Compressible Filter Seal Undercuts for Leak-Resistant Alignment
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Solution Overview
Problem
Conventional filtration systems for internal combustion engines face challenges in maintaining proper alignment and secure installation of filter elements due to inadequate seal integrity, leading to potential leakage and contamination.
Innovation Solution
A filtration system design featuring a filter housing with complementary undercuts and a filter seal member having lobes and tabs that align and lock into a seal ring, ensuring proper installation and maintaining a sealed interface through a compressible seal path reinforced by internal members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional seal members are used in filtration systems, then the filter element can be installed in the housing, but proper alignment and secure locking under vibration conditions cannot be ensured
Solution Approach 1:
The seal member is divided into multiple functional segments: a compressible seal portion for initial sealing, alignment features (protrusions and recesses) for positioning, and locking features (undercuts and tabs) for securing. This segmentation allows each feature to perform its specific function independently, ensuring reliable alignment and locking without requiring an overly complex integrated structure.
Solution Approach 2:
The seal member incorporates asymmetric features including undercuts at specific locations, non-uniform lobe distributions (first and second pluralities of lobes), and strategically positioned tabs. These asymmetric elements provide directional alignment and prevent rotation or misalignment under vibration, achieving reliable locking without symmetric complexity.
2Reliability
If a secure locking mechanism is implemented to prevent leaks under vibration, then filtration reliability improves, but the installation and alignment process becomes more difficult
Solution Approach 1:
The seal member is pre-configured with alignment features (protrusions matching recesses, positioned lobes, and pre-formed undercuts) that automatically guide proper alignment during installation. The compressible seal portion is pre-positioned to engage the housing seal surface first, followed by automatic engagement of locking features, making the installation process intuitive and error-resistant.
Solution Approach 2:
The seal member utilizes compressibility as a key parameter, allowing the seal portion to deform during installation to accommodate minor misalignments, then maintain secure contact under vibration. The material properties and geometric parameters ( undercut depth, lobe size, tab positioning) are optimized to provide easy installation while ensuring reliable locking.
3Ease of manufacture
If the seal member design is simplified for ease of manufacture, then production cost decreases, but alignment precision and locking security under vibration are compromised
Solution Approach 1:
The seal member is designed as a multi-functional component that combines sealing, alignment, and locking features in a single element. The same geometric features (lobes, undercuts, tabs) serve multiple purposes: the lobes provide both sealing contact and alignment reference, while the undercuts simultaneously lock the seal in position and prevent vibration-induced displacement. This multi-functionality reduces the need for separate alignment and locking components, simplifying manufacturing while maintaining precision.
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 system ensures secure alignment and locking of filter elements within the housing, preventing leakage and maintaining effective filtration performance even under vibration, thereby enhancing the integrity of the filtration process.
Implementation Method 1
The lobes and tabs of the filter seal member are configured to align and lock within a complementary seal ring, providing a circuitous datum seal path and distributed compressive force
Implementation Method 2
An undercut is positioned along the first member portion, the undercut configured to receive and form a seal with a filter seal member of a filter element
Data Source
AI summary
Various embodiments relate to a filter housing seal member. The filter housing seal member includes a first member end and a second member end disposed axially away from the first member end. A first member portion is disposed between the first member end and the second member end. A second member portion is disposed between the first member end and the second member end. The second member portion is disposed radially away from the first member portion. An undercut is positioned along the first member portion, the undercut configured to receive and form a seal with a filter seal member of a filter element.