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MULTI-SCREW SHIP PROPULSION (Electric)

[Category : - MECHANICAL ENGINEERING]
[Viewed 83 times]

A classic solution for the propulsion of small and large ships includes a propulsion unit (most commonly a diesel engine) that directly or indirectly, via the engine shaft (e.g., using an electric generator powered by an electric motor), rotates the shaft extending through the stern section of the ship with a propeller.

With this invention, propulsion is achieved using multiple (at least four) drive units (electric motors with propellers) positioned at the bow and stern of the ship, which can rotate 360° around their vertical axis. This provides excellent maneuverability (e.g., allowing the ship to rotate around its center), and in rough sea conditions, at least two propellers will always remain submerged. As a result, the vessel never loses propulsion or control at any moment.

MULTI-SCREW SHIP PROPULSION provides better maneuverability than conventional propeller-driven systems, especially in confined or congested waters. In cases where the vessel is pitching due to extreme weather conditions with large waves, at least two propellers remain operational at all times, ensuring continuous control.
It consists of multiple (at least four) propulsion units (PJ) as shown in Figure 2, each containing a sealed electric motor with a propeller mounted on the same shaft. The motor is powered through a vertical tube (C), which is supported and sealed within the vessel's hull and extends above the waterline at maximum draft. This design allows the propulsion unit to rotate freely in any position within 360° around its vertical axis.

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crobac (United States)

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