Annular Friction Lining Groove Layout for Oil Cooling Control
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Solution Overview
Problem
Existing friction parts for frictionally operating devices with annular surfaces face challenges in optimizing friction coefficient characteristics and fluid cooling and distribution, particularly during high engagement conditions, where the existing groove designs fail to efficiently manage fluid flow and heat dissipation.
Innovation Solution
The proposed friction part features a unique groove design with branching points and connecting points that include obliquely running channels, optimizing fluid flow by directing it tangentially rather than radially, and incorporating outlet openings to enhance fluid distribution and cooling, with groove sets connected at these points to improve friction characteristics and cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional groove designs are used in friction parts, then the structure is simple, but the friction coefficient characteristics cannot be optimized at high engagement points and fluid cooling distribution is insufficient
Solution Approach 1:
The groove set is segmented into multiple grooves (at least five grooves including first, second, third, fourth, and fifth grooves) that branch and connect at specific points. This segmentation allows each groove to serve specific functions for fluid distribution and friction optimization at different engagement points
Solution Approach 2:
Different regions of the friction surface are provided with grooves of different orientations and configurations. The obliquely running grooves are specifically positioned to address high engagement friction coefficients at certain operating points, while connecting points are strategically located to optimize fluid flow paths for cooling distribution
2Temperature
If fluid flows directly radially outward through grooves, then the flow path is short, but the steel plate contact area is reduced and cooling efficiency is insufficient
Solution Approach 1:
The grooves are designed to run obliquely rather than radially, creating a curved or angled flow path that follows the tangential direction. This curved path configuration increases the flow path length while maximizing contact with the steel plate surface for improved cooling efficiency
Solution Approach 2:
The fluid flow is redirected from a purely radial direction to include a tangential component through the oblique groove orientation. This dimensional change in flow direction allows the fluid to traverse a longer path across the friction surface, increasing the steel plate contact area and cooling effectiveness
3Reliability
If groove sets are not connected at connecting points, then the structure is simpler, but the fluid distribution and cooling are insufficient
Solution Approach 1:
Multiple grooves are merged and connected at specific connecting points to form an integrated groove set. The second and fourth grooves open into a first connecting point, while the third and fifth grooves open into a second connecting point, creating a unified fluid distribution network that enhances cooling coverage
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 enhances friction characteristics and fluid distribution, allowing for improved heat dissipation and optimized fluid flow, thereby addressing the limitations of existing groove designs in managing high friction engagement conditions.
Implementation Method 1
the flow of the fluid, for example cooling oil, within the grooves can be optimized. Here, it is sought to conduct the fluid, for example oil, in a tangential direction rather than directly radially outward
Implementation Method 2
the cooling and distribution of a fluid during the operation of the friction part can be improved. The fluid is for example oil
Implementation Method 3
a friction part for a frictionally operating device, having an annular friction surface
Data Source
AI summary
A friction part for a frictionally operating device includes a friction lining carrier and a friction lining. The friction lining includes friction lining pieces arranged in two rows to form an annular friction surface. The friction surface has an inner edge, an outer edge, and a groove set. The groove set has a first stem groove between the inner edge and a first branching point, a first branch groove between the first branching point and a first connecting point, a second branch groove between the first branching point and a second connecting point, a third branch groove between a second branching point and the second connecting point, and a second stem groove between the second connecting point and the outer edge. The first stem groove, and first and second branch grooves form a y shape. The second stem groove, and second and third branch grooves form an inverted y shape.