Double-Layer Friction Clutch Grooves for Heat and Debris Removal
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Solution Overview
Problem
Double clutches in vehicle drive trains face durability issues due to abrasion and thermal problems, as frictional heat dissipation is inefficient.
Innovation Solution
A double clutch design featuring a two-layer central plate with grooved friction surfaces on pressure plates and central plate components, allowing for debris removal and improved cooling through centripetal forces and air flow, enhancing thermal management and rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a double clutch is used for coupling input shaft to output shafts, then versatility and functionality are improved, but thermal dissipation capability deteriorates due to insufficient heat dissipation
Solution Approach 1:
The central plate is divided into multiple segments with individual grooves in each friction surface, allowing heat and debris to be managed independently in different zones of the clutch assembly
Solution Approach 2:
Air flow is introduced through grooves in the friction surfaces to actively cool the clutch components and remove friction heat and debris during operation
2Power
If friction surfaces are created for torque transmission, then power transmission capability is improved, but abrasion and wear increase reducing durability
Solution Approach 1:
Debris and worn material are actively removed from the friction surfaces through grooves that channel them away, preventing accumulation that would otherwise degrade performance and reduce durability
Solution Approach 2:
The centrifugal force generated during rotation, which could potentially cause debris to embed in friction surfaces, is instead utilized to actively eject debris outward through the grooves, converting a harmful effect into a beneficial self-cleaning mechanism
3Reliability
If grooves are formed in friction surfaces for debris removal, then abrasion management is improved, but structural integrity may deteriorate
Solution Approach 1:
Grooves are formed only in specific locations on the friction surfaces where debris accumulation is most problematic, rather than throughout the entire structure, maintaining strength in critical load-bearing areas
Solution Approach 2:
The grooves are configured to extend in the axial direction rather than radially, allowing debris removal functionality to be achieved without compromising the radial strength required for torque transmission
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 reduces abrasion and improves thermal dissipation, increasing the durability and efficiency of the friction clutch by transporting debris and dissipating heat, while maintaining structural integrity.
Implementation Method 1
The formation of grooves running continuously from an inner edge of a friction surface to an outer edge of the respective friction surface rotates to transport debris from the inside to the outside due to the centripetal forces applied and the air flowing through the grooves
Implementation Method 2
the grooves also bring about improved cooling of the respective element, since the rotation allows air to pass through the grooves for cooling. The resulting frictional heat can thus be at least partially carried away by the air flowing through the grooves
Data Source
Figure 1~3
Figure 4~9
Figure 10~12
AI summary
The invention relates to a friction clutch (1), particularly for the drive train of a motor vehicle, for coupling an input shaft to a first output shaft and/or a second output shaft, comprising a double-layer central plate (2), a first pressure plate (3), which can be axially moved in order to compress at least one first friction lining (28) of a first clutch disk arrangement (26) between the first pressure plate (3) and the central plate (2), and a second pressure plate (4), which can be axially moved in order to compress at least one second friction lining (29) of a second clutch disk arrangement (27) between the second pressure plate (4) and the central plate (2), in which a frictional connection between a friction surface (30, 42) of the respective pressure plate (3, 4) and friction linings (28, 29) of the respective clutch disk arrangement (26, 27), and between the friction linings (28, 29) of the respective clutch disk arrangement (26, 27) and a friction surface (43, 44) of the central plate (2), can be produced and released by means of the axial movement of the first (3) and second (4) pressure plates. The invention is characterised in that at least one of the following elements: the first friction surface (30) of the first pressure plate (3); the second friction surface (42) of the second pressure plate (4); and at least one of the friction surfaces (43, 44) of the central plate (2), is embodied with at least one groove (7, 15) which extends respectively from an inner edge (31) of the respective friction surface (30, 42, 43, 44) to an outer edge (32) of the respective friction surface (30, 42, 43, 44).