Fluid Filter Element Socket for Secure Sealing and Anti-Twist Mounting
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Solution Overview
Problem
Existing filter arrangements face challenges in providing a simple and cost-effective mounting process while ensuring a secure seal and anti-twist protection between the filter element and the retaining device.
Innovation Solution
The use of a connecting socket with a polygonal cross-section, featuring alternating flat portions and curved transitions, which serves as a receiving groove for a sealing ring, provides a secure anti-twist protection and ensures a leak-free seal, simplifying production and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cylindrical connecting socket is used for mounting filter elements, then the mounting process is simple, but anti-twist protection is not provided and sealing reliability is insufficient
Solution Approach 1:
The connecting socket is designed with an asymmetric polygonal cross-section featuring alternating flat portions and curved transitions, rather than a symmetric cylindrical shape. This asymmetric geometry provides both anti-twist protection through the flat portions that prevent rotation and improved sealing reliability through the curved transitions that conform to the sealing surface, while maintaining ease of mounting through the overall polygonal shape that guides insertion
2Reliability
If separate securing elements are used to prevent release of filter elements, then anti-twist protection is provided, but device complexity increases
Solution Approach 1:
The anti-twist protection function is merged into the connecting socket structure itself through the polygonal cross-section with flat portions, eliminating the need for separate securing elements. The connecting socket simultaneously provides mounting, sealing, and anti-twist protection functions, reducing device complexity while maintaining reliability
3Reliability
If a polygonal cross-section with flat portions and curved transitions is used for the connecting socket, then anti-twist protection and sealing are improved, but manufacturing complexity increases
Solution Approach 1:
The connecting socket geometry is defined by changing the cross-sectional shape parameters from circular to polygonal with specific flat portions and curved transitions. This parameter change achieves the desired anti-twist protection and sealing improvement while maintaining manufacturability through standard forming processes that can create the polygonal cross-section in a single operation
Data Source
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Figure 7~10
AI summary
The invention relates to a fluid filter arrangement with filter element 10 and fluid filter, and to filter element therefor, having an element body 10A containing a filter means and having at least one connecting socket 21 which is open on the front face at one end of the element body for fastening of the filter element to a through-opening 6 in a retaining device in the fluid filter, wherein the connecting socket 21 comprises a lateral surface which is partially provided with a flattened portion and a bearing surface for a sealing ring 14 for cooperating with an internal wall of the through-opening. In order to simplify mounting by ensuring secure seal, a receiving groove is provided for the sealing ring 14 on the connecting socket 21, the groove base of which as a radial bearing surface for the sealing ring is having a polygonal cross section with flat portions and curved transitions alternating with one another.