Dynamic Roll Stabilizer Using Pneumatic Bellows
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Solution Overview
Problem
Small passenger boats experience dynamic instability during loading and unloading, posing safety hazards due to varying step heights and clearance gaps between the boat and dock, which existing stabilization systems fail to adequately address.
Innovation Solution
A dynamic roll/pitch stabilizer system using pairs of air bellows or air bags that apply a constant pressure to limit the boat's roll and pitch, providing compliant contact surfaces that conform to the boat's hull shape without supporting static loads, allowing for quick and reliable stabilization without precise alignment requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the boat is tied up to the dock during loading and unloading, then passenger safety is improved, but the boat still experiences dynamic movement causing varying gap and height
Solution Approach 1:
The patent applies dynamics by using inflatable bellows that can dynamically adjust their volume and pressure in response to boat movement. The bellows are filled with air or gas and inflated/deflated as needed to maintain constant pressure against the boat hull, providing adaptive stabilization during loading and unloading operations.
Solution Approach 2:
The patent changes the physical state of the bellows from deflated to inflated, altering their volume and pressure characteristics. This parameter change allows the bellows to transition between a retracted state during normal operation and an extended stabilizing state during loading/unloading, providing the necessary force to reduce boat movement.
2Reliability
If a stabilizing system is deployed to reduce boat movement, then passenger safety is improved, but the system complexity increases
Solution Approach 1:
The patent uses pneumatic principles by employing inflatable bellows filled with air or gas. The bellows utilize gas pressure to generate the stabilizing force needed to reduce boat movement. The pneumatic system allows for a relatively simple mechanical structure compared to hydraulic or mechanical counterweight systems, reducing overall device complexity while maintaining effectiveness.
Solution Approach 2:
The bellows system is designed to be self-regulating to some extent, where the inflation/deflation process responds to the dynamic conditions during loading and unloading. The system automatically adjusts its pressure and volume in response to boat movement, reducing the need for complex external control mechanisms.
3Stability of the object's composition
If traditional mechanical stabilization systems are used, then boat stability is improved, but maintenance costs increase due to underwater mechanisms
Solution Approach 1:
The patent replaces complex mechanical underwater stabilization mechanisms with a pneumatic system using inflatable bellows. The bellows can be inflated and deflated using pneumatic pressure, eliminating the need for complex mechanical linkages, gears, or hydraulic pumps underwater. This reduces maintenance requirements as there are fewer mechanical parts submerged in water that could fail or require repair.
Solution Approach 2:
The bellows are constructed from flexible materials that can expand and contract, providing a simple yet effective stabilization mechanism. The flexible nature of the bellows allows them to accommodate boat movement without requiring rigid mechanical structures, reducing wear and tear on underwater components and lowering maintenance costs.
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 effectively reduces the risk of passenger injury by stabilizing the boat during loading and unloading, minimizing stress on the hull, and reducing maintenance costs through fewer underwater mechanisms, while allowing for rapid deployment and release.
Implementation Method 1
The internal pressure of the bellows is controlled by an out-of-water pressurization assembly so as to apply a stabilizing force (or restoring force) to limit roll or pitch of the boat during unloading and loading.
Data Source
AI summary
A small boat dynamic roll stabilizer. The stabilizer includes two or more pairs of spaced-apart flexible bellows or air bags to receive and support a boat hull during passenger loading and unloading. Dynamic pitch is limited or even stopped for the boat hull by maintaining each of the bellows, which each has a contact surface contacting a portion of the hull from below (within the water), at an internal pressure great enough to support dynamic loading of the boat hull while allowing the water to support the hull's static load. A pressure chamber is provided that has its interior volume linked via ducting or piping with the bellows, and a controller uses a feedback loop to operate an actuator to move a piston within the pressure chamber to maintain the pressure of the chamber and linked bellows as the loading of the boat hull dynamically varies during loading and unloading.