Honeycomb Body Support Pin Spacing for Stability
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Solution Overview
Problem
Honeycomb bodies with larger cross sections and thinner walls in exhaust gas cleaning systems face challenges with structural stability, weight, and cost due to increased thermal and dynamic stresses, and the use of more support pins can damage channels and increase production costs.
Innovation Solution
A honeycomb body arrangement with a twisted or wound stack and support pins spaced at least 25 mm apart, allowing for high structural stability and efficient exhaust gas cleaning, along with a method and device for inserting support pins to avoid channel damage, using a holding device for transverse excitation to position pins without damaging the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If more support pins are used to stabilize thin channel walls, then structural stability is improved, but the number of channels is reduced and damage probability increases
Solution Approach 1:
The patent applies local quality by providing support pins selectively at specific locations where structural stability is most needed, rather than uniformly distributing them throughout the honeycomb body. This localized approach stabilizes thin channel walls at critical positions while preserving channels in other areas, thus reducing overall channel count impact and damage probability.
2Stability of the object's composition
If more support pins are used to stabilize thin channel walls, then structural stability is improved, but manufacturing cost and weight increase
Solution Approach 1:
By localizing support pins to specific critical positions rather than using maximum numbers throughout, the patent reduces material consumption and manufacturing complexity. This selective placement achieves necessary structural stability while minimizing production costs and weight.
Solution Approach 2:
The patent applies partial action by using a limited, optimized number of support pins rather than maximum possible pins. This partial approach provides sufficient structural stability for thin-walled honeycomb bodies while avoiding the excessive costs and weight associated with maximum support pin deployment.
3Strength
If support pins are inserted to connect honeycomb bodies, then connection strength is improved, but channel damage during assembly increases
Solution Approach 1:
The patent applies preliminary action by pre-positioning support pins in holding devices before assembly. This allows for controlled, gentle insertion of support pins into predetermined positions, reducing the risk of channel damage during assembly while ensuring proper connection strength between honeycomb bodies.
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 solution provides high structural stability and cost-effectiveness for large-diameter honeycomb bodies with reduced support pins, enhancing exhaust gas cleaning efficiency and extending the life expectancy of the honeycomb body while minimizing production complexity and costs.
Implementation Method 1
the holding device is excitable in such a way that the holding device is essentially transverse to the direction in which the channels or slots of the first honeycomb body extend or to a central axis of the support pins is movable
Data Source
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AI summary
The present invention relates to an arrangement comprising a first honeycomb body, which is formed by at least one convoluted or wound stack and has a plurality of channels allowing flow, wherein a first end of the stack is connected to an electric connection and a second end is connected to an electric ground. The stack comprises a plurality of sheet metal foils in electric contact with each other, the foils being structured at least in some regions. At the same time, the honeycomb body has support pins for connecting to a second honeycomb body, the pins have a distance of at least 25 mm from each other along the course of the stack at least outside an inner region. The invention further relates to a method for introducing support pins in a honeycomb body and to a device for receiving a honeycomb body and/or for positioning support pins, wherein the device enables the installation of the support pins in the honeycomb body.