Rail Wheel Damping Ring Assembly That Limits Brake Heat Transfer
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Solution Overview
Problem
Existing sound damping devices for vehicle wheels, particularly those of rail vehicles, face challenges in effectively reducing noise emissions at high speeds and withstanding high temperatures while maintaining a simple design.
Innovation Solution
A sound damping device featuring a ring assembly with recesses on the first ring for clamping to the wheel body, a closure piece to prevent dislodgment, and a viscoelastic layer for noise reduction, ensuring the device does not overheat and maintains structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the ring assembly is clamped directly to the wheel body with full contact area, then the connection strength is improved, but the device overheats due to heat input from brake pads
Solution Approach 1:
The first ring is segmented with multiple recesses (at least three) in the connection area, creating discrete contact zones with the wheel body. This segmentation reduces the total contact area, allowing heat to dissipate more effectively while maintaining sufficient connection strength through the distributed contact points.
Solution Approach 2:
The recesses are strategically positioned in the connection area to create localized contact zones. This local quality modification allows the device to maintain strong connections at specific points while leaving other areas open for heat dissipation, resolving the contradiction between connection strength and temperature control.
2Temperature
If the first ring has multiple recesses for clamping, then temperature control is improved, but the device complexity increases
Solution Approach 1:
The recesses are integrated directly into the first ring structure as simple geometric features rather than separate components. This segmentation approach controls temperature without adding device complexity, as the recesses are formed as part of the ring's basic geometry.
Solution Approach 2:
The recesses in the first ring automatically serve dual purposes: they provide clamping contact points for secure attachment to the wheel body and simultaneously create heat dissipation zones. This self-service design temperature controls the device without requiring additional cooling systems or complex structures.
3Reliability
If the ring assembly is made secure against dislodgment, then reliability is improved, but the ease of installation decreases
Solution Approach 1:
The open design of the first and second rings allows the assembly to be segmented for easy installation - the rings can be opened, placed around the wheel body, and then closed into position. The recesses provide automatic alignment and secure clamping once installed, achieving both ease of installation and high reliability.
Solution Approach 2:
Instead of designing a complex locking mechanism that requires intricate installation procedures, the invention inverts the approach by using the recesses to provide passive mechanical interlocking. The simple act of closing the open rings around the wheel body automatically engages the recesses for secure attachment, simplifying installation while ensuring reliability.
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 solution provides effective noise reduction and temperature resistance, preventing overheating and ensuring the device remains securely attached, thus meeting noise regulations and maintaining wheel balance.
Implementation Method 1
a viscoelastic first layer or an open elastic ring is arranged between which a viscoelastic first layer
Implementation Method 2
viscoelastic layers are also arranged between the vibration masses
Implementation Method 3
at least the first ring has a plurality of recesses in a connection area, via which at least the first ring can be clamped to the wheel body in a recess of a wheel body. This reduces the contact area between the first ring and the wheel body when the ring assembly is connected to the wheel. As a result, the sound damping device does not overheat
Data Source
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AI summary
The invention relates to a sound-dampening device for vehicle wheels, in particular for wheels of rail vehicles, comprising a ring assembly (2) with at least one open first ring (4) and an open second ring (5), between which a viscoelastic first layer (7) or an open elastic ring is arranged. To create advantageous design conditions, it is proposed that at least the first ring (4) has a plurality of recesses in a connection area (31) via which at least the first ring (4) can be clamped to the wheel body (10) in a recess of the wheel body (10). This prevents excessive heating of the ring assembly (2).