Filter Endcap Sealing Surface Design for Hydraulic Leakage
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Solution Overview
Problem
Current filter assemblies face challenges in providing simple and efficient access to replaceable filter elements, leading to potential leakage and misalignment issues during maintenance, which increases contamination risks in hydraulic systems.
Innovation Solution
A filter assembly design featuring a filter element housing plate with integral external rounded polygon shaped sealing surfaces on the endcaps, which engage with female cavities to ensure secure sealing and alignment, replacing traditional radial O-ring seals and preventing twisting during installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional radial O-ring seals are used in filter assemblies, then the sealing mechanism is simple, but misalignment and twisting during installation occur leading to leakage
Solution Approach 1:
The patent applies curvature by using a rounded polygon-shaped sealing surface instead of a traditional flat or radial seal interface. The endcap features a rounded polygon external sealing surface that mates with a corresponding rounded polygon internal sealing surface in the filter housing, eliminating the twisting and misalignment issues associated with radial O-ring seals while maintaining sealing effectiveness.
2Productivity
If replaceable filter elements are used, then maintenance is required periodically, but access to filter elements becomes complex and time-consuming
Solution Approach 1:
The patent divides the filter assembly into separable components: a filter housing and a replaceable filter element with endcap. The rounded polygon sealing surface is integrated into the endcap, allowing the filter element to be easily detached from the housing by simply aligning and pushing the segmented components together or apart, significantly reducing maintenance time and complexity.
3Manufacturing precision
If integral external rounded polygon shaped sealing surfaces are used on endcaps, then alignment and sealing are improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the sealing surface directly into the endcap structure as an integral feature rather than a separate component. The rounded polygon external sealing surface is formed as part of the endcap during manufacturing, eliminating the need for separate sealing rings or complex assembly steps while achieving precise alignment and reliable sealing.
Data Source
AI summary
A filter assembly includes a cylindrical filter housing, a filter element housing plate positioned between a high pressure and a low pressure side of the filter housing, the filter element housing plate having a plurality of one female cavities, and a plurality of replaceable filter elements within the filter housing. Each replaceable filter element has an endcap with an external rounded polygon shaped sealing surface engaging peripheral surfaces of an associated female cavity of the filter element housing plate and sealing against peripheral surfaces of the female cavity of the filter element housing plate.