Air Spring Bellows Bead Reinforcement for Lateral Load Sealing
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Solution Overview
Problem
Air suspension bellows in rail vehicles face premature wear and leakage due to detachment of fabric reinforcement ends from the bellows wall, especially under multi-dimensional loads, leading to loss of sealing and structural integrity.
Innovation Solution
The reinforcement fabric layers are arranged in a wavy or meandering shape around the bead cores, allowing for greater flexibility and reducing tension peaks during lateral movements, thereby preventing detachment and maintaining a secure seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the fabric layers are wrapped around the cores and vulcanized to the bellows wall, then the connection strength is improved, but the fabric layer ends detach during lateral movements causing loop rupture
Solution Approach 1:
The fabric layers are arranged in a wavy or meandering pattern instead of a straight configuration. This curved geometry provides deformation capacity during lateral movements, absorbing stress peaks and preventing detachment while maintaining secure attachment to the bellows wall through vulcanization.
Solution Approach 2:
The patent changes the geometric configuration parameter of the fabric layers from straight to wavy/meandering. This parameter change increases the effective length and deformation capacity of the fabric layers, enabling them to accommodate lateral movements without detaching from the bellows wall.
2Stability of the object's composition
If the fabric layers are securely attached to the bellows wall, then the structural integrity is improved, but stress peaks occur during lateral movements causing detachment
Solution Approach 1:
The wavy or meandering arrangement of fabric layers introduces geometric curvature that acts as a stress-distributing mechanism. During lateral movements, this curved configuration allows gradual deformation rather than abrupt stress concentration, reducing stress peaks while maintaining structural integrity.
Solution Approach 2:
The wavy configuration of the fabric layers beforehand provides a cushioning effect against lateral movements. The pre-existing geometric form allows the fabric to absorb and distribute stresses before they can concentrate into damaging peaks, preventing detachment while maintaining integrity.
3Ease of manufacture
If the fabric layers are arranged straight around the cores, then the manufacturing process is simplified, but additional length is needed to absorb deformation
Solution Approach 1:
By arranging the fabric layers in a wavy or meandering pattern, the patent effectively increases the functional length of the fabric within the same spatial envelope. This curved configuration provides additional material length for deformation absorption without requiring a longer straight fabric piece, maintaining manufacturing simplicity while achieving the needed deformation capacity.
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 significantly reduces the risk of loop breakage and maintains the air bellows' attachment to connecting parts, ensuring operational reliability and extended service life by absorbing multi-dimensional loads without premature wear.
Implementation Method 1
the fabric layers of the air spring bellows reinforcement are arranged in a wavy or meandering pattern around the annular cores, providing additional length to absorb deformation and reduce stress peaks
Data Source
Figure 1~4
AI summary
The invention relates to an air spring bellows (2) of an air spring (1), which can be sealedly attached with its two open ends to connecting parts (3, 4) of two spaced-apart components, and which, in the assembled state of the air spring (1), at least partially delimits a working chamber (5) filled with compressed air, wherein the air spring bellows (2) is formed from an elastomer in which a fabric-like reinforcing element (14) and an annular core (7, 11) are embedded in at least one end bead (6, 10), and wherein the at least one core (7, 11) is at least partially enclosed by the fabric-like reinforcing element (14).In order to improve the operational reliability and the load-bearing capacity of the air spring bellows (2), it is provided that the reinforcing element (14) is not smooth but wavy or meandering in the axial direction of the air spring bellows (2) and is arranged close to at least one of the ridges (6, 10) in the elastomer.