Ventilated Brake Disc Rib Structure for Squeal and Thermal Inclination
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Solution Overview
Problem
Existing ventilated brake discs experience issues with in-plane vibration leading to brake squeal, uneven heat dissipation, and thermal inclination due to differences in heat storage and radiation between inner and outer plates.
Innovation Solution
A ventilated brake disc design featuring coupling ribs and circumferential ribs that secure radial rigidity, adjust natural frequencies, and enhance heat dissipation by stagnating air flow near the outer plate, thereby reducing temperature differences and suppressing thermal inclination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional ventilated brake disc structure is used, then heat dissipation is achieved through ventilation, but in-plane vibration occurs leading to brake squeal
Solution Approach 1:
The patent applies vibration control by designing circumferential ribs with specific dimensions and positions that adjust the natural frequency of the brake disc. The ribs act as vibration dampers that suppress in-plane vibrations causing brake squeal, while the ventilated structure maintains heat dissipation performance through air flow channels between inner and outer plates.
Solution Approach 2:
The patent introduces circumferential ribs at specific locations (near outer edge in radial direction) with controlled protrusion heights and gap distances. These localized structural modifications create different rigidity zones that suppress vibration at critical areas without compromising overall heat dissipation capability of the ventilated structure.
2Temperature
If conventional ventilated brake disc structure is used, then ventilation provides heat dissipation, but uneven heat dissipation occurs between inner and outer plates
Solution Approach 1:
The patent creates asymmetric thermal management by positioning circumferential ribs primarily on one plate (inner or outer) with specific gap distances to the opposing plate. This localized modification adjusts heat storage and radiation characteristics of individual plates, balancing the temperature distribution between inner and outer plates to prevent thermal inclination.
Solution Approach 2:
The patent modifies thermal parameters by controlling the gap distance between circumferential ribs and opposing plate surfaces. By adjusting this gap parameter, the heat transfer characteristics (convection and radiation) are changed, enabling independent control of heat dissipation rates for inner and outer plates to achieve uniform temperature distribution.
3Object-generated harmful factors
If circumferential ribs are added to suppress vibration, then brake squeal is reduced, but device complexity increases
Solution Approach 1:
The patent combines vibration suppression function with the existing ventilated brake disc structure by integrating circumferential ribs into the plate design. The ribs serve dual purposes: they act as vibration dampers to suppress brake squeal while maintaining the ventilated structure's heat dissipation function, avoiding the need for separate vibration control components.
Solution Approach 2:
The patent minimizes structural complexity by implementing circumferential ribs only in specific regions (near outer edge in radial direction) rather than throughout the entire disc. The ribs are continuously formed in annular shape with controlled protrusion heights, creating localized vibration suppression zones that are sufficient to reduce brake squeal without excessive structural addition.
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 suppresses brake squeal, improves heat dissipation, and reduces thermal inclination by independently setting natural frequencies and stabilizing temperature differences between inner and outer plates with a simple structural modification.
Implementation Method 1
enhance heat dissipation by stagnating air flow near the outer plate
Implementation Method 2
coupling ribs that are extending in a radial direction and that couple respective facing surfaces of the inner plate and the outer plate
Data Source
AI summary
A ventilated brake disc includes: a disc including two disc-shaped metal plates that are inner and outer plates disposed so as to face each other; an attachment member to a vehicle body; coupling ribs extending in a radial direction, and coupling facing surfaces of the inner plate and the outer plate that face each other; and a first circumferential rib provided in a region near an outer edge in a radial direction on one of the facing surfaces, protruding from a plate surface of the outer plate or the inner plate in a direction along a rotation axis of the disc toward the one of the facing surfaces, having a gap with the plate surface of the inner or outer plate, and continuously provided in an annular shape in a circumferential direction on the plate surface of the outer plate or the inner plate.