Metal Honeycomb Catalyst Integrated Winding Design
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Solution Overview
Problem
Existing catalysts for cleaning exhaust gases using metallic honeycomb bodies are complex in construction and suffer from inadequate thermal insulation, leading to heat loss and reduced efficiency at high temperatures due to the use of multiple parts and a single air gap for insulation.
Innovation Solution
A catalyst design where the honeycomb body, inner casing, outer casing, and insulation region are formed from two tiers of metal foils stacked and wound transversely, eliminating the need for assembly and connection processes, with dissimilar structures and coatings to enhance thermal insulation and reduce heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If multiple parts (honeycomb body, inner casing, outer casing) are used for catalyst construction, then thermal insulation can be achieved through air gaps, but device complexity increases and manufacturing becomes more complex
Solution Approach 1:
The patent combines the honeycomb body, inner casing, outer casing, and insulation region into a single integrated component formed by winding two metal foils. This merging eliminates the need for separate assembly of multiple parts while maintaining the thermal insulation function through the integrated insulation region between the inner and outer casings.
Solution Approach 2:
The two metal foils serve multiple functions simultaneously: one foil forms the honeycomb body with flow ducts, while the other foil forms both the inner casing and outer casing with integrated insulation. This multi-functionality reduces the number of separate components needed while achieving thermal insulation.
2Device complexity
If a single air gap is used for thermal insulation between inner and outer casings, then device complexity is reduced, but thermal insulation effect becomes insufficient at high temperatures
Solution Approach 1:
The insulation region is formed as a composite structure between the two metal foils, creating multiple layers including the air gap and the foil structures themselves. This composite construction enhances thermal insulation effectiveness compared to a simple single air gap, while maintaining relative structural simplicity.
3Adaptability or versatility
If multiple separate components are assembled and connected, then manufacturing flexibility is improved, but production time and assembly complexity increase
Solution Approach 1:
The catalyst components are merged into a single integrated structure formed by winding two metal foils in one continuous process. This eliminates separate assembly and connection steps, significantly improving production efficiency while the winding process itself allows for flexible adaptation to different catalyst configurations.
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 integrated design provides improved thermal insulation, reduces heat loss, and enhances the efficiency of the catalyst by maintaining high temperatures within the honeycomb body, resulting in a simpler and more effective exhaust gas cleaning process.
Implementation Method 1
an insulation region which is disposed between the inner casing and the outer casing
Data Source
AI summary
A catalyst for cleaning exhaust gases, having a honeycomb body which configures a plurality of flow ducts through which a gas from a gas inlet side may flow in the axial direction to a gas outlet side, having an inner casing which encloses the honeycomb body having an outer casing which encloses the inner casing, and having an insulation region which is disposed between the inner casing and the outer casing. The honeycomb body, the inner casing, the outer casing and the insulation region are formed from exactly two tiers formed from metal foils that are stacked on top of one another and wound along a winding direction transverse to the axial direction.