Band Filter Support Belt Reduces Transverse Deflection

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Solution Overview

Problem

Existing band filters face challenges in maintaining adequate support for the filter belt, particularly under high loads or with wide filters, leading to potential deflection and increased tension requirements, which can result in inefficient filtration and fluid leakage.

Innovation Solution

The band filter design incorporates a fluid-permeable support belt that rests on the outside of the filter belt, with adjustable support rollers and devices to maintain contact with convex band guides, reducing transverse deflection and tension, and ensuring continuous engagement with the belt guides to prevent fluid leakage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the support belt is tensioned to hold the filter belt on the band guides, then the filter belt contact is improved, but the device complexity and tension requirements increase

Engineering Contradiction:
Improvefilter belt contactVSAvoidtensioning mechanism
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The support belt is designed to be movable along the band guides, allowing dynamic adjustment of its position. This enables the support belt to automatically adapt to different filter belt tensions and positions without requiring complex fixed tensioning mechanisms, thereby maintaining reliable contact while reducing device complexity

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The support belt automatically positions itself along the band guides based on the filter belt's position and tension. The system self-regulates the support belt's location to maintain optimal contact, eliminating the need for external tensioning devices or complex control mechanisms

Inventive Principle:
Principle #25Self-service

2Stability of the object's composition

If the support belt is tensioned to prevent deflection under high loads, then the stability is improved, but the tension requirements and risk of fluid leakage increase

Engineering Contradiction:
Improvesupport belt stabilityVSAvoidtension force
Core Design Contradiction:
Stability of the object's compositionVSForce

Solution Approach 1:

The support belt acts as an intermediary element between the filter belt and the band guides. It distributes the mechanical loads from the filter belt across multiple contact points on the band guides, reducing the peak tension forces required while maintaining stability and preventing fluid leakage

Inventive Principle:
Principle #24Intermediary (Mediator)

3Reliability

If the support belt is tensioned to prevent deflection in wide band filters, then the contact with band guides is improved, but the device complexity and tension requirements increase

Engineering Contradiction:
Improvecontact with band guidesVSAvoidsupport structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The support function is segmented into multiple discrete support points along the width of the support belt. Each segment of the support belt independently contacts the band guides, providing distributed support across wide filters without requiring a single complex high-tension structure

Inventive Principle:
Principle #1Segmentation

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 design enhances the stability and contact of the filter belt with the band guides, reducing the need for high longitudinal tension and preventing fluid leakage, while allowing for easier belt replacement and improved filtration efficiency.

Implementation Method 1

a fluid-permeable support belt (11) which is arranged on an outside of the filter belt (6)

Methodology Applied
Scientific EffectFluid permeability: Permeation

Data Source

PatentEP3372292B1Band filter
Publication Date: 2021.04.14 DIPL ING ERICH FETZER GMBH & CO KG
  • EP3372292B1 patent drawingFigure 1

AI summary

The invention relates to a belt filter (1) with a filter belt (6) which is guided around belt guides (5) to form a filter trough (7) and is supported by a circumferential support belt (11). The invention proposes support rollers (16) which press the filter belt (6) against the belt guides (5) via the support belt (11).