Cold Crucible Induction Melter Metal Sector Design
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Solution Overview
Problem
Existing cold crucible induction melters face inefficiencies due to heat generation from induction currents and the risk of electric arcs between metal sectors, which are typically addressed by minimizing sector size and shaping corners, but these solutions do not fully prevent arc generation and optimize operational efficiency.
Innovation Solution
A cold crucible induction melter with metal sectors featuring an inner curved surface convex inward, an outer planar surface, and side planar portions, along with a single cooling passage per sector, which minimizes induced current absorption and prevents electric arcs by effective insulation and cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If metal sectors are used to form the wall of the melter, then electromagnetic field penetrability is ensured, but heat generation from induction current occurs and electric arcs may be generated between sectors
Solution Approach 1:
The wall of the melter is divided into multiple separate metal sectors rather than using a continuous metal wall. This segmentation restricts the path of induction currents, reducing heat generation while maintaining electromagnetic field penetrability. The sectors are arranged adjacently to form the complete cylindrical wall structure.
Solution Approach 2:
Electrical insulators are introduced as intermediary elements between adjacent metal sectors. These insulators prevent direct electrical contact between sectors, thereby preventing electric arc generation while allowing the metal sectors to remain in close proximity for structural integrity and electromagnetic field penetration.
2Loss of energy
If the size of metal sectors is minimized to reduce induced current, then heat generation is reduced, but structural integrity and cooling efficiency may be compromised
Solution Approach 1:
The wall is segmented into multiple sectors with optimized dimensions. Each sector is sized to minimize induced current while maintaining sufficient structural strength. The segmentation allows for smaller individual sector sizes without compromising the overall wall integrity, as the insulators provide electrical isolation while the adjacent arrangement maintains structural continuity.
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 design enhances operational efficiency by preventing electric arcs and reducing heat generation, allowing for a more compact and efficient melter structure with improved cooling efficiency.
Implementation Method 1
A high-frequency induction coil is provided outside the melting chamber to provide power required to melt a substance contained in the melting chamber
Implementation Method 2
each metal sector is cooled by circulation of coolant to maintain the wall of the melter at a predetermined temperature
Implementation Method 3
molten glass which makes contact with the wall of the melter is solidified, thus forming a thin layer
Data Source
AI summary
A cold crucible induction melter includes a wall formed of a plurality of metal sectors insulated by an insulator. Each metal sector includes an inner curved portion which forms an inner surface of the wall and is convex inward relative to the wall, an outer planar portion which forms an outer surface of the wall, and two side planar portions which connect the inner curved portion to the outer planar portion. The metal sector further includes a cooling passage longitudinally formed inside the metal sector, and an insulation layer covering the inner curved portion and the two side planar portions.