Air Core Reactor Winding Mounting With Hoop-Tension Bending Restraint
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Solution Overview
Problem
Prior air core reactor mounting arrangements are structurally limited by mechanical stresses such as bending, which can occur during operation due to events like short circuits, seismic activity, or extreme temperatures, leading to deformations and reduced reliability.
Innovation Solution
The use of a mounting plate with a ramped surface and filament roving that develops hoop tension to restrain bending of the spider arm, enhancing the bending strength of the mounting arrangement through circumferential support and tension distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional mounting arrangements are used, then the structure is simple, but the bending strength is insufficient under mechanical stresses
Solution Approach 1:
The mounting arrangement combines a rigid mounting plate with flexible filament roving to create a composite structure. The mounting plate provides initial structural support while the filament roving adds tensile strength and flexibility, allowing the assembly to withstand bending stresses from short circuits, seismic activity, or temperature changes without excessive deformation.
Solution Approach 2:
The mounting plate incorporates a ramped surface with a specific oblique angle rather than a flat surface. This geometric parameter change allows the filament roving to be wound at an angle that optimizes hoop tension distribution, transforming the mounting arrangement from a simple support to one that actively resists bending through engineered tension geometry.
2Reliability
If filament roving is wound to provide circumferential support, then the structural integrity improves, but the manufacturing complexity increases
Solution Approach 1:
The filament roving is wound in a curved, circumferential pattern around the mounting plate rather than being attached in straight lines or simple patterns. This curved arrangement naturally distributes stresses more evenly around the perimeter, providing superior structural integrity while the ramped surface guides the winding process to facilitate manufacturing.
Solution Approach 2:
The mounting plate with its pre-formed ramped surface is prepared before the filament roving is wound. This preliminary preparation creates a guided path that simplifies the subsequent filament winding process, ensuring proper tension distribution and geometric alignment without requiring complex real-time adjustments during manufacturing.
3Strength
If the spider arm is made more rigid to resist bending, then the bending strength improves, but the ability to absorb thermal expansion and contraction decreases
Solution Approach 1:
The filament roving acts as a flexible reinforcing element that can accommodate thermal expansion and contraction of the spider arm. While the mounting plate and filament combination provides significant bending strength, the flexible nature of the filament allows the structure to flex slightly with thermal changes without generating excessive stress, maintaining both strength and thermal adaptability.
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
This solution effectively improves the flexural strength of air core reactor mounting systems, providing enhanced structural integrity and reliability against mechanical stresses during operation.
Implementation Method 1
the filament roving that surrounds the ramped surface develops a hoop tension effective to restrain the bending of the spider arm
Data Source
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AI summary
An improved structural arrangement for mounting winding packages in the air core reactor is provided. Disclosed embodiments make use of structural properties, such as hoop tensile properties, of a filament roving (130) that may be arranged to surround structural features (e.g., inclined surfaces (108)) formed in a disclosed mounting plate (110).