Conveyor Belt Core Layer Width Strength Ratio
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Solution Overview
Problem
Conveyor belts suffer from premature damage and reduced service life due to longitudinal tearing caused by objects being fed onto the upper cover rubber, particularly when the weight or height of the objects is significant, as the core layer's strength in the belt width direction is insufficient to withstand the impact.
Innovation Solution
The conveyor belt incorporates a core layer with a strength in the belt width direction ranging from 30% to 70% of its strength in the belt longitudinal direction, providing enhanced resistance to longitudinal tearing by reinforcing the core layer, especially in the outermost and innermost layers or across all layers, and strategically positioning this reinforcement in areas most susceptible to damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the core layer is designed with high strength in the belt longitudinal direction to bear tension, then the conveyor belt can properly bear the tension when mounted in a tensioned state, but the strength in the belt width direction becomes too low to prevent disarray of the fabric, causing longitudinal tearing when objects are fed from significant height or with large weight
Solution Approach 1:
The patent changes the strength parameter distribution within the core layer by specifying that the strength in the belt width direction should be 10% to 50% of the strength in the belt longitudinal direction. This optimized parameter ratio prevents both disarray of fabric and longitudinal tearing, resolving the contradiction between bearing tension and resisting impact damage.
Solution Approach 2:
The core layer uses a composite fabric structure with warp threads and weft threads having different strength characteristics. The weft threads are specifically designed with strength in the 10%-50% range relative to warp threads, creating a composite material that balances tension-bearing capability with impact resistance.
2Reliability
If the strength of the core layer in the belt width direction is increased to prevent longitudinal tearing, then the service life of the conveyor belt is extended, but the balance between longitudinal and lateral strength is altered
Solution Approach 1:
The patent establishes a specific parameter range (10%-50% ratio of width direction strength to longitudinal strength) that optimizes both service life and strength balance. This controlled parameter change ensures the core layer resists longitudinal tearing while maintaining proper tension-bearing characteristics.
Data Source
AI summary
A conveyor belt includes core layers made of fabric disposed between an upper cover rubber and a lower cover rubber. At least one core layer has a strength in the belt width direction ranging from 30% to 70% of a strength in the belt longitudinal direction.