Air-Spring Bellows Rib Structure for Self-Cleaning Dirt Removal
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Solution Overview
Problem
Air spring bellows in vehicles, particularly rail and truck applications, face damage from contamination such as sand and dust that accumulates in rolled pleats and contact areas, leading to abrasive effects and reduced functionality due to the formation of cavities from prior surface structures intended to prevent abrasion.
Innovation Solution
The air spring bellows feature a large number of arcuate ribs on its outer surface, aligned to facilitate liquid flow and flush out dirt, with specific angles and interruptions to enhance cleaning and venting, while maintaining structural integrity and spring behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If axial ribs are added to prevent abrasion and enable continuous rolling, then abrasion resistance is improved, but cavities form that collect dirt and sand
Solution Approach 1:
Instead of using protruding ribs that create pockets for dirt accumulation, the invention uses recessed grooves that channel liquid flow to actively remove dirt. The grooves are designed to guide rainwater or other liquids to flush contaminants away from the bellows surface, inverting the traditional approach of adding protective protrusions.
Solution Approach 2:
The invention converts the harmful effect of liquid water (which could cause damage) into a beneficial cleaning mechanism. By designing grooves that direct liquid flow, the system uses rainwater and other liquids to flush away sand and dust, transforming potential harm into a self-cleaning benefit.
2Strength
If radial ribs or transverse webs are added to reinforce axial ribs, then structural strength is improved, but more cavities are created for dirt deposition
Solution Approach 1:
The bellows surface is segmented into multiple longitudinal grooves running parallel to each other. This segmentation provides structural reinforcement similar to ribs while creating channels that facilitate liquid flow and dirt removal, rather than creating enclosed cavities.
Solution Approach 2:
Instead of adding transverse webs that create three-dimensional cavities, the invention uses longitudinal grooves that extend along the bellows length. This dimensional change allows liquid to flow continuously through the grooves, preventing dirt accumulation while maintaining structural integrity.
3Object-affected harmful factors
If the outer surface is made smooth, then dirt accumulation is reduced, but abrasion protection is lost
Solution Approach 1:
The invention uses hydraulic principles by designing grooves that channel liquid flow across the bellows surface. The grooves are positioned and dimensioned to optimize liquid flow patterns that flush away contaminants, using the hydraulic action of moving liquids to provide cleaning without compromising abrasion resistance.
4Ease of operation
If arcuate ribs are added to facilitate liquid flow and cleaning, then self-cleaning capability is improved, but surface complexity increases
Solution Approach 1:
The grooves are designed with arcuate curvature that follows the bellows surface geometry. This curvature optimizes liquid flow patterns by guiding water naturally along the bellows surface, enhancing cleaning effectiveness while maintaining compatibility with the bellows' rounded shape and reducing manufacturing complexity.
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 design effectively removes contaminants like sand and dust, increasing the service life and resilience of the air spring bellows by utilizing the natural flow of liquids like rainwater, without compromising the bellows' functionality or rigidity.
Implementation Method 1
the ribs are arranged in relation to one another and to the axis of the air spring bellows in such a way that, if liquid is present on the outer surface, flow or flow conditions arise through which foreign matter or dirt adhering to the outer surface can be flushed out by the liquid
Implementation Method 2
the curved ribs also produce an effect on the surface of the bellows, which, similar to, for example, the guide plates in a flow, leads to a 'less turbulent' outflow of liquid that carries dirt such as sand or dust with it and flushed out
Data Source
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AI summary
The invention relates to air-spring bellows (3) consisting of an elastomer material, which are clamped, on the ends (5, 6) thereof, between a sprung and an unsprung mass (4, 2) by means of connecting parts, and perform rolling movements during compression and release and/or rest against connecting parts, where the air-spring bellows (3) comprise, at least on parts of the outer surface thereof, a structure which is different from a substantially smooth surface, said structure containing a plurality of ribs (7) which protrude from the surface and extend across the outer surface in a curved manner, said ribs being oriented in the arrangement thereof in relation to each other and to the axis (8) of the air-spring bellows such that, when there is liquid on the outer surface, flow conditions are created by means of which foreign substances or impurities adhering to the outer surface can be washed out by the liquid.