Round Filter Element Asymmetric Positioning and Sealing
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Solution Overview
Problem
Existing round filter elements face challenges in secure and reliable installation within filter housings, particularly in preventing accidental rotation and ensuring flow-tight separation between the raw and clean sides during gas filtration processes.
Innovation Solution
A round filter element design featuring a circumferentially extending seal carrier with a sealing element and a positioning element for form-fit connection within the filter housing, along with a support grid to maintain the filter medium body's shape and prevent deformation, ensures secure installation and flow-tight separation between the raw and clean sides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a round filter element is installed in a filter housing, then gas filtration is achieved, but the filter element may accidentally rotate or become misaligned during operation
Solution Approach 1:
The patent employs asymmetric positioning elements including a D-shaped positioning element on the filter element and a corresponding positioning recess in the filter housing, along with cam-shaped positioning elements with asymmetric profiles. These asymmetric features prevent rotational misalignment by ensuring the filter element can only be installed in the correct orientation, thereby maintaining reliable alignment without requiring complex adjustment mechanisms during operation or replacement.
2Reliability
If a sealing element is provided to separate the raw side from the clean side, then flow-tight separation is achieved, but the sealing mechanism becomes more complex
Solution Approach 1:
The patent combines multiple functions into integrated structures: the seal carrier integrates the sealing element, positioning elements, and support functions into a single component. The end disks are merged with sealing and positioning features, and the support grid is integrated with the seal carrier structure. This merging reduces the number of separate components while maintaining reliable flow-tight separation between the raw and clean sides.
Solution Approach 2:
The seal carrier serves multiple functions simultaneously: it provides flow-tight sealing through the sealing element, positional alignment through positioning elements, structural support for the filter medium body, and rotational prevention through asymmetric positioning features. This multi-functionality reduces overall device complexity by eliminating the need for separate components for each function.
3Stability of the object's composition
If the filter medium body is supported by a support grid, then the filter medium body shape is maintained, but the device complexity increases
Solution Approach 1:
The support grid is merged with the seal carrier to form an integrated structure. The support grid is positioned within the seal carrier and works in conjunction with the end disks and positioning elements as a unified support system. This integration maintains the filter medium body shape through distributed support while reducing the number of separate components and simplifying the overall device structure.
Data Source
AI summary
A round filter element has a filter medium body with a wall to be flowed through by a fluid to be purified in a radial direction relative to a longitudinal axis of the filter medium body. A circumferentially extending seal carrier is arranged at or adjacent to an end face of the filter medium body. A sealing element is supported at the seal carrier adjacent to a radial outer side of the filter medium body. A positioning element extends into the filter medium body and engages with a correlated housing-associated counter positioning element of a filter housing when the round filter element is installed in the filter housing. The seal carrier separates flow-tightly a raw side of the round filter element from a clean side of the round filter element when the round filter element is installed in the filter housing.