Variable-Radius Flywheel Assembly for RPM and Inertia Control
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Solution Overview
Problem
Current flywheel designs cannot vary their radius or weight distribution to maintain optimal revolutions per minute (RPM), limiting their efficiency in storing and releasing rotational energy.
Innovation Solution
A flywheel assembly with a cylinder, pistons, biasing elements, and pivotably connected arms and masses, allowing for radial displacement of masses and adjustment of the flywheel's radius and mass distribution through electronic clutch collars and valves, enabling remote control of the moment of inertia.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the flywheel uses a fixed radius and fixed weight distribution, then the structure is simple and reliable, but the RPM cannot be optimized for varying energy storage requirements
Solution Approach 1:
The flywheel structure is transformed from static to dynamic by enabling the masses to move radially along the arms. The arms can pivot relative to the central axis, allowing the mass distribution to change dynamically based on operational requirements, thus optimizing RPM for different energy storage needs while maintaining a relatively simple overall structure.
Solution Approach 2:
The flywheel is divided into separate modular components: a central hub, multiple arms, and detachable masses. This segmentation allows independent adjustment of mass positions along the arms, enabling flexible reconfiguration of the moment of inertia without requiring complete structural redesign, thereby resolving the contradiction between adaptability and complexity.
2Productivity
If the flywheel allows variation of radius and mass distribution, then optimal RPM control is achieved, but the device complexity increases with additional components
Solution Approach 1:
The arms serve multiple functions: they provide structural support, act as pivot points for mass adjustment, and function as levers for radial mass displacement. The biasing elements simultaneously provide restoring force and control the return mechanism. This multi-functionality reduces the need for separate dedicated components, thereby improving energy storage efficiency while limiting the increase in overall device complexity.
Solution Approach 2:
The biasing elements (springs) are configured to automatically return the masses to their initial positions after radial displacement, providing self-service functionality. This automatic reset mechanism eliminates the need for additional actuators or complex control systems to reset the mass positions, thereby enhancing productivity through optimal RPM control without proportionally increasing device complexity.
3Quantity of substance
If masses are displaced radially outward to increase moment of inertia, then energy storage capacity increases, but the structural stress and required strength increase
Solution Approach 1:
The flywheel operates with dynamic mass positioning rather than fixed maximum radius. Masses are displaced radially outward only when increased energy storage is required, and can be repositioned inward when less storage is needed. This dynamic adjustment allows the structure to experience variable rather than constant maximum stress, enabling better utilization of material strength and reducing the overall strength requirements compared to a design that must always support maximum radial displacement.
Solution Approach 2:
The segmentation of masses into discrete units that can be independently positioned allows for graduated increases in moment of inertia. Rather than requiring the entire structure to support the full moment of inertia at all times, the segmented masses can be distributed incrementally, allowing the structure to be optimized for the actual operating conditions, thereby reducing unnecessary strength requirements while maintaining energy storage capacity when needed.
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
Enables optimal control of RPM by varying the flywheel's radius and mass distribution, enhancing its energy storage and release capabilities, and maintaining efficient rotational energy transfer.
Implementation Method 1
a first biasing element operatively arranged in the cylinder to bias the first piston in a first axial direction
Implementation Method 2
the first biasing element is gas, the gas being pressurized within the cylinder by the first piston
Implementation Method 3
A flywheel is a mechanical device specifically designed to use the conservation of angular momentum so as to efficiently store rotational energy
Implementation Method 4
a form of kinetic energy proportional to the product of its moment of inertia and the square of its rotational speed
Data Source
AI summary
A flywheel assembly, including a cylinder including a first end and a second end, a first piston non-rotatably connected to the cylinder, the first piston being slidably engaged in the cylinder proximate the first end, a first biasing element operatively arranged in the cylinder to bias the first piston in a first axial direction, a first arm non-rotatably connected to the first piston, a second arm non-rotatably connected to the first piston, a first mass connected to the first arm, and a second mass connected to the second arm.