Round Filter Bellows Assembly for Low-Stress Gas Filtration
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Solution Overview
Problem
Existing circular filter elements for fuel cell applications are complex to manufacture and do not achieve optimal filtration performance.
Innovation Solution
A circular filter element with concentrically arranged particle and pollutant filter medium bodies, designed as bellows with a common end plate and gas-permeable support element, allowing radial flow and reducing friction through gas-permeable media layers, facilitating easy assembly and high filtration efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a flat filter element is used, then the housing can be simply designed, but the filter element is subject to high mechanical stress and requires a large frame area for the same filtration area
Solution Approach 1:
The filter element is designed with a rounded cross-section instead of a flat shape. This curvature distributes mechanical stress more evenly across the filter element surface, reducing peak stress concentrations and improving structural strength without requiring a more complex housing design
2Device complexity
If a flat filter element is used, then the housing can be simply designed, but a larger frame area is required for the same filtration area
Solution Approach 1:
The rounded cross-section of the filter element allows for a more compact arrangement within the housing, increasing the effective filtration area within the same frame area compared to flat filter elements
3Strength
If a rounded filter element is used, then the mechanical stress is reduced and frame area is optimized, but the filter element cannot be easily removed from the housing
Solution Approach 1:
The filter element is divided into a frame portion and a filter medium portion that can be separated. The frame portion with the rounded cross-section remains in the housing providing structural strength, while the filter medium can be easily removed and replaced by detaching it from the frame, combining the benefits of rounded design with ease of maintenance
4Reliability
If the filter element is tightly fitted in the housing, then filtration efficiency is improved, but cleaning and disassembly become difficult
Solution Approach 1:
By separating the filter element into removable frame and filter medium components, the filter medium can be easily detached for cleaning or replacement without requiring disassembly of the entire housing or tight fitting mechanisms, maintaining filtration efficiency while enabling easy maintenance
Data Source
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AI summary
The invention relates to a round filter element for filtering a gaseous fluid, comprising a particle filter medium body designed as a hollow body and a separate pollutant gas filter medium body designed as a hollow body, wherein the filter medium bodies are concentrically arranged to one another and enclose an internal flow chamber. The end faces of both filter medium bodies are covered by a common end disk in a flow-tight manner. Both filter medium bodies are designed as a filter bellows from folded filter medium.