Satin-Weave Banded V-Belt Wrap for Noise and Friction Stability
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Solution Overview
Problem
Conventional banded friction power transmission belts, such as V-belts, often experience undesirable periodic noise and vibration due to transverse splice laps in their construction, which can lead to instability in frictional characteristics and wear resistance.
Innovation Solution
A banded friction power transmission belt with a satin-weave band fabric that includes aramid or nylon fibers, oriented either parallel to the belt axis or at a bias angle, featuring a 4×1 satin weave or modified satin weaves to minimize transverse splice laps and enhance stability and friction control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional square woven fabric is used with transverse splice laps, then the belt can be manufactured, but it causes undesirable periodic noise and vibration
Solution Approach 1:
The patent removes the harmful transverse splice laps from the belt construction by using a continuous bias-cut fabric wrap that eliminates the need for splicing operations, thereby extracting the source of periodic noise and vibration while maintaining manufacturability
Solution Approach 2:
The patent employs bias-cut fabric at a 45-degree angle to the belt axis, creating an asymmetric orientation that prevents the formation of transverse splice laps and eliminates the periodic noise and vibration associated with conventional square woven fabric constructions
2Area of stationary object
If full cover V-belts with lapped edges are used, then the fabric coverage is complete, but it creates transverse splice laps that cause noise and vibration
Solution Approach 1:
The patent eliminates transverse splice laps by using a continuous bias-cut fabric wrap that extends beyond the belt edges and is folded back, removing the need for lapped edges and complete fabric coverage while eliminating the harmful splice laps
Solution Approach 2:
Instead of lapsing fabric edges over each other to achieve full coverage, the patent inverts the approach by cutting fabric on the bias and folding it back, which provides complete coverage without creating transverse splice laps
3Device complexity
If conventional fabric weaves are used, then the belt structure is simple, but it allows rubber penetration to the belt surface reducing friction stability
Solution Approach 1:
The patent uses a composite fabric construction combining bias-cut woven fabric with specific fiber materials, creating a multi-layered structure that prevents rubber penetration to the belt surface while maintaining structural simplicity and friction 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
The satin-weave band fabric reduces rubber penetration to the belt surface, resulting in improved stability of the coefficient of friction and wear resistance, eliminating undesirable noise and vibration while being easier and cheaper to produce than conventional methods.
Implementation Method 1
controlling the frictional characteristics of the belt
Implementation Method 2
resisting wear of the belt as it contacts the sheaves (pulleys)
Data Source
AI summary
A banded frictional power transmission belt with a satin-weave, band fabric wrapped around the outside of the belt. The band fabric may be a satin weave of warp and weft yarns and may include a high-strength, wear-resistant yarn such as aramid fibers, and may include a high-adhesive yarn such as nylon and/or cotton. The aramid and/or nylon fibers may be staple or filament fibers. The band fabric may be treated. The band fabric may have a 4×1 satin weave. The band fabric may be wrapped on a bias. The high-adhesive yarn may predominantly reside on the inside of the fabric contacting said V-belt, and the high-strength, wear-resistant yarn may predominantly reside on the outside of the fabric which is the outer, pulley-contacting surface of the belt. The banded belt may be a V-belt, round belt, dual-V-belt, or multiple V-belts, or have another friction belt profile.