Diverter Switch Reinforcement via Composite Embedding
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Solution Overview
Problem
Diverter switches in power transformers are fragile, with flanges prone to breaking and shafts susceptible to cracking during installation, leading to costly replacements due to insufficient rigidity provided by current hardeners like epoxy resin.
Innovation Solution
Embedding a reinforcing material such as fiberglass within the flange and wrapping the shaft with the same material, using filament winding to enhance rigidity, reduces the likelihood of breakage and cracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If diverter switches are formed with hardener such as epoxy resin, then the diverter switch can be manufactured, but the hardener does not provide sufficient rigidity to reinforce the shafts and flanges
Solution Approach 1:
The patent applies composite materials by embedding fiberglass reinforcing material within the epoxy resin hardener to form a composite structure. This composite material provides both the binding properties of the resin and the structural rigidity of the fiberglass, resolving the contradiction between manufacturability and insufficient rigidity.
Solution Approach 2:
The fiberglass reinforcing material is nested within the epoxy resin matrix, creating a layered composite structure where the fiberglass provides structural reinforcement while the resin binds the fibers together. This nesting approach enables the shafts and flanges to achieve sufficient rigidity while maintaining manufacturability.
2Strength
If flanges are made with standard materials, then manufacturing is simple, but flanges break easily during installation due to excess pressure
Solution Approach 1:
The flanges are constructed using composite materials with fiberglass embedded in epoxy resin, providing enhanced break resistance during installation while maintaining a manufacturing process that integrates the reinforcement during the molding stage, thus not significantly increasing manufacturing complexity.
Solution Approach 2:
The reinforcing material is specifically embedded in critical areas of the flange structure where stress concentration occurs during installation. This local reinforcement approach provides targeted break resistance without requiring complete restructuring of the entire flange, balancing strength improvement with manufacturing simplicity.
3Strength
If shafts are made with standard hardener, then manufacturing is straightforward, but shafts are susceptible to cracking during lead installation
Solution Approach 1:
The shafts are reinforced by embedding fiberglass material within the epoxy resin structure, creating a composite shaft that resists cracking during lead installation. The composite structure maintains the basic shaft geometry and manufacturing process while significantly improving crack resistance.
Solution Approach 2:
The fiberglass reinforcement is nested within the shaft's epoxy resin matrix, providing internal structural support that prevents cracking during installation. This nested reinforcement approach maintains the shaft's external dimensions and mounting characteristics while dramatically improving its mechanical strength.
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 reinforcement significantly reduces the risk of breakage and cracking, minimizing replacement costs, time, and resource expenditure by providing enhanced structural integrity to diverter switch components.
Implementation Method 1
a flange (12) embedded with a reinforcing material (16)
Implementation Method 2
A reinforcing material is filament wound over the portion of the epoxy resin machined
Data Source
AI summary
A reinforced diverter switch is molded with a flange having a reinforcing material embedded therein. A shaft of a diverter switch is wrapped with a reinforcing material. The shaft of the diverter switch may be wrapped by first removing a portion of the epoxy resin to expose a conductor of the diverter switch, machining a portion of the epoxy resin, and then filament winding the reinforcing material over the portion of the epoxy resin machined.