Fluid Filter Asymmetric V-Shaped Openings Wedging
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Solution Overview
Problem
Conventional fluid filters face issues with contaminant wedging due to symmetric openings, leading to reduced filter life and increased maintenance frequency, especially in closed loop systems where continuous dirty fluid flow is not tolerated.
Innovation Solution
A fluid filter apparatus incorporating multi-stage filtration, centrifugal separation, and magnetic particle attraction, with a design featuring coaxial and annular sidewalls, strainers, and a permanent magnet to attract and remove particulates, ensuring effective removal of contaminants down to 10 microns or less, and extending filter life through self-cleaning mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If symmetric openings are used in the filter barrier, then the filter structure is simple and manufacturing is easy, but contaminants wedge into the openings causing reduced filter life
Solution Approach 1:
The patent changes the filter barrier openings from symmetric circular shapes to asymmetric V-shaped openings. This asymmetric geometry prevents spherical contaminants from wedging into the openings as effectively, allowing contaminants to be more easily removed during backflush operations. The V-shape creates a geometry where contaminants cannot establish multiple contact points simultaneously, resolving the contradiction between simple manufacturing and extended filter life.
Solution Approach 2:
The patent inverts the traditional filtration approach by implementing a self-cleaning mechanism that actively removes contaminants rather than passively filtering them. The backflush operation reverses fluid flow to dislodge and remove wedged contaminants, transforming the filter from a passive barrier that accumulates contaminants to an active system that self-cleans, thereby extending filter life without complicating manufacturing.
2Ease of operation
If back flush operation is used to dislodge contaminants, then contaminant removal is improved, but the force is limited by differential pressure capability
Solution Approach 1:
The patent introduces magnets as intermediary elements that actively attract and hold ferrous contaminants against the filter barrier. During backflush operations, these magnets continue to exert attractive force on contaminants, enhancing the dislodging mechanism. The magnetic force acts as an intermediary that supplements the limited differential pressure force, enabling more effective contaminant removal without increasing the backflush pressure beyond the filter's differential pressure capabilities.
3Duration of action of stationary object
If long thin rectangular openings are used, then contaminant wedging is reduced, but the barrier requires rigid material increasing complexity
Solution Approach 1:
The patent employs V-shaped asymmetric openings instead of long thin rectangular openings. This asymmetric geometry achieves the same goal of reducing contaminant wedging without requiring the openings to be excessively long or thin. The V-shape provides structural support while maintaining effective contaminant removal characteristics, avoiding the need for rigid materials and complex barrier structures.
4Reliability
If multiple filtration stages are combined, then filtration effectiveness is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple filtration functions into a single integrated apparatus. The filter barrier with V-shaped openings handles primary filtration, while magnets embedded in or near the barrier provide magnetic attraction for ferrous contaminants. The backflush mechanism combines contaminant dislodging and removal in one operation. This merging of filtration stages into a unified system achieves high filtration effectiveness without proportionally increasing device complexity.
Solution Approach 2:
The filter barrier serves multiple functions simultaneously: it acts as the primary filtration barrier, provides structural support for the V-shaped openings, houses or supports the magnets for attracting ferrous contaminants, and guides the backflush flow. This multi-functionality reduces the need for separate components for each function, thereby maintaining relatively simple device architecture while achieving effective multi-stage filtration.
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 apparatus achieves extended filter life by combining centrifugal separation, magnetic attraction, and multi-stage straining, allowing for continuous operation with reduced maintenance and efficient removal of contaminants, even in systems where continuous dirty fluid flow is not feasible.
Implementation Method 1
a permanent magnet that is operational to attract and remove particulates from the fluid
Implementation Method 2
imparting a continuous centrifugal velocity to the dirty fluid from the continuous helical channel formed by the vane
Data Source
AI summary
A fluid filter apparatus includes a first surrounding sidewall, a co-axial second surrounding sidewall, a co-axial third surrounding sidewall, and a co-axial fourth surrounding sidewall, an outer annulus as between the first and third surrounding sidewalls, and a domed end on the fourth sidewall, wherein a first interior is formed between the second and the fourth sidewalls. Also, a ported head body that includes two pairs of opposing inlet and outlet apertures and inlet and outlet chambers, wherein the body is adjacent to the first and third sidewalls and a filter media disposed within the first sidewall. Operationally, a dirty fluid enters therethrough the inlet aperture to the inlet chamber into the outer annulus, to the first interior, and through the dome and communicates onward therethrough the filter media and outward to the outlet chamber and to the outlet aperture.