Pivoting Scoop Rudders for Rapid Ship Deceleration
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Solution Overview
Problem
Conventional rudder systems for ships experience significant energy losses due to turbulence caused by abrupt deflection of water flow, and require a reversing gear for fast deceleration, which adds complexity and time to the braking process.
Innovation Solution
A rudder system with two pivotable flaps arranged in a scoop shape to gradually deflect and reverse the water flow, eliminating the need for a reversing gear and reducing turbulence, allowing for rapid deceleration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a reversing gear is used to achieve fast deceleration, then braking time is reduced, but device complexity increases
Solution Approach 1:
The invention extracts and eliminates the reversing gear from the driving system by using the rudder system alone to achieve both steering and deceleration functions. The rudder flaps are configured to deflect water flow in a manner that creates drag force for deceleration without requiring any reversing mechanism, thereby simplifying the overall system.
Solution Approach 2:
The rudder system is designed to perform multiple functions: it serves as both the steering mechanism and the deceleration device. By configuring the flaps to deflect water flow appropriately, the same rudder structure that steers the ship also provides rapid deceleration when needed, eliminating the need for separate reversing gear.
2Force
If conventional rudder systems deflect water flow abruptly, then deceleration force is increased, but energy losses due to turbulence increase
Solution Approach 1:
The invention uses curved surfaces instead of flat or angular ones. The outer side of each flap comprises a curvature configured to bend the water flow smoothly. This curved geometry allows the water flow to be deflected gradually along a smooth path, reducing turbulence and energy losses while still generating sufficient deceleration force.
Solution Approach 2:
The flaps are designed to be pivotable, allowing dynamic adjustment of the deflection angle. During deceleration, the flaps can be rotated to optimize the water flow deflection, creating a dynamic system that adapts to different operating conditions while maintaining efficient flow patterns and minimizing turbulence.
3Loss of time
If two rudders are arranged on opposite sides to enable rapid deceleration, then braking performance is improved, but device complexity increases
Solution Approach 1:
The invention merges the steering and deceleration functions into a single integrated rudder system. The two flaps arranged on opposite sides work together as one coordinated unit, where both flaps can be deflected simultaneously to create drag for deceleration, or deflected asymmetrically for steering, eliminating the need for separate systems.
Solution Approach 2:
The rudder system is segmented into two independent but coordinated flaps, each capable of independent deflection. This segmentation allows flexible control configurations: both flaps can be deflected equally for maximum deceleration, or asymmetrically for steering, providing rapid braking capability while maintaining system simplicity through modular design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves efficient and rapid deceleration without energy loss, enhancing safety and maneuverability by smoothly deflecting water flow, thus eliminating the need for a reversing gear and reducing braking time.
Implementation Method 1
two flaps (9, 10) that are pivotable relative to each other between a forward sailing state and a reversing state. In the reversing state, said flaps (9, 10) are oriented to define a scoop shape of the rudder (7) to deflect and reverse the water flow (8)
Data Source
Figure 1
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Figure 4~5
AI summary
The present invention relates to a ship, comprising: - a propeller that is driveably connected to a drive; - a rudder system arranged downstream of the propeller and comprising a pair of rudders arranged on opposite sides relative to a water flow induced by the propeller and configured to jointly deflect the water flow induced by the propeller; - wherein each rudder of the pair of rudders comprises two flaps that are pivotable relative to each other between a forward sailing state and a reversing state; and - wherein, in the reversing state, said flaps are oriented to define a scoop shape of the rudders to deflect and reverse the water flow.