Friction Drive Belt Adhesion Layer for Lateral Load and Fatigue Balance
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Solution Overview
Problem
Conventional frictional power transmission belts face challenges in achieving both high lateral pressure resistance and fuel saving performance, particularly in high-load environments, where they often experience peeling between layers, increased friction coefficient, and reduced durability.
Innovation Solution
A frictional power transmission belt with an adhesion rubber layer formed from a vulcanized rubber composition containing aramid short fibers and a specific filler ratio, which reduces the friction coefficient to match that of the compression rubber layer, enhancing both lateral pressure resistance and power transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rubber composition with large mechanical characteristic reinforced by short fibers is used for compression rubber layer and tension rubber layer, then lateral pressure resistance is improved, but bending fatigue resistance decreases
Solution Approach 1:
The patent applies different rubber compositions to different layers: the compression rubber layer and tension rubber layer use a rubber composition with large mechanical characteristic reinforced by short fibers for high lateral pressure resistance, while the adhesion rubber layer uses a rubber composition with relatively low mechanical characteristic for high bending fatigue resistance. This local differentiation resolves the contradiction by optimizing each layer's properties for its specific functional requirements.
Solution Approach 2:
The patent uses composite rubber compositions in each layer, incorporating short fibers (5-50 μm) and specific fillers (silica, carbon black) into the rubber matrix. The adhesion rubber layer specifically uses a composite with lower mechanical characteristics to maintain flexibility and bending fatigue resistance, while the outer layers use composites with higher mechanical characteristics for lateral pressure resistance.
2Strength
If the friction coefficient of the adhesion rubber layer is high, then adhesiveness between tension member and rubber is enhanced, but power transmission efficiency decreases
Solution Approach 1:
The patent optimizes the friction coefficient of the adhesion rubber layer by controlling the rubber composition, filler content (30-100 parts per 100 parts rubber), and short fiber characteristics. This parameter optimization achieves a balanced friction coefficient that provides sufficient adhesiveness for tension member bonding while minimizing frictional losses during power transmission, thereby improving overall power transmission efficiency.
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 solution improves durability by reducing peeling and interfacial stress, while maintaining adhesiveness and bending fatigue resistance, leading to enhanced power transmission efficiency and fuel saving performance under high-load conditions.
Implementation Method 1
a frictional power transmission belt capable of improving lateral pressure resistance received from a pulley
Data Source
Figure 1(a)~1(b)
Figure 2~3
Figure 4~5
AI summary
The present invention pertains to a friction transmission belt provided with a core extending in the long direction of the belt and an adhesive rubber layer in contact with at least part of the core, wherein the adhesive rubber layer is formed from a vulcanized rubber composition containing a rubber component, short fibers having an average fiber diameter of 2 µm or greater, and a filler.