Axially and Radially Cooled Brake Disk with Static Cover
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Solution Overview
Problem
Existing brake disk designs for high-performance vehicles and aircrafts face inefficiencies in cooling, leading to excessive temperature increases, shape distortion, and costly repairs due to mixing of hot and cold air streams through axial and radial channels, resulting in reduced operational safety and increased maintenance needs.
Innovation Solution
An axially and radially cooled brake disk with a cover is designed, featuring primary vanes with through channels and secondary vanes inside a static cover, allowing for efficient airflow and preventing temperature extremes by directing cooling air through a system of channels and gaps that enhance airflow and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If axial and radial cooling channels are interconnected in a solid brake disk, then cooling air can pass through the disk body, but hot and cold air streams mix which significantly reduces cooling efficiency
Solution Approach 1:
The brake disk is segmented into multiple independent cooling channels (axial channels, radial channels, and helical channels) that remain separate throughout the disk structure. This segmentation prevents mixing of cooling air streams while allowing comprehensive cooling coverage across the brake disk body, directly resolving the contradiction between achieving temperature reduction and maintaining cooling efficiency.
2Quantity of substance
If radial vanes are created in a hollow disk for air passage, then throughput for air is achieved, but only the space between vanes is used which limits cooling effectiveness
Solution Approach 1:
The invention transitions from two-dimensional radial vanes to three-dimensional helical channels that coil around the radial axis. This dimensional change allows cooling air to traverse the entire volume of the brake disk rather than just flowing between vanes, significantly increasing the effective cooling surface area and improving cooling effectiveness while maintaining high air flow quantity.
3Quantity of substance
If high quantity of cooling air is supplied through rectilinear flow in radial direction, then air passage is achieved, but cooling efficiency remains low requiring even higher air quantity
Solution Approach 1:
The invention replaces rectilinear radial flow channels with helical channels that follow a curved path around the radial axis. This curvature extends the flow path length and increases the surface area for heat transfer between the cooling air and brake disk. The result is improved cooling efficiency that reduces the total quantity of cooling air required while maintaining effective temperature control.
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 improves cooling efficiency, reducing material wear, repair costs, and downtime by ensuring consistent airflow and effective heat management, thereby enhancing operational safety and reducing maintenance demands.
Implementation Method 1
Cooling of brake disks is usually achieved by means of directed streams of cooling air. Its supply to the disk is effected through an air catcher, which contains a system of air channels that are emptied into the wheel hub. The wheel hub contains at least one air channel for the passage of air, which is led into the centre of the brake disk.
Implementation Method 2
The cooling air flows through the body of the disk... The brake disk is chosen so as to allow the cooling air flow through the body of the disk... axial systems of air channels passing through the solid body of the brake disk
Data Source
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AI summary
Brake disk contains through channels (7) running across primary vanes (4) skewly to the inter-vane space (5). At least part of the brake disk body (1) is equipped with a static cover (8) in which a system of secondary vanes (9) is located. Channels (7) are preferably arranged in rows, where they have a bore increasing with increasing distance from the brake disk centre. The secondary vanes (9) are in the number of at least the number of primary vanes (4) and their impact surfaces (10) are directed against the cooling air flow direction. Primary vanes (4) and secondary vanes (9) are bent, but inversely. There are primary gaps between secondary vanes (9) and circumferential wall (13) of a cover (8), and secondary gap interconnected with primary gaps is between the brake disk and supporting wall (11) of the cover (8). Space around the brake disk body (1) is interconnected with channels (7) and led out through the wheel disk outside the wheel.