Non-return Membrane Adhesion Disruption for Filter Reliability
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Solution Overview
Problem
Existing filter elements for fluid filtration in internal combustion engines face challenges in maintaining the reliability and reducing wear of non-return membranes, particularly in their response behavior during transitions between open and closed states.
Innovation Solution
Incorporating relief-like adhesion disruption areas on the contact section of the end body, such as channel-like depressions, to prevent adhesion and ensure even deformation of the non-return membrane, which reduces wear and improves response behavior by allowing fluid flow to lift and elastically bend the membrane, ensuring proper sealing and preventing backflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the non-return membrane rests flat against a smooth surface of the contact section, then sealing effectiveness is improved, but adhesion and sticking occur reducing response behavior
Solution Approach 1:
The contact section is designed with non-uniform surface properties: most areas are smooth for sealing, while specific local areas have relief-like adhesion disruption structures. This allows the membrane to seal effectively on smooth areas while preventing sticking at the relief structures, resolving the contradiction between sealing effectiveness and response behavior.
2Ease of operation
If the non-return membrane is allowed to deform during opening and closing, then response behavior is improved, but wear increases
Solution Approach 1:
The relief-like adhesion disruption areas are strategically positioned to allow controlled local deformation during operation while limiting overall membrane deformation. This enables the membrane to respond quickly to flow changes while the structured support reduces excessive deformation that would cause wear, extending service life.
3Ease of operation
If protrusions are added to the end cap to prevent sticking, then response behavior is improved, but device complexity increases
Solution Approach 1:
Instead of adding protrusions throughout the end cap, relief-like adhesion disruption structures are created only in specific local areas of the contact section. This can be achieved through simple manufacturing methods like molding or machining recesses, maintaining structural simplicity while preventing sticking at critical locations.
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 enhances the reliability and reduces wear of the non-return membrane by preventing sticking and fluttering, ensuring effective fluid flow management and automatic closure of the fluid opening, thereby maintaining efficient filtration and minimizing mechanical stress.
Implementation Method 1
the surface of the non-return membrane facing the rear side of the contact section has at least one relief-like adhesion interference area for preventing adhesion of the non-return membrane to the contact section of the at least one end body
Implementation Method 2
Fluid flow through the fluid port toward the anti-return membrane may lift the anti-return membrane from the at least one fluid port
Implementation Method 3
Upon a cessation of fluid flow or a reversal of fluid flow, the mechanical stress causes the non-return membrane to automatically return to the quiescent state and close the at least one fluid opening
Implementation Method 4
A filter element for use in an openable filter housing... which can be arranged in a filter housing of the filter device for filtering a fluid
Data Source
AI summary
The filter element (32) has an annular closed filter medium (34) which is provided with end portions (36,38). An annular return check diaphragm (44) for opening/closing fluid port (26), is arranged on the filter medium by facing away from the end portion (38). The diaphragm is in a maximum opening state when diaphragm back surface (56) is positioned by facing the bearing portion (60) at the end portion (38). The diaphragm back surface is provided with a relief-like detention fault area to disrupt an adhesion of the return check diaphragm on the bearing portion. An independent claim is included for filter.