High Gradient Insulator Stacked Layer Construction
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Solution Overview
Problem
Conventional high-voltage, high-gradient insulators (HGIs) have low tensile strength, limiting their applicability to compressive loading only and restricting their use in various high-voltage devices due to size constraints.
Innovation Solution
A technique involving the stacking of alternating layers of conductors and insulators, followed by vacuum pressure potting onto an insulating rod and post-machining to form a high-tensile strength HGI assembly, which includes methods such as cutting multilayer circuit boards into cylinders and using soldering jigs with axial compression and heat treatment to achieve enhanced tensile strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional HGIs are used to achieve compact size and high electrical-breakdown strength, then the insulator size is reduced and electrical performance is improved, but the tensile strength becomes low limiting application to compressive loading only
Solution Approach 1:
The patent employs composite materials by combining metal layers (conductive) with insulator layers (dielectric) in alternating sequences to form HGI structures. This composite approach enables simultaneous achievement of high electrical-breakdown strength from the insulator layers and high tensile strength from the metal layers, resolving the contradiction between electrical performance and mechanical tensile strength. The composite structure allows the material to withstand both compressive and tensile loads effectively.
Solution Approach 2:
The patent segments the HGI structure into multiple thin alternating layers of conductors and insulators rather than using a single monolithic material. This segmentation into fine layers (e.g., 0.002-0.005 inches thick) creates a distributed structure where stress is shared across multiple interfaces, enhancing overall tensile strength while maintaining the electrical insulation properties and compact size of conventional HGIs.
2Strength
If conventional HGI construction methods are used, then the manufacturing process is simple, but the tensile strength remains low
Solution Approach 1:
The patent applies preliminary action by pre-forming metal and insulator layers into cylindrical shapes before assembly. The metal cylinders are prepared with precise dimensions and the insulator cylinders are pre-cut to fit between them. This preliminary preparation of components simplifies the final assembly process while ensuring high tensile strength through precise dimensional control and proper material selection.
Solution Approach 2:
The patent transitions from planar layered structures to three-dimensional cylindrical geometries. By forming alternating metal and insulator layers into cylinders and assembling them concentrically, the structure gains enhanced mechanical strength in all directions while maintaining rotational symmetry. This dimensional transformation from 2D layers to 3D cylindrical assembly improves tensile strength without significantly increasing manufacturing complexity.
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 approach results in HGIs with tensile strengths of 750 to 1500 pounds per square inch, offering improved mechanical and electrical properties, enabling broader applications in high-voltage devices like x-ray generators and particle accelerators.
Implementation Method 1
stacking alternating layers of conductors and insulators and vacuum pressure potting the alternated stacked layers onto an insulating rod
Implementation Method 2
stacking the cylinders within a soldering jig to make a rod
Implementation Method 3
placing the jig into an oven set at a predefined temperature for a predefined period of time
Implementation Method 4
placing a weight or applying an axial compression clamping force to the stack
Data Source
AI summary
A process for constructing a high-tensile strength, high-gradient insulator (HGI) may include stacking alternating layers of conductors and insulators, and vacuum pressure potting the stacked layers onto an insulating rod. The process may also include post machining the stacked layers to form a complete assembly of the HGI.