Multiple Bead Air Filter Seal for Uneven Housing Compression
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Solution Overview
Problem
Current air filter joint designs are limited in their ability to completely seal against the housing surface, leading to unfiltered fluid leakage due to voids in the sealing surface and uneven compressive forces, which can cause damage to the system.
Innovation Solution
The use of multiple compression seal features, specifically two sealing beads of unequal heights, incorporated into the filter gasket to interact and compensate for voids and uneven compressive forces, creating a robust seal surface that prevents air and dust leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single compression seal is used, then the device complexity is reduced, but the sealing reliability deteriorates due to voids and uneven compressive forces
Solution Approach 1:
The single seal is segmented into multiple sealing beads (typically three) arranged in series along the sealing path. Each bead independently contacts the housing surface, creating multiple sealing zones that collectively prevent leakage even if individual beads have voids or experience uneven compression.
Solution Approach 2:
Each sealing bead is designed with specific local properties including varying durometer hardness values (softer beads for better conformability, harder beads for structural support) and different geometric profiles. This local differentiation allows each bead to optimize its sealing performance in specific regions of the seal path.
2Reliability
If identical redundant seals are used, then the probability of complete seal surface increases, but leakage still occurs when both seals have voids or are unevenly compressed
Solution Approach 1:
The sealing beads are designed with asymmetric properties including different heights, varying durometer hardness values, and different geometric profiles. This asymmetry ensures that not all beads respond identically to compression forces, so if one bead has a void or is unevenly compressed, other beads with different properties will compensate and maintain the seal.
Solution Approach 2:
The beads utilize varying material parameters (durometer hardness) and geometric parameters (height, width, curvature) to create a seal system where each bead operates optimally under different conditions. Softer beads deform more to fill surface irregularities, while harder beads maintain structural integrity under high compression.
3Productivity
If curing time is insufficient during manufacturing, then the manufacturing time is reduced, but voids appear in the sealing surface
Solution Approach 1:
The multi-bead design inherently provides cushioning against the harmful effect of voids. Even if some beads develop voids due to insufficient curing, the presence of other beads with proper material continuity ensures that the sealing function is maintained, compensating for the manufacturing defect.
4Ease of operation
If asymmetric forces are applied during assembly, then the assembly process is simplified, but uneven pressing force causes gaps in the seal
Solution Approach 1:
Different beads are assigned different durometer hardness values and geometric properties to optimize their response to local compression conditions. Beads in regions experiencing higher asymmetric forces are designed with softer materials and greater deformability, while beads in more uniformly compressed regions use harder materials.
Solution Approach 2:
The sealing beads are designed to dynamically adapt their deformation characteristics under compression. Softer beads deform more readily to accommodate asymmetric forces and fill gaps, while the series arrangement allows the seal system to redistribute compression forces across beads with different stiffness properties.
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 multiple bead design effectively eliminates leakage by providing a larger sealing surface and uniform assembly, ensuring that unfiltered air and dust are blocked from passing through the filter, thereby protecting downstream systems from damage.
Implementation Method 1
two protrusions with compressible material incorporated into the filter gasket for compression to the housing
Implementation Method 2
The shorter first sealing bead is able to significantly affect and control the bending of the second taller sealing bead
Data Source
AI summary
The present disclosure provides one filter with multiple standing compression seals that work together to seal against the mating filter housing assembly. The first compression bead design enables the second bead to seal against the Housing surface for maximum sealing performance for preventing unfiltered fluid from passing through a filter housing assembly.