Dual-Seal Endcap Design for Fluid Filter Sealing Reliability
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Solution Overview
Problem
Existing fluid filter systems require complex assemblies and precise manufacturing tolerances to achieve effective sealing, which can lead to inefficiencies and potential leaks during filter replacement, risking engine component damage due to unfiltered fluid bypass.
Innovation Solution
The proposed fluid filter system employs a dual-seal endcap design with a first seal member axially spaced from the filter medium and a second seal member radially spaced, providing effective sealing interfaces between the filter medium and the base and outlet port, respectively, without the need for numerous complex components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dual-seal endcap design is used, then sealing reliability is improved and assembly complexity is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent combines two seal members (first seal and second seal) into a single endcap structure that is integrated with the filter element. The first seal member is positioned at the interface between the filter element and base, while the second seal member is positioned at the interface between the filter element and outlet port. This merging of sealing functions into one component achieves reliable sealing without requiring multiple separate sealing components and their complex assembly.
Solution Approach 2:
The endcap structure provides self-alignment features where the first and second seal members are automatically positioned at correct locations during assembly. The seal members are configured to engage with corresponding surfaces on the base and outlet port, creating self-centering and self-aligning mechanisms that reduce the impact of manufacturing tolerances and eliminate the need for specialized alignment tools or procedures.
2Reliability
If multiple seal members are used, then sealing effectiveness is improved, but device complexity increases
Solution Approach 1:
The patent integrates multiple sealing functions into a single endcap component that houses both the first seal member and second seal member. This merging approach maintains effective sealing at both the base interface and outlet port interface while avoiding the complexity of assembling multiple separate seal components. The endcap itself becomes the carrier and positioning mechanism for both seals.
Solution Approach 2:
The endcap structure performs multiple functions simultaneously: it supports the filter element, provides the first sealing interface with the base, provides the second sealing interface with the outlet port, and maintains structural integrity. This multi-functionality reduces the overall number of components needed in the filter assembly while maintaining comprehensive sealing coverage.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
An endcap (32, 38) including a first plate member including a radial inner portion, a radial outer portion, and defining a longitudinal axis (18). The endcap (32, 38) also includes a flange (52) disposed between the radial inner and outer portions of the first plate member and projecting axially along the longitudinal axis (18) in a first direction. The endcap (32, 38) also includes a first seal member (42) disposed adjacent the flange (52). The first seal (42) includes a first portion thereof engaged with an axial facing surface of the first plate member and a second portion thereof engaged with a radially facing surface of the flange (52). The endcap (32, 38) further includes a second plate member disposed radially outward of the radial outer portion and a second seal member (44) disposed adjacent the second plate member including at least a portion thereof axially spaced from the axially facing surface of the first plate member in a second direction along the longitudinal axis (18) opposite the first direction.