Filtration Membrane Substrate With Radial Stress Gradient
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing filtration elements, particularly tubular types, face mechanical stress issues due to pressure during filtration operations, leading to potential points of weakness and uneven stress distribution, which can compromise their mechanical performance.
Innovation Solution
A cylindrical filtration element with a unique geometry featuring concentrically distributed filtration zones separated by continuous porous zones, where the average thickness of the porous zones increases from the center to the periphery, optimizing mechanical resistance and reducing stress concentrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the porous zones have constant thickness throughout the support, then the manufacturing is simplified, but the mechanical stress distribution becomes uneven and maximum stress increases towards the outside of the support
Solution Approach 1:
The patent applies local quality by varying the thickness of porous zones at different radial positions. The porous zones have smaller thickness near the central axis and larger thickness near the periphery, creating locally optimized structural properties that match the stress distribution pattern. This allows the support to maintain manufacturing feasibility while achieving superior mechanical stress resistance through non-uniform thickness distribution.
2Strength
If the porous zones have increasing thickness from center to periphery, then the mechanical stress distribution becomes more homogeneous and maximum stress is reduced, but the manufacturing complexity increases
Solution Approach 1:
The patent applies parameter changes by systematically varying the thickness parameter of porous zones across the radial direction. The thickness transitions from smaller values near the central axis to larger values near the periphery, creating a gradient structure. This parameter variation optimizes stress distribution by matching structural properties to stress magnitude at different locations, achieving homogeneous stress distribution while maintaining manufacturability through controlled geometric progression.
3Device complexity
If the support uses uniform porous zone thickness, then the structure is simpler and easier to manufacture, but points of weakness appear under filtration pressure
Solution Approach 1:
The patent applies dynamics by creating a adaptive structure where the porous zone thickness dynamically responds to the stress distribution pattern. Rather than uniform thickness, the thickness varies radially to match the increasing stress magnitude from center to periphery. This dynamic structural adaptation ensures that thicker porous zones are positioned where higher stresses occur, eliminating points of weakness while maintaining overall structural simplicity and manufacturability.
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 new geometry significantly reduces average stress values and makes stress distribution more homogeneous, enhancing the mechanical robustness and reliability of the filtration element.
Implementation Method 1
the new geometry significantly reduces average stress values and makes stress distribution more homogeneous, enhancing the mechanical robustness and reliability of the filtration element
Implementation Method 2
Such a filtration element achieves, by sieve effect, a separation of the molecular or particulate species of the product to be treated, to the extent that all the particles or molecules greater than the diameter of the pores of the zone of the filtration element with which they are in contact are stopped
Implementation Method 3
During the separation, the transfer of the fluid takes place through the support and possibly the separating layer(s) when they are present, and the fluid spreads in the porosity of the support to move towards the exterior surface of the porous support
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
The present invention relates to a filtration element for filtering a fluid medium, comprising a cylindrical rigid porous substrate having a longitudinal central axis (A) and including a plurality of channels through which the fluid medium to be filtered can flow, in order for a filtrate to be obtained at the periphery of the substrate, said channels being provided in the substrate parallel to the central axis (A) thereof and defining at least three concentric filtration areas separated from one another by a continuous porous area. The invention is characterised in that the mean thickness of the porous area (Z1) closest to the central axis (A) is less than the mean thickness of the porous area (Zn-1) closest to the periphery of the substrate (1) and, moving from the central axis (A) of the substrate towards the periphery thereof, the mean thickness of a porous area is either identical to or less than that of the next area.