Angled Interface Ring Filter Housing Leak Prevention
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Solution Overview
Problem
Existing filter designs often suffer from leaks, which compromise their effectiveness in applications such as engine fuel purification and industrial gas filtration, necessitating improvements to prevent fluid or gas escape.
Innovation Solution
A filter housing design featuring an interface ring with a specifically angled ring wall, which is self-supporting and secured to the can without additional seals or welds, enhancing the structural integrity and preventing leaks by maintaining a seal with the filter head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional filter designs are used, then the structure is simple and easy to manufacture, but leaks occur compromising filter effectiveness
Solution Approach 1:
The filter housing is segmented into distinct functional zones: an interface ring portion for structural support and sealing, and a can portion for containment. This segmentation allows each part to be optimized independently - the interface ring provides leak prevention through its angled geometry while the can provides simple containment, resolving the contradiction between reliability and complexity.
Solution Approach 2:
The interface ring acts as an intermediary element between the filter element and the can housing. It mediates the connection by providing a self-supporting sealed structure that eliminates leaks without requiring additional sealing components or complex assembly procedures, thus improving reliability without increasing device complexity.
2Strength
If wall thickness is reduced to minimize material use, then manufacturing cost decreases, but burst pressure resistance is compromised
Solution Approach 1:
The interface ring features a non-zero angle geometry that concentrates structural strength locally at the critical sealing interface. This local quality enhancement allows the housing to achieve high burst pressure resistance (at least 1700 psig) with minimal wall thickness (1.1 mm), as the angled interface ring provides the necessary structural reinforcement only where needed rather than requiring thick walls throughout the entire housing.
3Reliability
If additional seal members and welds are added to prevent leaks, then leak prevention improves, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The design extracts and eliminates the need for additional seal members and welds by incorporating the sealing function directly into the interface ring geometry. The self-supporting angled structure of the interface ring provides inherent sealing capability, removing the need for separate sealing components and complex welding operations, thus improving seal integrity while simplifying manufacturing.
Solution Approach 2:
The interface ring is designed to be self-supporting and self-sealing within the can housing. Its non-zero angle geometry automatically provides both structural support and leak prevention without requiring external assistance from additional seals or welds, making the assembly process simpler while maintaining high seal integrity.
Data Source
AI summary
A filter assembly includes a filter head and filter cartridge. The filter cartridge includes a housing and element. The housing includes a can with an open mouth. An interface ring is secured to the can adjacent to the open mouth. The outer ring surface is against the inner wall of the can. The ring wall is angled between the first and second ends greater than one degree and less than 6 degrees. Methods of filtering and making the housing are provided.