Filter Element Curved Ribs for Durable Mesh Filtration
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Solution Overview
Problem
Existing filter elements experience premature wire rupture due to shear loads from orthogonal intersections with radial ribs, particularly exacerbated in reinforced designs, reducing their durability and filtration efficiency.
Innovation Solution
Incorporation of curved ribs that reduce the number of orthogonal intersections with mesh wires, combined with strategically placed reinforcing ribs to distribute stress and enhance filtration surface area, while maintaining mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If radial ribs extend substantially orthogonal to the filtering mesh wires, then the structural strength and sector definition are improved, but the wire rupture risk increases due to shear load from backflush flow reversal
Solution Approach 1:
The patent applies curvature to the radial ribs, transforming them from straight orthogonal lines to curved arcs. This curvature modification reduces the number of orthogonal intersections with mesh wires, thereby decreasing shear load concentration on individual wires during backflush operation while maintaining the structural integrity and sector-defining function of the ribs.
2Area of stationary object
If reinforcing ribs are added to enhance filtration surface area, then the filtration capacity is improved, but the probability of rib-wire orthogonal intersections and wire rupture increases
Solution Approach 1:
The patent extends the curvature principle to reinforcing ribs as well. By making reinforcing ribs curved rather than straight, the design increases the filtration surface area while reducing the number of critical orthogonal intersections with mesh wires, thus maintaining wire durability even with enhanced reinforcement structure.
3Reliability
If curved ribs are used to reduce orthogonal intersections, then wire rupture is prevented, but the manufacturing complexity increases
Solution Approach 1:
The patent modifies the geometric parameters of the ribs from straight lines to curved arcs, changing the shape parameter while maintaining the radial orientation. This parameter change reduces orthogonal intersections with mesh wires. The manufacturing complexity is managed by using standard curved rib designs that can be integrated into existing filter element manufacturing processes without requiring entirely new fabrication methods.
Data Source
AI summary
The filter element of a filter has an internal face, an external face, a filtering mesh, two concentric edges, respectively an inner edge and an outer edge between which the filtering mesh extends, and main ribs provided at least on the internal face, the main ribs extending substantially radially between the edges and being distributed circumferentially in order to form sectors on the internal face, the filter element being configured to be assembled against a corresponding filter element so that the internal face faces the internal face of the corresponding filter element and the main ribs delimiting the sectors act to circumferentially form compartments in a space between the internal face and the corresponding filter element, the inner edge having inner passages respectively communicating with corresponding ones of the sectors, wherein at least one rib extending between the edges is a curved rib which is curved over its whole length.