Safety Filter Element With Integrated Shell And Seal
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Solution Overview
Problem
Current safety filter elements in filter assemblies are not optimized for efficient maintenance, often requiring frequent replacement and can be incorrectly installed, leading to inefficiencies and increased costs due to the need for separate seal members and protective shells for both primary and secondary filter elements.
Innovation Solution
A safety filter element design that incorporates a shell with a cavity to receive the primary filter medium pack, featuring a first seal member with a single-fold rotational symmetry contour for secure coupling and reduced installation errors, allowing the safety filter element to remain locked in the system during primary filter element replacement, thus simplifying maintenance and reducing component requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate seal members and protective shells are provided for both primary and secondary filter elements, then each filter element can be independently protected and sealed, but the device complexity increases and maintenance efficiency decreases
Solution Approach 1:
The patent combines the protective shell and seal member functions into a single integrated shell structure. The shell includes a first sealing surface that seals with the primary filter element and a second sealing surface that seals with the housing, eliminating the need for separate seal members for each filter element. This reduces component count while maintaining reliable sealing and protection for both filter elements.
2Ease of operation
If the safety filter element is designed to be replaced frequently along with the primary filter element, then maintenance procedures are simplified, but the loss of time and increased cost occur due to replacing a still-functional safety filter
Solution Approach 1:
The patent segments the filter system into two independently replaceable units: the primary filter element and the safety filter element. The safety filter element is designed as a separate, reusable component that remains in the housing after primary filter replacement. This allows the primary filter to be replaced frequently while the safety filter continues to provide protection, reducing unnecessary replacements and associated time losses.
Solution Approach 2:
The safety filter element is designed to be recovered and reused rather than discarded with each primary filter replacement. The integrated shell and sealing surfaces allow the safety filter element to be removed, inspected, and reinstalled with subsequent primary filter elements, extending its service life and reducing waste of functional components.
3Productivity
If the safety filter element can remain locked in the system during primary filter replacement, then maintenance efficiency is improved and component costs are reduced, but the ease of manufacture decreases due to more complex assembly requirements
Solution Approach 1:
The safety filter element is pre-assembled with the integrated shell and sealing surfaces before installation in the housing. The positioning elements and sealing surfaces are prepared in advance, allowing the safety filter element to be installed once and remain locked in place during subsequent primary filter replacements. This preliminary assembly reduces maintenance complexity while the initial manufacturing complexity is justified by long-term maintenance efficiency gains.
Data Source
AI summary
The present disclosure relates to a safety filter element for backing up a failure of a main filter element comprising a primary filter medium pack. The safety filter element comprises a secondary filter medium pack and a shell wherein a first portion of an inner side of a circumferential wall of the shell is surrounding a circumferential side of the secondary filter medium pack, and wherein a second portion of the inner side of the circumferential wall of the shell is radially delimiting a cavity located between a first opening of the shell and a fluid inlet side of the secondary filter medium pack. The cavity allows for receiving or at least partly receiving the primary filter medium pack of the main filter element. The safety filter element comprises a first seal member that comprises a first circumferential sealing portion for sealing to the shell and a second circumferential sealing portion for sealing to the main filter element. The second circumferential sealing portion has a contour shape of single-fold rotational symmetry.