Polygonal Linear Generator Layout With Shared Reaction Volume
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Solution Overview
Problem
Existing linear electromagnetic generator systems face challenges in maximizing power density and reducing component complexity while minimizing vibrations and side loads during operation.
Innovation Solution
A polygonal generator system is designed with a shared reaction volume between adjacent linear electromagnetic machines (LEMs) and power cylinders, utilizing a polygonal shape with an even number of sides, which eliminates the need for air springs and optimizes uniflow scavenging through strategically positioned intake and exhaust ports, supported by a frame with stabilizing features to minimize vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional linear electromagnetic generator system is used, then the system structure is simple, but the power density is low and component complexity increases
Solution Approach 1:
Adjacent power cylinders are merged to share a common reaction volume, eliminating the need for separate reaction volumes for each cylinder. This sharing arrangement increases power density while reducing the total number of components required in the system.
Solution Approach 2:
The shared reaction volume serves multiple adjacent power cylinders simultaneously, making it a multi-functional component. This universal reaction volume structure allows the same space to be utilized by multiple cylinders, thereby increasing power density without proportionally increasing component complexity.
2Reliability
If air springs are used for translator rebound, then the rebound function is achieved, but the component complexity and vibration increase
Solution Approach 1:
The air spring component is completely removed from the system. Instead of using air springs for translator rebound, the system utilizes the shared reaction volume and pressurized region to provide the necessary rebound force, thereby eliminating a complex component while maintaining the rebound function.
Solution Approach 2:
The system uses its own internal pressurized region in the shared reaction volume to provide the rebound force for translators, rather than relying on external air spring components. This self-service mechanism reduces component complexity while achieving the same functional outcome.
3Ease of operation
If power cylinders are arranged in a non-polygonal configuration, then the layout is flexible, but vibrations and side loads increase
Solution Approach 1:
The system employs a specific polygonal configuration (such as hexagonal arrangement) where the angular relationships between adjacent power cylinders are precisely defined. This asymmetric angular arrangement optimizes the distribution of forces, minimizing vibrations and side loads while maintaining layout efficiency.
4Productivity
If intake and exhaust ports are not strategically positioned, then the design is simpler, but scavenging efficiency decreases
Solution Approach 1:
The intake and exhaust ports are positioned at specific locations within the shared reaction volume, optimized for uniflow scavenging. This localized strategic positioning ensures efficient gas flow and scavenging performance, maximizing productivity while the overall design remains integrated and relatively simple.
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 enhances power density, reduces component complexity, and minimizes vibrations and side loads, achieving efficient energy conversion with optimized scavenging and structural stability.
Implementation Method 1
Each generator described herein includes a LEM for converting kinetic energy of translators to electrical power based on movement of the translators relative to stationary stators
Implementation Method 2
Fuel and air provided to the intake port for reacting in the reaction volume propagates from the intake port to the exhaust port
Data Source
AI summary
Generators are presented herein for generating power outputs using a plurality of linear electromagnetic machines (“LEMs”) affixed to a frame such that adjacent LEMs interact with a single power cylinder. The power cylinder includes a reaction volume, a first bore coaxial with a first axis, and a second bore coaxial with a second axis, different from the first axis, wherein the first axis and the second axis intersect in the reaction volume. The frame includes a plurality of members arranged in a polygon and a plurality of intermediate structures each comprising respective rigid extension, wherein each respective rigid extension is fixedly attached to respective axial ends of adjacent members of the plurality of members. Adjacent LEMs of a plurality of LEMs are coupled at each respective axial end of each respective LEM to the power cylinder using an intermediate structure of the plurality of intermediate structures.