V-Belt Reinforcing Layer for Lateral Pressure and Flexibility
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Solution Overview
Problem
Power transmission V-belts face challenges in achieving both high resistance to lateral pressure and flexibility, leading to issues like buckling deformation, heat generation, and reduced lifespan due to insufficient fiber orientation and twisted cords in existing designs.
Innovation Solution
A power transmission V-belt with a non-twisted reinforcing layer of oriented carbon fiber filaments, spread and bonded in a sheet shape within the rubber layer, providing enhanced resistance to lateral pressure while maintaining flexibility, and incorporating a specific thickness and thermal conductivity to prevent heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If short fibers are blended in a compression rubber layer in a dispersed manner, then resistance to lateral pressure is improved, but flexibility decreases and heat generation increases
Solution Approach 1:
The invention divides the reinforcing function into two distinct components: (1) short fibers blended in the compression rubber layer for lateral pressure resistance, and (2) a separate reinforcing layer with fiber filaments oriented in the belt width direction for maintaining flexibility. This segmentation allows each component to perform its specific function optimally without the negative effects of the other.
Solution Approach 2:
The invention creates a composite structure combining the compression rubber layer containing short fibers with an additional reinforcing layer containing oriented fiber filaments. This composite material approach allows the belt to simultaneously achieve high resistance to lateral pressure through the short fibers and maintain flexibility through the oriented fiber filaments in the reinforcing layer.
2Strength
If the blending amount of short fibers is increased to ensure orientation in the belt width direction, then resistance to lateral pressure is improved, but processability deteriorates
Solution Approach 1:
The invention separates the reinforcement function into two parts: a small amount of short fibers in the compression rubber layer and a dedicated reinforcing layer with oriented fiber filaments. This segmentation allows the short fiber blending amount to be kept low (maintaining processability) while still achieving sufficient lateral pressure resistance, as the oriented fiber filaments in the reinforcing layer provide additional reinforcement.
Solution Approach 2:
The invention changes the structural parameter by introducing a separate reinforcing layer with fiber filaments oriented in the belt width direction. This parameter change allows the system to achieve high resistance to lateral pressure without increasing the blending amount of short fibers in the compression rubber layer, thereby maintaining good processability.
3Strength
If twisted cords are used in the reinforcing layer, then resistance to lateral pressure is improved, but heat generation increases due to friction between fibers
Solution Approach 1:
The invention extracts and eliminates the twisting structure from the fiber filaments in the reinforcing layer. By using non-twisted fiber filaments instead of twisted cords, the invention removes the source of friction between fibers that causes heat generation during bending, while still maintaining resistance to lateral pressure through the oriented fiber structure.
Solution Approach 2:
The invention changes the structural parameter of the reinforcing elements from twisted cords to non-twisted fiber filaments. This parameter change eliminates the friction-induced heat generation that occurs with twisted cords during belt bending, while the oriented arrangement of the fiber filaments in the belt width direction maintains the resistance to lateral pressure.
4Strength
If a reinforcing layer with fiber filaments oriented in the belt width direction is added, then resistance to lateral pressure is improved, but flexibility decreases
Solution Approach 1:
The invention carefully controls the thickness parameter of the reinforcing layer to be within 0.05 to 0.5 mm. This parameter control allows the reinforcing layer to provide sufficient resistance to lateral pressure through the oriented fiber filaments while remaining thin enough to maintain the flexibility of the belt during bending operations.
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 effectively improves resistance to lateral pressure, prolongs belt life, and prevents heat-related degradation by ensuring sufficient flexibility and efficient heat dissipation, even under high load conditions.
Implementation Method 1
the reinforcing layer has a structure in which the reinforcing fiber filaments are in a non-twisted state, are oriented in the belt width direction, and are spread and bonded in a sheet shape
Implementation Method 2
the reinforcing layer has a thickness of 0.05 to 0.5 mm and prevents heat generation of the belt
Data Source
AI summary
Provided is a power transmission V-belt containing: a rubber layer; a cord buried in the rubber layer along the belt circumferential direction; and at least one reinforcing layer buried in the rubber layer, in which the reinforcing layer contains reinforcing fiber filaments having the same length as a belt width; and contains no fibers intersecting with the belt width direction, or contains the fibers intersecting with the belt width direction in a weight per unit area of 30% or less of the reinforcing fiber filaments, in which the reinforcing layer has a structure in which the reinforcing fiber filaments are in a non-twisted state, are oriented in the belt width direction, and are spread and bonded in a sheet shape, and in which the reinforcing layer has a thickness of 0.05 mm to 0.5 mm.