Friction Transmission Belt With Powder Layer For Noise Reduction
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Solution Overview
Problem
Conventional friction transmission belts, such as V-ribbed belts, experience noise due to the stick-slip phenomenon when wet, and existing solutions fail to maintain a reduced friction coefficient effectively over time, leading to belt slip and noise issues under severe conditions.
Innovation Solution
A friction transmission belt with a thermoplastic resin film coated pulley contact surface and a powder layer of reduced friction coefficient powder particles, where the powder layer is formed on the molding surface before belt fabrication, ensuring the particles are buried and exposed within the thermoplastic resin film, providing long-lasting friction reduction and preventing hydroplaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a thermoplastic resin film is provided to coat the pulley contact surface, then the friction coefficient is reduced and noise is decreased, but the powder particles may be completely buried in the resin film, reducing the long-term friction reduction effect
Solution Approach 1:
The patent employs preliminary action by pre-forming the powder layer on the molding surface before the thermoplastic resin is applied. The powder particles are sprayed or applied to the mold surface in advance, creating a prepared substrate that ensures proper particle distribution when the resin is subsequently formed. This preliminary positioning prevents complete burial of particles and maintains friction reduction properties throughout the belt's service life
2Object-generated harmful factors
If reduced friction coefficient powder particles are sprayed on the pulley contact surface after belt fabrication, then the friction coefficient is reduced, but the particles are easily washed away by rain, leading to belt slip and noise
Solution Approach 1:
The patent creates a composite material structure by combining thermoplastic resin with reduced friction coefficient powder particles. The resin matrix provides structural integrity and adhesion, while the dispersed powder particles provide the friction reduction function. This composite approach ensures particles remain firmly embedded in the resin, preventing wash-off during rain while maintaining low friction coefficients
3Productivity
If the uncrosslinked rubber composition is cross-linked at high temperature, then the cross-linking reaction is accelerated, but the reduced friction coefficient powder particles may melt, deforming the belt surface
Solution Approach 1:
The patent applies parameter changes by carefully controlling the cross-linking temperature to fall within a specific range that balances two competing requirements: high enough to accelerate the cross-linking reaction (improving productivity) but low enough to prevent melting of the reduced friction coefficient powder particles (maintaining manufacturing precision). This optimized temperature parameter ensures both efficient production and surface integrity
Solution Approach 2:
The patent applies local quality by considering the different thermal properties of different components at different locations. The cross-linking temperature is selected based on the melting points of the powder particles at the surface while ensuring sufficient heat penetration for cross-linking the rubber composition in the bulk. This localized thermal management prevents surface deformation while achieving complete cross-linking
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 reduces noise and prevents belt slip due to stick-slip and hydroplaning, maintaining a low friction coefficient over time, even under severe conditions like heavy rain, and reduces wear and tear on pulleys.
Implementation Method 1
a thermoplastic resin film provided to coat a pulley contact surface of the belt body
Implementation Method 2
a powder layer made of reduced friction coefficient powder particles provided on a surface side of the thermoplastic resin film. The powder layer includes reduced friction coefficient powder particles buried in the thermoplastic resin film, reduced friction coefficient powder particles carried and exposed on the surface of the thermoplastic resin film
Implementation Method 3
the uncrosslinked rubber composition is cross-linked at a molding temperature at which the reduced friction coefficient powder particles do not melt and at which the thermoplastic resin becomes soft or melts
Implementation Method 4
at a molding temperature at which the reduced friction coefficient powder particles do not melt and at which the thermoplastic resin becomes soft or melts
Data Source
AI summary
A friction transmission belt has a belt body made of a rubber composition and wrapped around pulleys to transmit power. The belt includes a thermoplastic resin film provided to coat a pulley contact surface of the belt body, and a powder layer comprised of reduced friction coefficient powder particles provided on a surface side of the thermoplastic resin film. The powder layer includes powder particles buried in the thermoplastic resin film, powder particles carried and exposed on the surface of the thermoplastic resin film, and powder particles agglomerated and adhering to the powder particles carried and exposed on the surface of the thermoplastic resin film.