Layered V-Belt Hardness Structure for Thin, Durable Power Transmission
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Solution Overview
Problem
Existing power transmission V-belts face challenges in balancing durability and fuel consumption saving, particularly under high-load conditions, where reducing belt thickness leads to increased susceptibility to buckling deformation, vibration-induced cracking, and interlayer separation.
Innovation Solution
The power transmission V-belt design features a tension member embedded in an adhesion rubber layer, with the rubber hardness of the tension rubber layer being lower than the compression rubber layer, and the adhesion rubber layer's hardness varying between the tension and compression rubber layers to enhance lateral pressure resistance and durability while maintaining fuel efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the belt thickness is reduced to save fuel and reduce weight, then fuel consumption is reduced and weight is decreased, but the belt becomes more susceptible to buckling deformation, vibration-induced cracking, and interlayer separation
Solution Approach 1:
The invention uses a composite rubber composition containing specific proportions of chloroprene rubber (40-70 parts), styrene-butadiene rubber (10-40 parts), and polybutadiene rubber (10-40 parts) per 100 parts of total rubber. This composite material structure provides both the lightweight properties needed for fuel efficiency and the enhanced mechanical strength required to prevent buckling deformation, cracking, and interlayer separation, thereby resolving the contradiction between fuel consumption and durability.
Solution Approach 2:
The invention optimizes the hardness parameters of different rubber layers: the tension rubber layer has a hardness of 70-90 degrees and the compression rubber layer has a hardness of 75-95 degrees. By carefully controlling these hardness parameters within specific ranges and adjusting the rubber composition ratios, the belt maintains sufficient structural integrity and resistance to deformation even with reduced thickness, thus achieving both fuel efficiency and durability.
2Weight of stationary object
If the belt thickness is reduced, then weight is decreased and fuel consumption is reduced, but lateral pressure resistance deteriorates
Solution Approach 1:
The invention employs a composite rubber material system combining chloroprene rubber with styrene-butadiene rubber and polybutadiene rubber in specific ratios. This composite structure provides enhanced lateral pressure resistance even in thinner belts, as the synergistic combination of rubber types improves mechanical properties without increasing thickness, thereby maintaining both reduced weight and sufficient strength.
Solution Approach 2:
The invention applies different rubber compositions and hardness values to different layers: the tension rubber layer (70-90 degrees hardness) and compression rubber layer (75-95 degrees hardness) have differentiated properties optimized for their specific functional requirements. This local quality differentiation ensures that each layer contributes optimally to lateral pressure resistance while maintaining overall belt thinness and weight reduction.
3Power
If the belt is used under high-load conditions, then power transmission capability is improved, but buckling deformation and interlayer separation occur more frequently
Solution Approach 1:
The composite rubber composition containing chloroprene rubber (40-70 parts), styrene-butadiene rubber (10-40 parts), and polybutadiene rubber (10-40 parts) provides enhanced structural stability under high-load conditions. The synergistic combination of these rubber types improves resistance to buckling deformation and prevents interlayer separation while maintaining high power transmission capability, as the composite structure distributes and absorbs mechanical stresses more effectively.
Solution Approach 2:
The invention optimizes the hardness parameters of the rubber layers to specific ranges (tension layer: 70-90 degrees, compression layer: 75-95 degrees) to balance power transmission capability and structural stability. By controlling these hardness parameters and the rubber composition ratios, the belt maintains sufficient rigidity to resist buckling deformation under high loads while preventing interlayer separation, thus resolving the contradiction between power transmission and structural stability.
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 effectively suppresses interlayer separation and cracking of the tension rubber layer, even under severe conditions, achieving both durability and fuel consumption saving over a long period while maintaining a reduced belt thickness.
Implementation Method 1
the rubber hardness of the tension rubber layer being lower than the compression rubber layer, and the adhesion rubber layer's hardness varying between the tension and compression rubber layers
Data Source
AI summary
A power transmission V-belt includes a tension member, an adhesion rubber layer in which at least part of the tension member is embedded, and a tension rubber layer and a compression rubber layer stacked via the adhesion rubber layer. A rubber hardness of the tension rubber layer is smaller than a rubber hardness of the compression rubber layer. In the adhesion rubber layer, a rubber hardness on a tension rubber layer side relative to the tension member is smaller than a rubber hardness on a compression rubber layer side.