Ventilated Brake Disc Web Layout for Lower Stress and Better Cooling
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Solution Overview
Problem
Conventional brake discs experience deformation and increased tensile stresses during braking due to the arrangement of connecting webs above holes, limiting airflow through the cooling channel and leading to potential cracking and reduced cooling efficiency.
Innovation Solution
The brake disc design features connecting webs that extend only up to one-third of the bore length, with column-like support elements that do not overlap the bore, providing additional support and airflow while reducing stress on the receiving areas, and includes a passage opening between support elements to enhance cooling air introduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If connecting webs are arranged above the bores for connecting elements, then structural support is provided, but tensile stresses increase and cooling airflow is limited
Solution Approach 1:
The connecting webs are segmented to extend only partially (maximum one-third) over the bore length rather than spanning the entire bore. This segmentation reduces the stress concentration on the bore while still providing structural support, and simultaneously allows cooling air to flow through the remaining open bore portion.
Solution Approach 2:
The connecting webs are positioned to cover only specific regions (maximum one-third of the bore length) rather than uniformly covering the entire bore. This local arrangement optimizes the balance between providing structural support where needed and maintaining open channels for cooling airflow and stress reduction.
2Stability of the object's composition
If connecting webs extend over the bores, then friction ring discs are linked, but stress on receiving areas increases
Solution Approach 1:
The connecting webs are divided into segments that extend only partially over the bores (maximum one-third of bore length). This segmentation maintains the structural connection between friction ring discs while reducing the stress concentration on the receiving areas where the connecting elements are inserted.
3Strength
If conventional connecting web arrangement is used, then structural integrity is maintained, but cooling efficiency decreases
Solution Approach 1:
The connecting webs are segmented to extend only partially (maximum one-third) over the bore length, creating open channels that allow cooling air to flow through the bore regions. This maintains structural integrity through the web connections while significantly improving cooling efficiency by enabling airflow.
Solution Approach 2:
The connecting webs are strategically positioned to cover only specific regions (maximum one-third of bore length) rather than the entire bore, creating localized support zones while leaving other zones open for cooling airflow. This local differentiation optimizes both structural integrity and thermal management.
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 stress on the brake disc components, improves stability, and enhances airflow into the cooling channel, leading to better thermal management and reduced risk of cracking.
Implementation Method 1
A cooling channel is formed between the friction ring discs, within which connecting webs are located that link the friction ring discs to one another
Implementation Method 2
enhances airflow into the cooling channel, leading to better thermal management
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
The invention relates to a brake disc (1) with a brake disc hub (2), with a friction ring (3) comprising two friction ring discs (3a, 3b), and with several pin-shaped connecting elements (4) received in respective bores (8) of receiving areas (7) of the friction ring (3) for connecting the brake disc hub (2) to the friction ring (3). The receiving areas (7) are directly attached to only one of the two friction ring discs (3a). A cooling channel (5) is formed between the friction ring discs (3a, 3b). Connecting webs (6) connecting the friction ring discs (3a, 3b) are located within the cooling channel (5). The connecting webs (6) extend from a radially outer end of the bores (8) of the receiving areas (7) over a maximum of one-third of the length of the bores (8) of the receiving areas (7).From the receiving areas (7) at least one column-like support element (9a,9b) extends from the respective connecting web (6) and does not extend over the bore (8) for the most part to the other friction ring disc (3b).