Filter Element Seal Stay and Support Surfaces for Precise Mounting
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Solution Overview
Problem
Existing filter devices face challenges in ensuring proper mounting and sealing of filter elements, leading to potential misalignment and leakage, which compromises their effectiveness and ease of assembly.
Innovation Solution
The filter element design incorporates at least two support surfaces and a circumferential seal with a seal stay that projects axially, utilizing different materials and shapes to prevent misalignment and enhance sealing, while allowing for easy assembly without excessive force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a filter element is designed with simple mounting structure, then ease of assembly is improved, but mounting precision and sealing reliability deteriorate
Solution Approach 1:
The filter element is pre-assembled with the seal integrated into the frame structure before insertion into the filter housing. The seal is pre-positioned and pre-compressed against the seal surface, ensuring proper alignment and sealing contact is established before the filter element is fully installed, thereby achieving both ease of assembly and mounting precision
Solution Approach 2:
A seal element acts as an intermediary between the filter element frame and the filter housing seal surface. This seal mediates the connection, providing both the necessary sealing function and guiding the filter element into proper alignment during assembly, thus improving both ease of assembly and mounting precision simultaneously
2Reliability
If sealing force is increased to prevent leakage, then sealing reliability is improved, but risk of damaging filter element or housing deteriorates
Solution Approach 1:
The seal design utilizes material parameter changes and geometric parameter optimization to achieve effective sealing at lower compression forces. The seal material and cross-sectional shape are specifically designed to generate sufficient sealing contact pressure without requiring excessive clamping force, thereby preventing damage to the filter element or housing while maintaining sealing reliability
Solution Approach 2:
A flexible seal element is used that can deform under compression to conform to the seal surface and generate sealing contact pressure. The flexibility of the seal allows it to achieve reliable sealing with minimal compression force, avoiding damage to rigid components while maintaining sealing integrity
3Ease of manufacture
If filter element structure is simplified, then manufacturing cost is reduced, but sealing effectiveness and anti-misalignment capability deteriorate
Solution Approach 1:
The seal function is merged with the frame structure by integrating the seal into the frame assembly during manufacturing. This combination eliminates the need for separate seal installation steps and additional fastening components, reducing manufacturing complexity and cost while maintaining sealing effectiveness through the integrated design
Data Source
AI summary
A filter element for gaseous media for a filter device has a filter medium body with inflow side and outflow side at opposed axial ends. A frame element connected to the filter medium body extends at least partially circumferentially around the filter medium body and radially projects past it. A circumferential seal, provided at a frame side element facing the inflow side, extends circumferentially around a virtual axis. At least one support section, disposed at a frame element side facing the outflow side, supports the filter element at least axially in a filter housing of a filter device. The support section has at least two support surfaces, distributed about a circumferential extension of the frame element and spaced apart axially. The circumferential seal has a circumferential seal stay projecting in axial direction and sealing at least partially radially in relation to a seal surface of the filter housing.