Power Transmission Belt Textile Weft Construction
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Solution Overview
Problem
Existing power transmission belts lack optimal temperature, chemical, and oil resistance, which limits their service life and durability.
Innovation Solution
The power transmission belt features a textile material with a core elastic thread and two additional twisted yarns, where one yarn is wound directly onto the core and the other in the opposite direction, combined with a coating based on acrylate, to enhance media resistance and temperature resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a textile covering with conventional weft construction is used, then the belt achieves basic temperature and chemical resistance, but the oil resistance and service life are insufficient
Solution Approach 1:
The patent applies composite materials by combining multiple yarn types (core yarn, first wrapped yarn, second wrapped yarn) with different properties in a single weft construction. The core yarn provides elasticity, the first wrapped yarn (e.g., aramid) provides heat resistance, and the second wrapped yarn (e.g., polyamide) provides oil resistance, creating a synergistic composite structure that simultaneously addresses multiple resistance requirements.
Solution Approach 2:
The patent implements the nesting principle through the multi-layer yarn construction where the first wrapped yarn is wound around the core yarn, and the second wrapped yarn is wound around the first wrapped yarn. This nested configuration allows each layer to contribute its specific protective properties while maintaining structural integrity and flexibility.
2Temperature
If the weft is constructed with simple single yarn or single wrapping, then the manufacturing is simpler, but the temperature and chemical resistance are insufficient
Solution Approach 1:
The patent uses composite materials by integrating multiple yarn types with complementary properties into the weft construction. The core yarn provides elastic properties, while the first wrapped yarn (such as aramid) provides exceptional heat resistance, and the second wrapped yarn provides chemical resistance, achieving superior temperature resistance through material composition rather than structural complexity alone.
3Object-affected harmful factors
If a coating based on acrylate is applied, then the oil and chemical resistance is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition and crosslinking density of the acrylate coating to optimize its resistance properties. By adjusting the coating formulation and curing parameters, the patent achieves enhanced oil and chemical resistance while maintaining a relatively straightforward application process that can be integrated into existing manufacturing lines.
Data Source
Figure 1~2
Figure 3
AI summary
The belt has a top layer provided as a belt backing and a bottom section with a power transmission zone, where the zone and/or the layer is covered with a textile material e.g. fabric, knit fabric or knotted fabric. The textile material consists of a warp and a weft yarn (30). The weft yarn contains an elastic thread as a core yarn (22) and a wrapped yarn (23) e.g. aramide yarn, and another wrapped yarn (24) e.g. polyamide yarn, where one of the wrapped yarns is directly wound on the core yarn. The other wrapped yarn is wound on the former wrapped yarn in opposite direction.