Coiled Z-Filter Seal With Overmolded Polyurethane
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing air filter systems for engines and power generation equipment face challenges in effectively sealing and maintaining the integrity of z-filter media packs, leading to inefficiencies in contaminant removal and potential leaks, especially in coiled configurations.
Innovation Solution
The use of a coiled z-filter media arrangement with a seal arrangement that includes a preform and a molded seal component, where the seal is formed by overmolding foamed polyurethane, providing a robust seal that maintains media pack integrity and prevents leaks, even if the outermost wrap is damaged during handling or installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a coiled z-filter media arrangement is used, then filter element flexibility and adaptability are improved, but seal integrity and reliability deteriorate due to potential damage during handling and installation
Solution Approach 1:
The patent applies beforehand cushioning by providing an outer protective wrap around the coiled z-filter media arrangement. This protective wrapping is applied before the filter element is installed, cushioning the media pack against damage during handling and installation. The protective wrap maintains seal integrity while allowing the coiled configuration to retain its flexibility and adaptability for different filter element shapes.
2Ease of operation
If the outermost wrap of the coiled media pack is damaged, then handling ease is improved, but contaminant removal effectiveness deteriorates due to air leaks
Solution Approach 1:
The protective wrapping serves as beforehand cushioning that prevents damage to the outermost wrap during handling. By protecting the wrap beforehand, the system ensures that the seal integrity is maintained and air leaks are prevented, thus preserving contaminant removal effectiveness while still allowing easy handling of the filter element.
Solution Approach 2:
The protective wrapping acts as an intermediary between the coiled z-filter media arrangement and the external environment. It mediates the interaction by absorbing handling stresses and preventing direct damage to the media pack wrap, thereby maintaining sealing effectiveness while facilitating ease of operation during installation and removal.
3Ease of manufacture
If conventional seal arrangements are used on serviceable filter elements, then manufacturing simplicity is maintained, but sealing efficiency deteriorates leading to air leaks and reduced filter performance
Solution Approach 1:
The patent applies composite materials by combining the coiled z-filter media arrangement with an integrated protective wrapping system. The composite structure of the media pack and protective wrap works together to provide both structural integrity and effective sealing. This composite approach maintains manufacturing simplicity while significantly improving sealing efficiency and preventing air leaks.
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
This solution enhances the sealing efficiency of air filter systems, ensuring effective contaminant removal and maintaining filter performance by preventing air leaks through the media pack, even when the outermost layer is compromised.
Implementation Method 1
The seal is formed by overmolding foamed polyurethane
Data Source
AI summary
A filter cartridge arrangement is provided which includes a media pack comprising Z-filter media, a preform and a housing seal member. Improvements in the preform and seal member are described which include: a single beveled surface of the seal member to facilitate installation; and, an inside region of the seal member having a tip adjacent in inwardly directed lip of the preform, to control flash during molding. A variety of media pack configurations and features are described.