Hydraulic Filter Material Satin Weave Support Structure
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Solution Overview
Problem
Conventional filter materials for hydraulic systems face challenges in achieving a balance between high mechanical strength and high fluid permeability, as standard weave support structures either compromise on strength or permeability due to alternating pressure loads and flow resistance.
Innovation Solution
A filter material with a support structure featuring a non-standard weave, such as a satin weave where threads overlap over multiple adjacent threads, combined with an additional fabric in plain weave connected by binding threads, and laminated onto a fleece for enhanced strength and permeability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If standard plain weave support structures are used, then mechanical strength is improved, but fluid permeability deteriorates due to high flow resistance
Solution Approach 1:
The patent changes the weave parameters from standard plain weave to satin weave, specifically using a 4-thread overlap pattern where weft threads overlap four adjacent warp threads. This parameter change creates a more open structure that reduces flow resistance while maintaining mechanical strength through the extended float lengths that distribute stress more effectively.
Solution Approach 2:
The patent employs a composite support structure combining satin weave fabric with nonwoven fabric layers. The satin weave provides the primary structural strength while the nonwoven fabric layers (such as polyester or polypropylene) provide additional support and maintain permeability, creating a multi-material system that optimizes both strength and fluid flow characteristics.
2Productivity
If larger mesh sizes are used, then fluid permeability is improved, but resistance to pressure cycling deteriorates
Solution Approach 1:
The patent changes the weave structure to satin weave with specific float lengths (4-thread overlap), which fundamentally alters how the fabric responds to pressure cycling. The extended float lengths in satin weave provide better stress distribution and elastic recovery compared to standard plain weave, enabling the fabric to withstand pressure fluctuations while maintaining larger effective mesh openings for permeability.
Solution Approach 2:
The composite structure combines the pressure-resistant properties of satin weave fabric with the durability of nonwoven fabric layers. This multi-material approach creates a support structure that maintains its integrity during pressure cycling while preserving the open structure needed for high fluid permeability.
Data Source
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AI summary
The invention relates to a filter material for fluids, in particular hydraulic fluids, comprising a single- or multi-layered filter medium (6) and a supporting structure which rests flatly on the at least one side thereof and consists of at least one individual fabric (10, 12) made of warp threads (28) and weft threads (32). Said filter material is characterized in that at least one set of warp threads (28) and/or weft threads (32) overlaps three or more adjacent warp threads (28) and/or weft threads (32) while forming a long-float weave.