Friction Transmission Belt Surface Layer for Noise and Torque Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing frictional power transmission belts face challenges in noise suppression while maintaining transmission efficiency and durability, particularly due to the limitations of plasticizers and polyvinyl alcohol-based resins, which suffer from heat resistance issues and increased torque loss.
Innovation Solution
A frictional power transmission belt with a compression rubber layer and a surface layer made from a cured rubber composition containing polyvinyl pyrrolidone-based resin and an elastomer component, which improves noise suppression and maintains transmission efficiency and durability by stabilizing the frictional state and reducing internal heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a surface layer containing plasticizer is formed on the frictional power transmission surface to improve noise suppression, then noise suppression is improved, but heat resistance deteriorates and torque loss increases
Solution Approach 1:
The invention changes the chemical composition parameters of the surface layer by replacing plasticizer with polyvinyl alcohol-based resin particles (5-50 parts by mass per 100 parts by mass of rubber). This substitution fundamentally alters the friction surface properties to achieve noise suppression without the heat resistance deterioration and torque loss associated with plasticizer-based solutions
Solution Approach 2:
The invention creates a composite surface layer structure combining rubber base material with dispersed polyvinyl alcohol-based resin particles. This composite formulation allows the resin particles to modify friction characteristics and suppress noise while the rubber matrix maintains structural integrity and heat resistance, avoiding the torque loss problem of plasticizer-based approaches
2Object-affected harmful factors
If a surface layer containing polyvinyl alcohol-based resin is coated on the frictional power transmission surface to improve noise suppression, then noise suppression is improved, but transmission loss increases due to increased torque loss
Solution Approach 1:
The invention optimizes the concentration parameter of polyvinyl alcohol-based resin particles within the specific range of 5-50 parts by mass per 100 parts by mass of rubber. This precise parameter control ensures sufficient noise suppression while preventing excessive friction and torque loss that would lead to increased transmission loss
Solution Approach 2:
The invention applies polyvinyl alcohol-based resin particles specifically to the frictional power transmission surface layer, creating a localized functional modification. The resin particles are concentrated at the friction interface where noise generation occurs, while the bulk rubber material maintains its original transmission efficiency characteristics, thus achieving noise suppression without significant transmission loss
3Object-affected harmful factors
If the friction coefficient is decreased to reduce stick-slip noise, then stick-slip noise is reduced, but transmission performance deteriorates
Solution Approach 1:
The invention creates a dynamic friction surface where polyvinyl alcohol-based resin particles provide variable friction characteristics. During normal operation, the resin particles maintain optimal friction for power transmission, but during stick-slip conditions, they modify the friction behavior to suppress noise, thus achieving both transmission performance and noise reduction
Solution Approach 2:
The polyvinyl alcohol-based resin particles act as an intermediary substance at the friction interface between the belt and pulley. These particles mediate the friction interaction by providing a controlled friction modification mechanism that suppresses stick-slip noise while maintaining sufficient friction for effective power transmission, avoiding the need to simply decrease the overall friction coefficient
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 belt effectively suppresses noise and maintains high transmission efficiency and durability by stabilizing the frictional state and reducing internal heat generation, with the polyvinyl pyrrolidone-based resin providing improved crack resistance and hydrophilicity.
Implementation Method 1
it is a problem to reduce a friction coefficient of a belt surface (i.e., pulley engagement surface) in contact with a pulley to improve noise easily generated when misalignment (imperfect alignment) occurs in the pulley or noise caused by a stick-slip phenomenon
Implementation Method 2
when wettability of a frictional power transmission surface is so low that the state of water entering between a belt and a pulley is not uniform, the friction coefficient is high in a place the water has not entered (i.e., dry state) while the friction coefficient is extremely decreased locally in a place the water has entered (i.e., wet state)
Implementation Method 3
a frictional power transmission belt that can stabilize a frictional state of a frictional power transmission surface and improve noise suppression while maintaining transmission performance and fuel saving performance
Data Source
AI summary
A frictional power transmission belt includes a compression rubber layer that includes a frictional power transmission surface at least a part of which can come into contact with a pulley and that is formed of a cured product of a rubber composition. On a surface of the frictional power transmission surface, a surface layer comprising a cured product of a rubber composition containing a polyvinyl pyrrolidone-based resin and an elastomer component is laminated.