Serrated Seal Filter Element for Vibration-Resistant Sealing
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Solution Overview
Problem
Conventional air filters for internal combustion engines face challenges in maintaining reliable and temperature-resistant sealing, especially under vibration and extreme temperature conditions, while avoiding metallic elements for thermal disposal and ensuring high filtration efficiency.
Innovation Solution
A filter element with a V-shaped seal and sealing groove configuration using a two-component plastic end plate, combined with a foamed plastic or elastomer V-shaped seal, and optional stays for enhanced sealing, along with a thixotropic application method for producing end plates and annular grooves, ensures a high sealing effect and support within the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional sealing design is used, then the filter element can be manufactured simply, but the sealing action is not reliable under vibration and extreme temperature conditions
Solution Approach 1:
The seal is designed with a V-shaped cross-section instead of a conventional flat or rounded profile. This curved angular geometry allows the seal to conform to the sealing surface while maintaining structural integrity under vibration and temperature extremes, resolving the contradiction between reliability and complexity
Solution Approach 2:
The seal combines a rigid support structure with a flexible sealing element in a composite construction. The rigid portion provides structural stability while the flexible portion ensures reliable sealing contact, achieving both reliability and manageable complexity
2Strength
If metallic elements are used in the filter element, then the structural strength is improved, but thermal disposal becomes problematic
Solution Approach 1:
The material composition is changed from metallic to non-metallic (plastic/polymer) while maintaining structural strength through optimized geometry and material selection. This parameter change enables thermal disposal without compromising strength, resolving the contradiction between structural integrity and ease of disposal
Solution Approach 2:
The filter element is designed as a disposable component made from thermally disposable materials. The design accepts that the component has a limited service life and is replaced rather than repaired, making the use of non-metallic, easily disposable materials economically viable while maintaining sufficient strength during use
3Reliability
If the seal is made more complex to improve sealing under vibration, then the sealing effect is enhanced, but the manufacturing process becomes more difficult
Solution Approach 1:
The V-shaped seal geometry is pre-formed during the molding process rather than requiring post-manufacturing assembly or adjustment. This preliminary action integrates the complex sealing feature into the basic manufacturing process, enhancing sealing reliability without significantly increasing manufacturing difficulty
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 solution provides a reliable and vibration-resistant sealing action, maintaining filtration efficiency even under extreme conditions, and allows for thermal disposal without metallic elements, ensuring effective separation of unfiltered and filtered air.
Implementation Method 1
an elastomer or a foamed plastic material in the form of a V-shaped seal is provided
Implementation Method 2
the filter system is provided with two annular grooves that in the area of the sealing action communicate with the sealing contour of the filter element
Implementation Method 3
The end plate can also be attached to the filter element by a hot-plate welding method
Implementation Method 4
There is also the possibility of heating the end plate by infrared radiation and to embed the filter element into the heated thermoplastic material
Data Source
AI summary
The invention relates to a filter element consisting of a filter medium (10) that is pleated in a zigzag manner and has a concentric shape, and a first end disk (11) and a second end disk (12) disposed on an opposite front, wherein the end disk (12) has a concentric opening (13) and extends substantially annularly across the pleats of the filter medium. The end disk (11) has a ring collar (14) extending radially toward the outside. Said ring collar (14) has a seal (15) that surrounds the ring collar at least partially, wherein the seal has an axially extending region, which carries radially peripheral sealing lips (17), and said radially peripheral sealing lips are supported in a groove (18) or in a housing wall (19) of a housing receiving the filter element.