Ship Propulsion Transmission Device With C-Shaped Support Arm
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Solution Overview
Problem
Existing propulsion systems for ships face challenges in navigating shallow waters and avoiding obstacles, as they often require complex mechanisms for lifting the propeller and rudder, which can be cumbersome and prone to lateral displacement, affecting stability and resistance.
Innovation Solution
A transmission device with a C-shape support arm and orthogonal hinged plates that allows for adjustable inclination of the cavitation plate, a hinge mechanism for easy propeller and rudder lifting, and a C-shape support piece protecting the propeller and rudder from obstacles, enabling vertical movement within a ship channel to prevent swinging and stabilize the rudder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cylinder is used to lift the propeller in shallow waters, then the propeller can be raised, but the device becomes complex and the propeller is difficult to access for maintenance
Solution Approach 1:
The support structure is divided into a C-shaped support arm with separate hinged plates that can independently control the propeller position. The hinged plates are segmented to allow precise positioning and easy access to the propeller without requiring complex cylindrical mechanisms.
Solution Approach 2:
The hinged plates are designed to be movable rather than fixed, allowing the propeller to be dynamically positioned between operational and maintenance states. The hinges enable smooth transitions between positions while maintaining structural integrity.
2Productivity
If the propeller is placed below the keel for normal operation, then propulsion efficiency is improved, but the propeller is vulnerable to obstacles and requires complex lifting mechanisms
Solution Approach 1:
The C-shaped support arm with hinged plates provides a dynamic positioning system that allows the propeller to be easily moved between submerged (for efficiency) and raised (for obstacle avoidance) positions. This dynamic capability eliminates the need for complex lifting mechanisms while maintaining both operational efficiency and obstacle protection.
Solution Approach 2:
The vertical position parameter of the propeller is made variable through the hinged plate mechanism. The propeller can be positioned at different vertical levels (submerged or raised) depending on operational requirements, allowing optimization of both propulsion efficiency and obstacle avoidance.
3Device complexity
If the hinge allows lateral displacement of the axis, then the mechanism is simpler, but the stability and resistance of the device is reduced
Solution Approach 1:
The hinge mechanism uses asymmetric hinged plates with specific geometric configurations that inherently prevent lateral displacement. The orthogonal arrangement of the hinged plates creates structural asymmetry that provides both simplicity and stability, eliminating the need for additional complex stabilizing components.
4Device complexity
If the cavitation plate position is fixed, then the structure is simpler, but it cannot be optimized for different ship configurations
Solution Approach 1:
The C-shaped support arm is segmented into adjustable sections with hinged connections, allowing the cavitation plate position to be independently optimized for different ship configurations. This segmentation maintains relative structural simplicity while providing the necessary positioning flexibility.
Solution Approach 2:
The cavitation plate mounting system incorporates dynamic adjustment capabilities through the hinged plates, enabling the plate to be positioned at optimal locations for different operational requirements and ship types without requiring a completely different structure for each application.
Data Source
Figure 1
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Figure 5
AI summary
Transmission device for ships, comprising a drive axle (3) of a pusher propeller (4), which is included in a C-configuration support arm (5) the vertical plot of which is situated towards the stern of the ship, while its wings are closed by the rotation axis (7) of the rudder (6), riding above saying stick a plate of cavitation (9)above which it articulates a hinge (8) being actuated by a cylinder (11) that carries out the extension and compression stroke of the same, lowering or raising the axis-propeller, rudder and cavitation plate assembly under the keel of the ship in normal operating situation, or raising it when the ship moves through shallow waters or with seaweeds, rocks or other types of shallow obstacles.