Propulsion for Cruise Liners and Ferries Further details about Propulsion Systems for Cruise Liners and Ferries : Brochures: Diesel-Electric Podded Propulsion Drive for Cruise Liner "Seven Seas Voyager" - 16 Pages

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Propulsion for Cruise Liners and Ferries   Further details about Propulsion Systems for Cruise Liners and Ferries :  Brochures:  Diesel-Electric Podded Propulsion Drive for Cruise Liner "Seven Seas Voyager"
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Catalogue excerpts

Podded Propulsion Drive for Cruise Liner “Seven Seas Voyager”

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Podded Propulsion Drive The high luxury class cruise liner "Seven Seas Voyager" built at the Italian T. Mariotti shipyard in Genoa is managed by V. Ships Leisure in Monaco and operated by Celtic Pacific (UK) Ltd. on behalf of Radisson Seven Seas Cruises (RSSC). She is eguipped with the DOLPHIN podded propulsion system developed in co-operation by SAM Electronics in Hamburg (D), John Crane-Lips SAM Electronics was selected by ship yard and owner to supply the following systems: ■ Propulsion system with DOLPHIN podded ■ Bow thruster system with propulsion ■ Remote control system with joystick and machine...

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Power Supply System The necessary energy for the propulsion and the air conditioning drives as well as for the mains is generated by four diesel alternators which supply the two high voltage propulsion switchboards equipped with SF6 circuit breakers. Via eight transformers the different low voltage networks are supplied from the high voltage propulsion mains. Interconnections between the different low voltage boards allow a supply of all consumers also in case of a transformer failure. 7200 kVA, cos = 0,8, 600 RPM D/G-3 The high voltage propulsion system is resistor grounded for continuous operation...

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Podded Propulsion Drive Propulsion Drives The two propellers are driven by synchronous motors mounted in the underwater compartment of the pods. As usual for podded drives, the propeller is directly mounted onto the motor shaft. The propulsion motors are designed maintenance friendly with asynchronous exciter for brushless excitation. The stators are equipped with two galvanic separated 3-phase windings systems with 30° phase shifting for 12-pulses motor supply. This secures excellent torque characteristics of the propulsion motors with low torque harmonics in the air gap and low noise operation....

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The harmonics generated by the synchro-converters are reduced to admissible levels according to the classification rules and the design regulations for faultless operation of the sensitive consumers. The following measures are provided for a voltage total harmonic content (THD) of 5%: drives to the mains if both propulsion motor operation if only one winding system is operated). For that each synchro-converter is supplied via two propulsion transformers each with two secondary windings with 30° phase shifting and ± 7,5° additionally phase deviation for 15° phase shifting between two propulsion...

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Podded Propulsion Drive DOLPHIN Pod The DOLPHIN podded propulsion system with its electrical, mechanical and hydromechanical parts has been developed in co-operation by SAM Electronics and John Crane-Lips Netherlands with the input of the extensive experience with propulsion systems, propeller hydrodynamics and steerable thrusters. The special motor design is done by VEM Sachsenwerk in Dresden. Pod Overview Three main parts can be distinguished when looking at the mechanical and hydrodynamical part of the DOLPHIN. First is the underwater part of the DOLPHIN, the actual pod, combining the synchronous...

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Hydrodynamics Several model test series have been carried out to define a shape with an optimal efficiency. CFD calculations have been made to investigate the flow and pressure pattern around the pod. The actual cavitation tests show that the pulling propeller for this application is free of cavitation and that the pressure pulse levels on the hull are very low. During the various sets of model tests, the loads by both the propeller and the complete pod housing have been investigated to support the calculation method for the pod and its drive components. To achieve this, a unique test set-up was...

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Podded Propulsion Drive DOLPHIN Pod Steel Construction The pod housing is designed as a welded steel construction. To validate the construction elements, a FEM model was made that describes the pod construction in detail. The internal loads on the pod housing by the internal components and the external (hydrodynamic) loads have also been modelled and serve as the input for the FEM model. Several iterations with small corrections of both the actual construction and the FEM model have lead to a solid construction, that under all circumstances forms a safe platform for the components it encloses...

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Azimuth Steering System The steering function of the DOLPHIN is concentrated around the triple row slewing bearing. The bearing transfers all the loads, in particular the thrust, to the hull of the ship, while the integrated slewing gear is transferring the steering forces. Watertightness of the ship is safeguarded by the integrated multiple lip seal. The complete unit is connected to the ship by means of a bolt circle on top of the outer diameter of slewing bearing. This allows for an uncomplicated design of the seating in the ship and less time is necessary for the installation procedure. The...

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Podded Propulsion Drive Pod Subsystems Pod Control and Monitoring System The pod’s can be monitored via touch screens located at the Engine Control Room (ECR) as man-machine interface. “Push buttons” at the main page lead to the detailed pages of the different systems, where the data of the system are displayed in a simplified system overview. The page “Values” shows in detail the actual analogue data of the drive in a bar graph view, always both converter systems close together, so a comparisation between the systems is possible very easily. Different pages can be selected to have enough space...

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To support the operation of the pod drives several subsystems are required. The most important subsystems are: n The motor cooling system n The bearing lubrication and monitoring system n The seal support system n The bilge system Further the brake, turning device and shaft blocking system allows a maintenance and repair of rotating parts like the diodes of the exciter. Motor Cooling System The motor is specially adapted to the requirements of the pod underwater housing, it’s diameter is as small as possible with an extreme length of the rotor to get the output power. Therefore the motor requires...

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