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 * Products
 * Segments
    * Our segments
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    * Fisheries & Aquaculture
    * Naval & Coast Guard
    * Offshore Oil & Gas
    * Offshore Wind
    * Passenger
    * Research
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 * Services
    * All services
    * Training courses
    * Ship Design
    * Conversions, retrofits and refit
    * Hydrodynamic Research Centre
    * Online Services
    * Engineering and Services
    * Product recycling
   
   
 * Support
    * Support
    * Product Support A-Z
    * KM-Support App
    * Request spare parts
    * Remote support
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KONGSBERG.COM

 1. Kongsberg Maritime
 2. Products
 3. Propulsors & Propulsion
 4. Thrusters
 5. Arctic Thruster


ARCTIC THRUSTER


ARCTIC THRUSTER

An Arctic Thruster (ARC) unit is a mechanical azimuthing thruster and it is
available in both pulling and pushing versions. The ARC thruster family has a
robust design which is ideal for artic ice conditions. The first ARC thrusters
were delivered in 1992. Polar Class 2 and Icebreaker 7 rules are met up to a
power rating of 9MW. The design for the ARC unit has been reviewed and modified
according to the latest requirements in 2021.


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ENVIRONMENTAL REQUIREMENTS

KONGSBERG has concentrated on developing zero emission sealing solutions for
several years and has built a test rig for steering tube and propeller shaft
seals to fulfil increasing environmental requirements such as Vessel General
Permit (VGP). Numerous tests of the different sealing options have been
successfully performed and the concepts carefully validated.

Based on the acquired knowledge, new ARC thrusters have no oil-to-sea interfaces
and outer dynamic seals (propeller shaft and steering tube seals) have a cavity
for monitoring seal performance. This can be visually inspected and monitored
automatically. Since the oil-to-sea interfaces have been eliminated, mineral
oils can be used. The propeller shaft seal has also adaptive seal pressurization
and it will run in optimal condition no matter what the vessel draught or speed
is. All lips of the seal are kept in an optimal condition and therefore wear is
minimized.

The propeller shaft seal is an air seal and the steering tube seal is a void
type seal. Both seal types eliminate the possibility of oil discharging into the
surrounding waters. The seals function by having two independent sealing
systems; one on the side of the seal facing oil, and one on the side of the seal
facing water. An air chamber (propeller shaft seal) or a void space (steering
tube seal) in between these two seals creates a controlled "buffer zone" where
any possible oil or water is collected and conveyed up to thruster room where
the fluid can be evacuated to the ship’s waste fluid tank.

MAIN FEATURES:

 * Pulling or Pushing
 * With ducted or open propeller
 * Optimal for heavy ice conditions

MAIN BENEFITS:

 * Fulfils the strictest environmental requirements
 * Worldwide Service Network
 * Digital Twin
 * Internal condition monitoring

 * 
 * 
 * 


TECHNICAL DATA

Ice Class Thruster Design

  ARC 0.5 ARC 0.8 ARC 1.0 ARC 1.2 Input power range (KW) 3000-4500 4500-6000
6000-7500 7500-9000 Input speed (RPM) 0-720 0-600 0-600 0-600 Prop speed (RPM)
0-173 0-143 0-143 0-135 Prop dia. (m) 3.2-3.8 3.8-4.1 4.1-4.5 4.5-4.8 Dry weight
(t) 85-100 160-170 170-180 185-200


NOZZLE

The ARC family is available with a ducted (with a nozzle) or an open propeller.
The use of a nozzle will provide an increased amount of thrust at low speeds and
bollard pull condition. The ducted ARC thruster is chosen when utmost thrust,
and effective channel widening is needed.

The ARC unit is available in both pulling and pushing versions

Ice milling using an open pushing propeller is done in the reversed rotation
mode by using the propeller trailing edge. This reduces the required torque
significantly, as the cutting is done by the sharp edge and the loads will be
lower. In forward rotation mode the thruster leg protects the propeller from ice
impacts.

ARC units with an open pulling propeller are typically more efficient when used
in free running applications. Ice milling with a pulling propeller is done in
ahead and astern direction cutting with the propeller leading edge, without the
need to change the propeller rotation. When operating astern the unit is rotated
through 180 degrees.


KONGSBERG ARCTIC SOLUTIONS

Arctic and multi-functional vessels are unique and often have unique features.
KONGSBERG has the most comprehensive portfolio of propulsion products and the
ability to provide optimal solutions and combinations for artic operations.

For example, when excellent channel widening features are required an ARC unit
can be equipped with a nozzle to enhance the thrust and let a traditional shaft
line propeller function as the main propulsor. In that way it is possible to
manage steering, channel widening and get an efficient forward thrust at the
same time.

Condition Monitoring System (CMS) and Remaining Useful Lifetime (RUL)

Digital Twin predicts remaining lifetime of the thruster and it is available for
both drive train and frame, where it can also operate as a sensor for the vessel
operation condition. Condition monitoring is giving the insight of present
condition of the equipment.

Request information


SERVICES AND SUPPORT


 * 24/7 TECHNICAL SUPPORT
   
   Our 24/7 technical support team is there to help at any time, day or night,
   wherever your vessel is.
   
    * Contact form


 * CONVERSIONS, RETROFIT AND REFIT
   
   We understand the importance of having the right parts, available in the
   right place, at the right time.
   
    * Find more info here


 * TRAINING
   
   Ensure that your crew is properly and thoroughly trained. This will reduce
   operational risk, downtime and maximise return on asset investment.
   
    * Learn more


HOW CAN I HELP YOU?


CONTACT US


Send email
+47 32 28 50 00


FACT SHEETS

 * Arctic thruster (ARC)




BY YOUR SIDE, WORLDWIDE:

Our Global Customer Support works 24/7 to provide prompt responses, technical
expertise and global assistance from key locations in 32 countries.

EMEA: +47 33 03 24 07
APAC: +65 97 11 24 07
AMERICAS: +15 04 303 5244
E-mail: km.support@km.kongsberg.com

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