeller diameter choices and different power levels, the UWM thruster series can offer a tailor-made solution to meet customer requirements regarding, for example, bollard pull or vessel propeller size limitations.

Effective DP operations: The three thrusters within the Wärtsilä UWM series all feature an 8 degree tilted propeller shaft, which has been achieved by applying a gear that includes the tilt instead of a bevel gear set. Extensive CFD calculations prove that the 8 degree tilting of the propeller shaft and the nozzle has several advantages, the chief of which is that the propeller jet is directed away from the hull and other thrusters in the vicinity. In addition to reducing hull interaction losses, this also greatly reduces interaction between the thrusters, thus making the so-called ‘forbidden zones’ considerably smaller. The overall gain in available bollard pull thrust for dynamic positioning operations is about 15% when compared to conventional units.

Due to the optimal alignment of the propeller shaft and the nozzle in the tilted configuration, a higher propulsion efficiency and more overall thrust is provided when compared to solutions with non-tilted nozzles. The combination of more effective DP operations and high overall efficiency results in reduced fuel consumption and lower operating costs.

WÄRTSILÄ® is a registered trademark. Copyright © 2017 Wärtsilä Corporation.Specifications are subject to change without prior notice.

www.wartsila.com

Compact and with less weight: Detailed FEM analyses have been made to optimize the strength of the components so as to keep the overall weight as low as possible. Additionally, the efficient closed-loop electro-hydraulic steering has compact dimensions and less weight since only a small reservoir is needed for the hydraulic oil. The compact dimensions result in less space requirements in the thruster room and more payload capacity for the vessel.

Easy installation: All necessary interfaces are contained within the thruster well, which can be installed by welding without additional machining. The lubrication and steering hydraulics are delivered in frames with standard interfacing. Field-bus connections are used to connect the thruster and its auxiliary systems to the Wärtsilä Propulsion Control System. The underwater mounting system, the hydraulics, and the controls are all designed to minimize the installation time and efforts of the yard.

Dimensions and weights

Type A mm

B mm

C mm

M mm

L mm

H mm

Outboard part1 Well2 kgdry kg in water kg

WST-45U 3600 3300 2518 2324 2570 1242 51000 34500 9500

WST-55U 3900 3625 2648 2516 2763 1390 63500 31800 11900

WST-65U 4200 3820 3006 2719 3025 1390 77500 49500 13200

1) With oil 2) Including top cover, bottom cover, pipe covers, valves and position sensor

Main technical data

Type Input speed rpm

Power * kW

Propeller diameter mm Tilt

WST-45U 720 600

4000 4500 3600 8°

WST-55U 720 600

4500 5500 3900 8°

WST-65U 720 600

5500 6500 4200 8°

* The maximum power level depends on input speed and is given for dynamic positioning (DP) application.

The UWM thruster series includes the Wärtsilä WST-45U and WST-55U steerable thrusters, as well as the largest model, the Wärtsilä WST-65U. The maximum power levels are 4500, 5500, and 6500 kW respectively.

By providing two propeller diameter options for the most common power levels of 4500 and 5500 kW, the UWM series provides options for high bollard pull and specific propeller diameter requirements.

Technical Specifications

Wärtsilä Steerable Thrusters

The Wärtsilä Steerable Thruster (WST) has been developed in parallel with the latest operating demands for tugs, river-going vessels, and various offshore support vessels.

The aim, as with all Wärtsilä products and solutions, is to ensure optimal efficiency, high hydrodynamic performance, less maintenance and better accessibility for serviceability. With eight thruster types, ranging from 700 to 3200 kW, the WST enables these vessels to meet and exceed the performance levels required for today’s competitive operating environment. By maintaining outstanding efficiency at different power outputs, the WST reduces costs for owners and operators. The design also allows easier and faster installation, thereby saving time and costs for the yard.

Designed to Meet the Latest Customer NeedsSuperior performance: Large propellers with a tailored design, a smooth housing shape and slender nozzle connections ensure the superior performance of the Wärtsilä Steerable Thrusters. The hydrodynamic design has been thoroughly optimized, with the use of Wärtsilä’s extensive design experience combined with computational fluid dynamics (CFD) capabilities. Since not all vessel performance requirements are the same, the WST comes with a choice of two nozzle types.

– Bollard pull nozzle: A nozzle optimised for bollard pull, providing outstanding performance at zero knots vessel speed.

– Free sailing nozzle: this shorter and lighter nozzle version is designed for free sailing efficiency at speeds of 10-14 knots, whilst keeping good bollard pull capabilities at low vessel speeds.

WST combines its excellent bollard pull capabilities with continuous steering over 360°, to provide maximum thrust in any direction.

Wärtsilä Thruster Nozzle (WTN) optimised for bollard pull

High-speed engine compatible: The Wärtsilä Steerable Thruster fits well with Wärtsilä’s own medium-speed engines and is also compatible with high-speed engines of other brands. With a selected range of gear ratios, all common engine speeds between 750 and 1800 rpm can be accommodated, as well as electric motors with speeds between 720 and 1200 rpm.

Efficiency: A high level of manoeuverability is essential, and the WST is designed to achieve this with an optimal hydrodynamic efficiency. All functionality provided by the individual components of the steerable thruster, the propeller, the engine, the clutch to control the thrust and the steering system is combined in an integrated design that attains overall high efficiency with the desired manoeuvrability. At the same time, the system is simple, straightforward and reliable.

Robust & reliable: Since operational reliability is important, Wärtsilä places high priority on the robustness of all components used in its products and solutions.

Environmental performance: At the same time, the thrusters come with an advanced sealing system that includes functionality for seal monitoring. The Wärtsilä Steerable Thrusters are suitable to be operated in US inland and coastal waters under the US EPA VGP2013 regulations. Compliance is achieved by using either environmentally acceptable lubricants (EAL) or barrier seal solutions, depending on thruster size and propeller type.

Installation flexibility: The WST can be installed and mounted in various ways. These include bolt-in (standard) and weld-in possibilities with easy to install hull fairing. This flexibility, together with the option to incline the thruster to align it with the hull, enables optimal positioning of the thruster with regard to thrust performance and system layout. Mounting from above (can-mounted), below or split mounting allows the yard to optimise the building scheme.

Similarly, the high level of integration eases the installation at the yard.

Compact & integrated: By integrating all the auxiliary equipment needed to operate the thruster, such as the hydraulics for the clutch and the lubrication and steering systems, onto the top plate around the upper gearbox of the mechanical Z-drive system, a truly compact solution is achieved. This means that less thruster room space is needed. The modular design also allows the same compact and integrated layout for thruster variants with controllable pitch propellers that have additional pitch hydraulics. In case of a diesel-electric propulsion system, a thruster configuration with electrical steering and an electric lubrication pump set is available.

Wärtsilä ProTouch Steerable thruster lever and side display

Wärtsilä Steerable Thruster with PTO for diesel-mechanical drive

User friendly controls: The thrust, steering, and auxiliary system functions are all controlled by the Wärtsilä Propulsion Control System. The ProTouch panel design is space saving and designed to allow easier and more intuitive operation of the thruster functions. Installation of the control cabinets, panels and cabling is straightforward since all components of the propulsion control system are interconnected by means of CAN-open buses.

Ice Class: The increasing demand for thrusters with ice class is included in the design of the Wärtsilä Steerable Thruster. Ice Class can be specified for winter sea conditions or to provide extra robustness to withstand impacts, such as from driftwood. The thrusters are compatible with Finnish-Swedish Baltic Ice Class, Russian Ice class (RMRS), and Russian river ice class (RRR). The Finnish-Swedish Ice Class (FSIC) rules are implemented in the rules of many major classification societies.

Wärtsilä ServicesEasier maintenance: The WST has been developed to be maintenance friendly, for example, the seals of both the propeller shaft and the steering mechanism can be replaced without de-assembling the thruster.

The Wärtsilä WST is supplied with a detailed maintenance information document which clearly defines the maintenance task in easy steps for operators.

Wärtsilä can provide spare parts packages which are pre-defined according to the desired redundancy levels by the owner/operator along with the required technical support and field services.

Wärtsilä can also offer customer friendly long term concepts to optimize the maintenance and operations of their installations, this allows the customers to focus on generating the maximum revenue from their operations, leaving behind their equipment worries to us. In combination with Wärtsilä PCMS (Propulsion Condition Monitoring Service), downtime and maintenance costs can be minimised.

We offer a worldwide service network that ensures reliable and efficient support, and the quickest possible solution to any problem, during the full operational lifetime of your equipment.

Our Services organization currently features more than 11,000 dedicated professionals in 70 countries. Wärtsilä adds value to your business at every stage in the lifecycle of your installation. With us as your service partner, you receive many measurable benefits such as availability and performance, productivity gains and cost benefits. Above all, peace of mind in the knowledge that your installation is being serviced by the most experienced partner you could have – Wärtsilä.

500 1000 1500 2000 2500 3000

Power range (kW)

WST-11

WST-14

WST-16

WST-18

WST-21

WST-24

WST-28

WST-32

Wärtsilä Steerable Thrusters range


www.wartsila.com

09.2

017

WST with slipping clutch and PTO for diesel-mechanical drive

WST with electrical steering for diesel-electric drive

Bollard Pull performance of Wärtsilä Steerable Thrusters

Thruster type

Engine power (2)

(kW)

Input speed (rpm)

Propeller diameter (mm)

Bollard pull (1) (tonnes)

WST-11 900

7501000120016001800

1600 301050 1800 36

WST-14 1150 1800 391275 1900 431350 2000 46

WST-16 1400 2000 471600 2200 55

WST-18 1700 2200 571800 2400 63

WST-21 2050 2400 692100 2600 73

WST-24 2400 2600 802400 2800 84

WST-28 2800

72010001200

2800 942800 3000 97

WST-32 3200 3000 1073200 3200 111

1) Based on two thrusters, 100% power, FP propeller with pitch and nozzle designed for bollard pull and including thrust deduction. 2) In case of ice class notation, maximum power level is reduced.

Wärtsilä Steerable Thrusters dimensions (mm)

Thruster Type

Dimensions

Weight1

(kg)

Weld-in Bolt-in

PAL options D (mm)A (mm)

ØB (mm) (well diameter (mm))

WST-11 1600 1942

(2000)1948(2000) 2400 2700 10000/11800

1800

WST-14 1800

1942(2000)

1948(2000) 2500 2800 10900/12860 1900

2000

WST-16 2000 2342

(2400)2326(2400) 2800 3150 17050/20400

2200

WST-18 2200 2342

(2400)2326(2400) 2900 3250 18600/21950

2400

WST-21 2400 2542

(2600)2512(2600) 3200 3500 24800/27500

2600

WST-24 2600 2692

(2750)2660(2750) 3500 3800 28500/31500

2800

WST-28 2800 2862

(2920)2825(2920) 3900 4200 32800/36100

3000

WST-323000 3042

(3100)3000(3100) 4000 4500 37000/41000

32001) Estimated minimum (FPP and smallest prop / nozzle / propeller arm length (PAL)) and maximum (CPP and biggest prop / nozzle / PAL) weights

These tables only address the Wärtsilä Steerable Thrusters up to 3200 kW. For other power ratings, please contact www.wartsila.com or your nearest Wärtsilä sales office.

Royal Caribbean’s ‘Oasis of the Seas’ has Wärtsilä 5500kWtransverse thrusters (4x)

Excellent thrust performance for efficient operations

The Wärtsilä Transverse Thruster (WTT) series addresses the need to provide efficient and reliable hydrodynamic performance with less maintenance and simplified installation.

The WTTs are tailor designed for the customers’ needs. They feature high thrust values creating rapid response required for efficient mooring and ma-noeuvring, their compact dimensions and light weight simplify integration with the vessel design. The Wärtsilä Dynamic Positioning (DP) solution ensures excellent station keeping, especially important in offshore opera-tions and for cruise ships in locations where anchoring is not possible or prohibited.

Wärtsilä has delivered over 3200 transverse thrusters globally. When choosing a Wärtsilä Transverse Thruster you are getting inbuilt experi-ence and reliability to maximise the efficiency of your operations.

The WTT can be provided with ei-ther a Controllable Pitch (CP) or Fixed Pitch (FP) propeller. In the standard configuration, the E-motor foundation is built on the tunnel, as are the inte-grated hydraulics. Separately mount-ed E-motors, hydraulics, as well as redundant pump sets and filters are

optional. Special configurations, such as horizontal drive, low noise, and vertical or inboard demountable ver-sions are also available.

Wärtsilä’s commitment to creat-ing added value for its customers begins with discussions during the early stage of every project to pre-cisely evaluate the operational needs of the vessel. We have the experience and in-house expertise to design and engineer the thruster arrangement that will provide optimal efficiency and lower operating costs.

— Transverse Thrusters covering the range from 500KW- 5500KW — Wide range of applications: merchant, offshore, cruise and ferry as well as other vessel types — Supporting manoeuvring, mooring operations, station keeping and dynamic positioning — Reliable and durable — Low noise and vibration — Maintenance friendly design — Easy to install — Available with CP or FP propeller — Compliant with EPA VGP 2013 regulations

Viking Grace

Multiple sizes and configurations to suit all vessel applicationsThe WTT is available in 14 power sizes, from 500 to 5500 kW, for both bow and stern applications in vessels of all types. Wärtsilä’s extensive experience with propeller design and tunnel optimisa-tions using computational fluid dynamics (CFD) analysis is the key to providing the most appropriate solution with regard to propulsion performance, efficiency, and the minimisation of noise and vibration.

OWNER/OPERATOR BENEFITS z Reliability: The WTT is robust and compactly designed with fewer components and integrated hy-draulics to minimise the risk of fail-ure during its service life. It is built to the highest quality standards, with full electrical insulation, load optimised gears, quality bearings, and fine lubrication oil filtering.

z User friendly: Easy access for maintenance is achieved through the WTT’s compact and clever design. All components requir-ing periodic maintenance are in a single location. The space require-ment for panels and cabinets can be as much as 50% less than for conventional thrusters.

z Propulsion Control Systems: The Wärtsilä Propulsion Control system (PCS) with Pro-touch This award winning system com-prises a comprehensive set of levers, touch-screen interfaces, displays, indicators and modules and can be configured to suit any propulsion. For each propulsor the rpm and, with CP propellers, the pitch are controlled using the ProTouch lever, while the vital functions of auxiliary systems can be monitored and controlled via the touch screen side panel. The interface language can be selected, as can special functions such as a pitch to zero system. External interfaces, for example to the voy-

age data recorder (VDR) or dy-namic positioning (DP) system, are available. The Wärtsilä PCS with ProTouch provides the operator with an intuitive, safe, and easy-to-use control system that requires significantly less space for the bridge control stations. Standard Control Systems The analogue LIPSTRONIC® 7000-TTb remote control system can be customised to specific vessel needs, and consists of a

Viking Grace

Normand Installer El Coquí and Taíno

thruster control cabinet (TCU), le-vers, and tailored control panels to interface with the thruster. A pitch to zero system or interfaces to ex-ternal systems can also be config-ured within the LIPSTRONIC®.

z Environmentally friendly: The WTT is compliant with the US Environmental Protection Agen-cy’s (EPA) Vessel General Permit (VGP) 2013 regulation pertaining to discharges to the sea. This is achieved through the use of Envi-ronmentally Acceptable Lubricants (EALs).

z Integrated hydraulics: Wärtsilä Transverse Thrusters have an inte-grated hydraulics system for lubrica-tion and pitch setting. This integrat-ed system provides greater reliability and simpler maintainability. It can be configured to match requirements for pump redundancy, duplex filters, and resilient mounting.

SHIPYARD BENEFITS z Simplified installation & com-missioning: Each WTT is supplied with an extensive installation and planning instruction document (IPI), which aids the shipyard in the in-stallation of the thruster with data, diagrams, and clear instructions with graphical views. The WTT requires a minimal number of welds to the hull structure, and has fewer pipes to be flushed and installed. No HPU foundation needs to be designed, and only in the case of a DP application for thruster sizes WTT-28 and up, there is a cooler to be connected. The connection to the propulsion control system and panels is via CAN-bus (PCS/ProTouch). The overall compact-

ness and lighter weight compared to conventional thrusters mean that less space is needed. The instal-lation is, therefore, faster and less costly.

z Easier Integration: The integrated hydraulics arrangement saves not only space, but also installation and commissioning time. The hy-draulics are integrated onto the E-motor foundation, with the thruster gearbox functioning as the oil tank, thereby eliminating the conven-tional stand-alone hydraulic power unit (HPU). Being pre-installed, the yard’s involvement in engineering and installation is minimised, as is the testing and adjusting during commissioning.

SPECIALISTS IN PROPULSION MACHINERYWärtsilä has the broadest and most complete offering of products, sys-tems and integrated solutions in the global marine industry. We continue to lead the way in innovations that create greater efficiencies, improved safety, and more environmental sus-tainability.

We offer single-source supplies for all propulsion applications, including motors, gearboxes, propellers, seals and bearings, and of course, a com-plete range of thrusters. We realise that the industry is not standing still and that as needs change, so too must the products that drive the vessels. Ships are getting bigger, most notably with container ships and in the cruise industry, but also in other sectors as well. This is why the WTT series has been developed as a next generation solution to provide greater power and better efficiency for ships of all types.

WÄRTSILÄ SERVICESThe Wärtsilä WTT is supplied with a detailed maintenance information document which clearly defines each maintenance task in easy steps so that even personnel with very basic skills can manage.

Wärtsilä can provide spare part packages that are pre-defined ac-cording to the desired redundancy levels by the owner/operator, along with the required technical support and field services.

Wärtsilä can also offer customers convenient long term concepts to optimise the maintenance and opera-tions of their installations. This allows the customer to focus on generating the maximum revenue from their core operations, while leaving the equip-ment worries to us.

We offer a worldwide service network that ensures reliable and efficient support, and the quickest possible solution to any problem, dur-ing the full operational lifetime of your equipment.

Our Services organization currently features more than 11,000 dedicated professionals in 70 countries. Wärtsilä adds value to your business at every stage in the lifecycle of your installa-tion. With us as your service partner you receive many measurable ben-efits, such as availability and perfor-mance, productivity gains, and cost benefits. Above all, you have peace of mind in the knowledge that your installation is being serviced by the most experienced partner you could have – Wärtsilä.

www.wartsila.com


STANDARD PRODUCT CONFIGURATION: z Controllable pitch (CP) or Fixed pitch (FP) propeller z Remote control system consisting of a propulsion control cabinet (thruster room) and a lever with side display for mounting on the bridge; (the remote control system is standard for thrusters with CP propellers or for DP application; available on request for AUX thrusters with FP propellers)

z Mild steel tunnel with foundation suitable for vertical mounting of the E-motor (L-drive configuration)

z Electrically insulated coupling with flange suitable for keyless shrink fit mounting on the E-motor shaft

z Integrated hydraulics mounted on the tunnel (versions with CP propeller and/or DP application) and separate pump starter

z Gravity header tank z Standard length tunnel with 3 circular stiffeners and a stainless steel ring at the location of the propeller

z Aluminium anodes for 5 year protection

OTHER PRODUCT CONFIGURATIONS: z L-drive with intermediate shaft and vertical E-motor mounted on a separate motor foundation

z Configurations such as horizontal drive, low noise, and vertical or inboard demountable versions are available on request

OPTIONAL z Remote control system with multiple control stations (e.g. engine control room, bridge wings), control transfer functionality, multifunctional display, and/or interfaces with other vessel automation systems

z Compatible with environmentally acceptable lubricant (EAL) to comply with US EPA VGP 2013 or other environmental regulations

z Redundant pitch/lubrication pump set z Redundant oil filter z Standalone hydraulic system z Pressurised header tank z Header tank with integrated EnduraPac water separator (available for pressurized and non-pressurized systems)

z Tunnel with a mild steel ring instead of a stainless steel ring at the location of the propeller

z Additional circular or longitudinal stiffeners z Lengthened tunnel and/or tunnel ends cut according to hull form

z Aluminium anodes for 2 year protection z Shaft holding brake.

WÄRTSILÄ TRANSVERSE THRUSTERS DIMENSIONS

Thruster type

Maximum Power 1 Manoeuvring

AUX (kW)

Dynamic Positioning

DP (kW)

Propeller Diameter (D) (mm)

Length (L) (mm)

Weight 2(kg)

CT/FT 125 H 614 603 1250 1550 2820

CT/FT 150 H 880 789 1500 1800 4200

WTT-11 1100 1000 1750 1970 5672

WTT-14 1450 1300 2000 2195 8050

WTT-16 1650 1475 2200 2115 11300

WTT-18 1850 1825 2200 2275 12250

WTT-21 2100 1825 2400 2275 12975

WTT-24 2400 2150 2600 2390 13775

WTT-28 2800 2400 2800 2970 20029

WTT-32 3200 2800 3000 3150 25142

WTT-36 3600 3200 3200 3350 29530

WTT-40 4000 3600 3400 3520 30500

WTT-45 3 4500 4050 3600 39504 353504

WTT-55 3 5500 4900 4000 43004 476504

1 Maximum power level is valid for uni-directional rotation (CPP). Depending on propeller type, net frequency and class society, different power levels may apply.2 Version with CP propeller including a standard tunnel with E-motor support, excluding E-motor.3 Available on request. 4 Preliminary values.

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Thrusters: future-proofing your vessel and investment

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