Filter Element Inner Support Webs Radial Stability
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Solution Overview
Problem
Existing liquid filters, particularly those for internal combustion engines, face challenges in stabilizing the filter medium against radial forces, leading to potential collapse under high pressures and increased pressure losses due to inadequate support structures.
Innovation Solution
The filter medium is mounted coaxially on a central tube with an inner support body featuring distributed axial and circumferential support webs that bridge the radial inner circumference to the central tube, providing stable support and minimizing pressure losses, and can include additional support structures like a grid-like media support pipe and a hydrophobic separating medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the filter medium is supported by a simple support structure, then the device complexity is reduced, but the filter medium becomes unstable against radial forces and may collapse under high pressures
Solution Approach 1:
The support body is segmented into multiple support webs distributed in axial and circumferential directions, creating a grid-like structure that provides stable support throughout the filter medium without requiring a complex continuous support structure
Solution Approach 2:
The support body extends in three dimensions with support webs distributed in both axial and circumferential directions, creating a spatial support network that stabilizes the filter medium against radial forces from multiple directions simultaneously
2Stability of the object's composition
If the filter medium is supported across its entire length, then the filter medium stability is improved, but the device complexity and material usage increase
Solution Approach 1:
The continuous support structure is segmented into discrete support webs distributed at intervals in axial and circumferential directions, providing stability throughout the filter medium while using less material and reducing structural complexity
Solution Approach 2:
Support is provided locally at distributed points through the support webs rather than through a continuous structure, with the density and distribution of support webs optimized to provide adequate stability while minimizing material usage
3Stability of the object's composition
If a robust support structure is used to prevent filter medium collapse, then the filter medium stability is improved, but the pressure losses increase due to inadequate flow paths
Solution Approach 1:
The support structure is segmented into web-like elements with significant open areas between them, allowing liquid to flow through the support structure with minimal resistance while maintaining structural stability
Solution Approach 2:
The support body has a porous or web-like structure that allows liquid penetration, providing mechanical support while maintaining adequate flow paths to minimize pressure losses
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
This configuration ensures the filter medium remains stable under high pressures, reduces pressure losses, and allows for efficient separation and removal of water from fuel, while maintaining a space-saving design and minimizing material usage.
Implementation Method 1
an inner support body, arranged between the radial inner circumferential side of the filter medium and the central tube, comprises a plurality of support webs which are distributed in axial direction and in circumferential direction across the inner support body and which serve for supporting the filter medium at least radially on the central tube
Implementation Method 2
can include additional support structures like a grid-like media support pipe and a hydrophobic separating medium
Data Source
AI summary
A filter for filtering liquids has a housing with an inlet for liquid to be filtered and an outlet for filtered liquid. A coaxial filter element with a filter medium having an interior is arranged in the housing such that the filter element separates the inlet from the outlet. A central tube is fastened to the housing and the filter element is arranged coaxially on the central tube. An inner support body is arranged in the interior of the filter medium in a radial direction of the filter element between a radial inner circumferential side of the filter medium and the central tube. The inner support body has support webs distributed in an axial direction and in a circumferential direction of the inner support body. The support webs support the filter medium at least radially on the central tube.