Endless Belt Coating With Hard Particles for Road Surface Simulation
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Solution Overview
Problem
Existing endless belts for vehicle test benches and wind tunnels suffer from coatings that crack under continuous stress and fail to accurately replicate real road conditions, leading to detachment and inadequate simulation.
Innovation Solution
A method involving a coating with an average roughness and structure mimicking road surfaces, applied directly to a metal core, using a solvent-based polymer matrix with embedded hard particles for enhanced durability and adhesion, and a seamless design to withstand continuous loads and small bending radii.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a coating is applied to the belt surface to simulate road conditions, then the simulation accuracy is improved, but the coating cracks and detaches under continuous stress
Solution Approach 1:
The patent changes the physical and chemical parameters of the coating system by using a two-component polyurethane system with specific isocyanate index (80-120) and controlled crosslinking density. The coating formulation includes specific ratios of polyol, isocyanate, and additives to achieve optimal balance between flexibility and adhesion, preventing cracking while maintaining road simulation accuracy
Solution Approach 2:
The patent creates a composite coating system comprising polyurethane base resin, crosslinking agents, fillers (such as sand or ceramic particles for road texture), and adhesion promoters. This composite structure provides both the mechanical durability needed to prevent detachment and the surface properties required for accurate road condition simulation
2Reliability
If the coating is made more durable to withstand continuous loads, then the reliability is improved, but the flexibility to accommodate bending radii is reduced
Solution Approach 1:
The patent adjusts the polymer chain structure by selecting polyols with specific molecular weights and flexibility characteristics. The isocyanate index is controlled within 80-120 to ensure sufficient crosslinking for durability while maintaining chain mobility for flexibility. Plasticizers and flexible extenders are incorporated to prevent brittleness during bending operations
3Reliability
If a complex multi-layer coating system is used to improve adhesion and durability, then the coating reliability is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent combines multiple functional components (adhesion promoter, polyurethane resin, crosslinking agent, fillers, and flexibilizers) into a single two-component coating system. This integrated formulation eliminates the need for separate application of multiple specialized layers, reducing manufacturing complexity while maintaining comprehensive performance benefits of adhesion, durability, and flexibility
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 provides a durable coating that adheres well to the belt core, simulates real road conditions, and protects against impact, corrosion, and shear forces, ensuring effective simulation and longevity.
Implementation Method 1
The base material forming the matrix for the hard particles can be solvent-based; for example, a hydrocarbon mixture can be used as the solvent. After the solvent evaporates, the majority of the matrix consists of polymers.
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a method for producing a continuous belt (1) and to a continuous belt (1) with a belt body (2) which has a first main surface (3) and a second main surface (4). The first main surface (3) and the second main surface (4) of the belt body are connected together via lateral edges (5, 6), wherein a coating (7) is applied onto the first main surface (3) of the belt body (2), said first main surface lying opposite the inner face of the continuous belt (1) when the continuous belt (1) is completed, and the coating (7) forms the exterior of the continuous belt (1) in the completed state. A matrix which consists of at least one base material (8) and into which hard particles (9) are integrated, in particular particles with a Vickers hardness of over 500 [HV], preferably between 1400 [HV] and 10060 [HV], is applied onto the first main surface (3) of the belt body (2) as the coating (7), said coating (6) being applied preferably directly onto the first main surface (3) of the belt body (2).