Filter Element Seal-Groove Alignment for Correct Housing Installation
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Solution Overview
Problem
Existing filter systems face challenges in ensuring that only compatible filter elements can be installed, as they rely on form-fit connections that are not always secure and may allow incorrect elements to be mistakenly inserted, leading to potential leaks or inefficiencies.
Innovation Solution
A filter element design featuring a positioning and sealing section with external positioning recesses and a seal groove that engages with form-fit disturbance geometries in the filter housing, allowing secure axial and radial positioning and sealing, preventing incorrect installation through a guided rotation mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If form-fit connections are used to prevent incorrect filter element installation, then compatibility control is improved, but the complexity of the connection interface increases
Solution Approach 1:
The connection interface is segmented into distinct functional elements: disturbance geometries for circumferential positioning, positioning recesses for engagement, and seal grooves for radial sealing. This segmentation allows each element to perform its specific function independently, improving compatibility control without proportionally increasing overall complexity.
Solution Approach 2:
The filter element features asymmetric positioning recesses and the filter housing has corresponding asymmetric disturbance geometries. This asymmetric design ensures that only correctly oriented filter elements can be installed, providing directional guidance and preventing incorrect installation while maintaining a relatively simple overall structure.
2Reliability
If multiple positioning and sealing features are added to ensure secure installation, then installation security is improved, but the manufacturing complexity increases
Solution Approach 1:
Multiple positioning and sealing features are merged into a single integrated filter element body. The positioning recesses, seal grooves, and disturbance geometries are all formed as part of the same molded structure, allowing simultaneous production of all features in one manufacturing process rather than requiring separate components.
Solution Approach 2:
The filter element design incorporates multi-functional features where the same structural elements serve multiple purposes. For example, the positioning recesses not only provide circumferential positioning but also guide the installation process, while the seal grooves provide both sealing and structural support.
3Ease of operation
If the interface extends farther into the positioning and sealing section than the positioning recesses, then guided rotation during installation is improved, but the depth of the sealing section increases
Solution Approach 1:
The interface is designed to extend beyond the positioning recesses to provide preliminary guidance during the installation process. This extended interface makes contact first and guides the rotational movement before the positioning recesses engage, ensuring correct orientation is achieved before final seating occurs.
Solution Approach 2:
The solution addresses the guidance requirement by adding a radial dimension to the interface design. Rather than increasing axial depth, the interface extends radially beyond the positioning recesses to provide the necessary guidance surface for rotational movement during installation.
Data Source
AI summary
A filter element has a filter medium arranged between first and second end disks. The first end disk has a positioning and sealing section having external positioning recesses for engaging disturbance geometries of a filter housing with form fit to position the filter element circumferentially in the filter housing. The positioning and sealing section has an inner interface for radially sealing and axially positioning the filter element relative to the filter housing. The interface, viewed along a longitudinal direction from first toward second end disk, extends farther into the positioning and sealing section than the positioning recesses. The interface has an annular seal groove surrounding a symmetry axis of the filter element and configured to engage a seal rib of the filter housing with form fit for axial positioning relative to the filter housing. A filter system is provided with such a filter element in its filter housing.