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Propulsion system

A technology of propulsion system and thruster, which is applied in ship propulsion, propulsion components, and propulsion-based emission reduction, etc., to achieve the effects of improved hydrodynamic efficiency, efficient ship operation, and low power loss

Active Publication Date: 2013-11-20
ABB (SCHWEIZ) AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, total energy consumption and electricity generation must be as efficient as possible

Method used

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Examples

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Embodiment Construction

[0031] figure 1 A schematic diagram of a second embodiment of the invention is shown. The main rotary power unit 2 , such as a two-stroke diesel engine, drives a propulsion alternator 4 , the rotor of which is fastened to one output shaft of the rotary power unit 2 . The main propeller 6 of the ship is fastened to the other output shaft 10 of the rotary power unit 2 . Although in figure 1 In the embodiment shown the alternator 4 and propeller 6 are on opposite sides of the rotating power unit 2 , but the generator could also be on the same side of the rotating power unit 2 as the propeller 6 . A second propeller 12 driven by an AC motor 8 is arranged opposite to the main propeller 6 . The main or forward propellers 6 are fitted to the hull of the vessel with bearings. A second or rear propeller 12 is supported to the hull of the vessel with the AC motor 8 or to the rudder assembly of the vessel. The front propeller 6 and the rear propeller 12 are arranged to operate in a ...

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PUM

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Abstract

An arrangement is disclosed for supplying propulsion power to a contra rotating propellers (CRP) propulsion system in a marine vessel, which arrangement can include a first propeller driven by a rotating power unit, and a second propeller driven by an AC motor. The second propeller can be rotated in an opposite direction relative to the first propeller, wherein an AC generator is driven by the rotating power unit and the AC generator is electrically connected to the AC motor. The rotation speed of the second propeller is between for example 95% and 150% of the rotation speed of the first propeller. The AC motor and the AC generator have the same electrical frequency. The pole number of the AC generator is from for example 2 to 40 and the pole number of the AC motor is from for example 2 to 40.

Description

technical field [0001] The invention relates to an assembly for supplying propulsion power to a contra-rotating propeller (CRP) propulsion system in a sea-going vessel, the assembly comprising a first propeller driven by a rotary power unit and a second propeller driven by an AC motor. Background technique [0002] The propulsion power of large warships or seagoing ships is generated by rotating power units, and the energy sources of rotating power units are oil, natural gas, and nuclear energy. A rotating power unit may be a diesel engine, a gas turbine, or a turbine rotating a nuclear power reactor. The mechanical output shaft is coupled directly or via gears to the shaft of the propeller or rotary power unit that drives a generator that supplies electrical power to the propeller motor of the vessel. Furthermore, several different combinations of these two main ways of driving propellers have been used. [0003] The power and energy efficiency of seagoing vessels require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63H5/08B63H21/17
CPCB63H21/17B63H5/08F04B17/03B60L2200/32B63H2021/205B63J3/02B63H5/10B63H2005/1258Y02T70/5236
Inventor K.科基拉M.卡雅瓦S.卡纳瓦
Owner ABB (SCHWEIZ) AG