Filter Element Aperture and Engaging Section Design
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Solution Overview
Problem
Existing filter elements face challenges in securing the filter housing against rotation and preventing underpressure generation, which complicates the removal of the filter housing cover and increases material costs.
Innovation Solution
A filter element design featuring a second end disk with an aperture and an engaging section that secures the filter element within the filter housing, preventing underpressure and allowing easy removal of the filter housing cover, while using elastically deformable polyurethane material for enhanced sealing and reduced material costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the second end disk is made closed off fluid-tightly, then the filter element provides good sealing, but underpressure builds up between the end disk and filter housing cover making removal difficult
Solution Approach 1:
The second end disk is segmented into a sealed peripheral region and a central aperture region. The peripheral region maintains fluid-tight sealing against the filter housing cover, while the central aperture allows pressure equalization between the interior and exterior of the filter element, preventing underpressure buildup that would hinder removal.
Solution Approach 2:
The aperture acts as an intermediary pressure equalization channel between the sealed filter element interior and the exterior environment. This mediator allows pressure balancing without compromising the sealing function of the peripheral region, enabling easy removal while maintaining sealing integrity during operation.
2Reliability
If the engaging section is made large and robust, then the filter element is securely held against rotation, but more material is required increasing cost
Solution Approach 1:
The engaging section employs an asymmetric star-shaped geometry with multiple radial arms extending from the central aperture. This asymmetric design provides multiple engagement points with the filter housing cover, ensuring secure anti-rotation holding while using less material than a solid disk of equivalent outer diameter, as the material is strategically placed only where structural function is needed.
3Reliability
If conventional materials are used for the end disks, then manufacturing is simple, but sealing performance and vibration stability are insufficient
Solution Approach 1:
The end disks utilize composite construction combining a rigid structural framework (providing shape and dimensional stability) with an elastic material layer (providing sealing capability). This composite approach achieves both excellent sealing action and vibration stability while maintaining manufacturing feasibility through processes like casting or injection molding that can integrate multiple material functions in a single component.
Solution Approach 2:
The material properties of the end disks are optimized by selecting materials with specific elastic moduli and damping characteristics. The elastic material in the engaging section provides compliant sealing that adapts to surface irregularities, while the overall structure maintains sufficient rigidity for vibration stability. This parameter optimization achieves superior performance without requiring complex multi-component assembly.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design ensures secure axial and radial sealing, reduces noise emission, and simplifies filter element exchange, achieving cost savings and improved vibration stability.
Implementation Method 1
The filter element is manufactured at least partially of an elastic material, for example, polyurethane material. The polyurethane material is in particular elastically deformable. In this way, an excellent sealing action of the engaging section relative to the counter engaging section is ensured.
Data Source
AI summary
A filter element has a filter medium with a first end and a second end in an axial direction of the filter medium. A first end disk is connected to the first end and has an outflow opening. A second end disk is connected to the second end and has an engaging section, wherein the engaging section engages a counter engaging section of a filter housing of the filter element such that the filter element is received, secured against rotation, in the filter housing. The second end disk is provided with an aperture.