Filter Cover Backing System for Sealing Reliability
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Solution Overview
Problem
Existing filters with automatic backwashing systems face reliability issues due to pressure drops across the filtering mesh, which can lead to leakage, as the force from the pressure drop may exceed the force of return springs, causing the filter components to separate and lose sealing contact.
Innovation Solution
A filter design incorporating a return system with a cover backing coupled to the second cover, which is biased towards the first cover by a spring or elastic element, combined with a sleeve and keying system for proper orientation and alignment of filtering components, ensures that the pressure drop across the second cover complements the return force, maintaining sealing contact and enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the pressure drop across the filtering mesh increases to improve filtration efficiency, then the filtration performance is enhanced, but the force from the pressure drop may exceed the force of return springs, causing the filter components to separate and lose sealing contact
Solution Approach 1:
The patent introduces a second cover as an intermediary element between the filtering mesh and the first cover. This second cover receives the pressure drop force from the filtered fluid and transfers it to the filtering elements through a return system, preventing direct separation of the filtering components while maintaining sealing contact under high pressure drop conditions
Solution Approach 2:
The patent divides the cover structure into two separate covers (first cover and second cover) with distinct functions. The first cover maintains sealing contact with the filtering elements, while the second cover manages the pressure drop force from the filtered fluid. This segmentation allows each cover to specialize in its function, preventing the single cover from experiencing conflicting forces that would cause separation
2Reliability
If the force of return springs is increased to maintain sealing contact between filter components, then the reliability is improved, but the device complexity and space requirements increase
Solution Approach 1:
The patent designs the return system to automatically utilize the pressure drop force from the filtered fluid to maintain sealing contact. The second cover and return springs work together to convert the pressure drop force into a beneficial force that pushes the first cover against the filtering elements, eliminating the need for additional complex active control mechanisms
Solution Approach 2:
The patent converts the harmful effect of pressure drop force (which tends to separate the covers) into a beneficial force by designing the return system to channel this force through the second cover to the first cover. The pressure drop force that would normally cause separation is instead used to enhance sealing contact between the first cover and filtering elements
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 effectively maintains sealing contact between filter components, preventing leakage and improving the reliability of the filter by ensuring that the pressure drop across the second cover does not exceed the return force, thus maintaining efficient fluid filtration and backwashing processes.
Implementation Method 1
a return system with a cover backing coupled to the second cover, which is biased towards the first cover by a spring or elastic element
Implementation Method 2
the pressure drop across the second cover pushes the second cover against the filtering elements, thereby complementing the return system in order to ensure proper sealing contact
Data Source
AI summary
A filter comprising a casing and a plurality of filtering elements stacked between a first cover and a second cover, wherein the first cover rests against the casing in a stacking direction of the filtering elements, wherein the filter further comprises a cover backing coupled to the second cover by a return system configured to return the second cover towards the first cover, wherein the cover backing rests against the casing in the stacking direction and the second cover separates a zone of the casing adapted to receive filtered fluid from a zone of the casing adapted to receive fluid to filter.