azipodshippropulsion
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rahulrshenoy
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#1
11-07-2010, 10:01 PM


hello sir
i am btech student . i would like
to know about azipod ship propulsion
system including drawings.
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project report helper
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#2
22-09-2010, 03:43 PM

More Info About azipodshippropulsion



Actyally the Azipod is the registered brand name of the ABB Group for their azimuth thruster. Originally developed in Finland jointly by Kvaerner Masa-Yards dockyards and ABB, these are marine propulsion units consisting of electrically driven propellers mounted on a steerable pod.

The pod's propeller usually faces forward because in this puller (or tractor) configuration the propeller is more efficient. Because it can rotate around its mount axis, the pod can apply its thrust in any direction. Azimuth thrusters allow ships to be more maneuverable and enable them to travel backward nearly as efficiently as they can travel forward



Azipod concept

In the traditional azimuth propulsion system the motor is located inside the ship's hull and rotation is transferred to the propeller through shafts and gearboxes. In the Azipod system the electric motor is installed inside the pod itself, and the propeller is connected directly to the motor shaft. By not using a traditional propeller shaft the propeller can be located farther below the stern of the ship in a clear flow of water providing greater hydrodynamic and mechanical efficiency.

Electric power for the Azipod motor is conducted through slip rings that allow the Azipod to rotate through 360 degrees. Because fixed pitch propellers are used in Azipods, power for an Azipod system is always fed through a variable-frequency drive or cycloconverter that allows speed and direction control of the propulsion motors.


refered by en.wikipediawiki/Azipod


More Info About azipodshippropulsion


Actually the azipod is the registered brand name of the ABB Group for their azimuth thruster. Originally developed in Finland jointly by Kvaerner Masa-Yards dockyards and ABB, these are marine propulsion units consisting of electrically driven propellers mounted on a steerable pod.

The pod's propeller usually faces forward because in this puller (or tractor) configuration the propeller is more efficient. Because it can rotate around its mount axis, the pod can apply its thrust in any direction. Azimuth thrusters allow ships to be more maneuverable and enable them to travel backward nearly as efficiently as they can travel forward


Azipod concept

In the traditional azimuth propulsion system the motor is located inside the ship's hull and rotation is transferred to the propeller through shafts and gearboxes. In the Azipod system the electric motor is installed inside the pod itself, and the propeller is connected directly to the motor shaft. By not using a traditional propeller shaft the propeller can be located farther below the stern of the ship in a clear flow of water providing greater hydrodynamic and mechanical efficiency.

Electric power for the Azipod motor is conducted through slip rings that allow the Azipod to rotate through 360 degrees. Because fixed pitch propellers are used in Azipods, power for an Azipod system is always fed through a variable-frequency drive or cycloconverter that allows speed and direction control of the propulsion motors.



en.wikipediawiki/Azipod
More Info About azipodshippropulsion


Actually the Azipod is the registered brand name of the ABB Group for their azimuth thruster. Originally developed in Finland jointly by Kvaerner Masa-Yards dockyards and ABB, these are marine propulsion units consisting of electrically driven propellers mounted on a steerable pod.

The pod's propeller usually faces forward because in this puller (or tractor) configuration the propeller is more ef ficient. Because it can rotate around its mount axis, the pod can apply its thrust in any direction. Azimuth thrusters allow ships to be more maneuverable and enable them to travel backward nearly as efficiently as they can travel forward



Azipod concept

In the traditional azimuth propulsion system the motor is located inside the ship's hull and rotation is transferred to the propeller through shafts and gearboxes. In the Azipod system the electric motor is installed inside the pod itself, and the propeller is connected directly to the motor shaft. By not using a traditional propeller shaft the propeller can be located farther below the stern of the ship in a clear flow of water providing greater hydrodynamic and mechanical efficiency.

Electric power for the Azipod motor is conducted through slip rings that allow the Azipod to rotate through 360 degrees. Because fixed pitch propellers are used in Azipods, power for an Azipod system is always fed through a variable-frequency drive or cycloconverter that allows speed and direction control of the propulsion motors.


en.wikipediawiki/Azipod
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summer project pal
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#3
10-01-2011, 10:01 PM

AZIPOD
BY
SUDEEP SASI
S7 MA
ROLL NO 56


.ppt   SEM PRES1.ppt (Size: 6.69 MB / Downloads: 244)

Introduction – History & Development

An Azipod or podded propulsor to give it its technical name is a propulsion or manoeuvring device that is external to the ship’s hull and houses a propeller powering capability. This definition differentiates them from azimuthing thrusters which have their powering machinery within the hull and usually drive the propellerthrough a system of shafts and gearing.

TYPICAL AZIMUTHING PROPULSOR POD

POD INTERNALS
ARRANGEMENT – POD HOUSING
Slewing ring for a 7.5MW azipod


Electrical Propulsion
PROPULSION SYSTEM DESIGN
INTEGRATED ELECTRICAL POD PROPULSION
DESIGN FLEXIBILITY

Design Benefits

• Smaller casing

• Added cargo volume

• Smaller vessel

• Low weight

• One-lift installation of Azipod


QUEEN MARY II – FITTING OF PODS
Different Makes of Pods


High demand of station-keeping & DP operation


ICE BREAKERS
Significant and rapid load variation – almost
shock loading
High dynamic performance required –tripping
undesirable
High torque at low speed
Typical propulsion power 5 – 55 MW
depending on ice-breaking capability
High manoeuvrability
ICE BREAKERS





Constructional Benefits



Simplified steel structure
No aligning of shafts and bearings
One-lift installation of the Azipod unit
Building time in dry-dock is reduced


Hydrodynamics

Excellent wake field leads to: Improved hydrodynamic efficiency (an 8%improvement was recorded on Elation)
Less cavitation
Reduced propeller induced vibrations
Reduced noise levels


Disadvantages of azipods

High initial capital cost
Substantial cost of repairs
Vessel crew training for new equipment
Technology still needs to be made reliable and more predictable
New ports may include new problems.



The Future?
Continued development of Azipods and other similar systems

More power, greater efficiency, improving reliability, better
hydrodynamics, etc

ABB’s CRP Azipod concept utilises a conventional shafted
propeller with an azipod immediately aft of it

Combines different power sources so if one fails then the
other still provides propulsion

Expected to be more economical for large vessels e.g new
generation large Container ships

CRP




Generally successful propulsion and manoeuvring system
Particularly popular with cruise ship operators
Expect increasing use of azipods on numbers and types of
future vessels
Susceptible to contact damage due to external position
Susceptible to some bearing, electrical and seal problems
Continuing development should reduce early problems
Expensive to repair – specialist repairs by manufacturers
Any failures - very expensive in cancelled cruises
REFERENCES
abb.com
marinelog.com
hightechnologyfinland.com

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