J-Shaped Fan Support Frame for Low-Vibration Heat Exchangers
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Solution Overview
Problem
Existing supporting frames for fans in heat exchangers are inadequate for accommodating more powerful fans, leading to increased weight, vibrations, and reduced efficiency, especially in mobile applications.
Innovation Solution
A supporting frame with J-shaped legs of varying heights and a rubber tube retainer for electrical wires, which enhances mechanical stability, reduces weight, and minimizes vibrations and noise while improving aerodynamic properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If traditional tube-based supporting frames are used, then structural strength is sufficient, but weight increases and mechanical stability decreases
Solution Approach 1:
The supporting frame is divided into multiple legs (at least three) that are spaced apart over the circumference, with each leg having a J-shaped cross-section. This segmentation allows the frame to achieve structural strength through distributed support while reducing overall weight compared to a solid tube-based construction.
Solution Approach 2:
The J-shaped cross-section of the legs introduces asymmetry with walls of different heights (first wall height H1 and second wall height H2, where H2 is 20-80% of H1). This asymmetric design optimizes both weight reduction and mechanical stability by strategically placing material where it provides maximum structural benefit while minimizing weight.
2Power
If more powerful fans are installed to meet increasing heat exchanger demands, then heat exchange capacity improves, but weight and vibrations increase
Solution Approach 1:
The segmented leg structure with J-shaped cross-sections provides efficient weight distribution that can support more powerful fans. The multiple legs spaced around the circumference create a stable platform that handles the increased weight and power requirements while maintaining overall assembly weight efficiency.
Solution Approach 2:
By changing the geometric parameters of the leg cross-section (J-shape with specific wall height ratios of 20-80%), the structure achieves optimal strength-to-weight ratio that enables support for higher power fans without proportionally increasing overall assembly weight.
3Object-affected harmful factors
If traditional supporting frames are used, then structural simplicity is maintained, but vibrations and noise increase
Solution Approach 1:
The J-shaped cross-section with asymmetric wall heights (H2 = 20-80% of H1) creates a structurally optimized form that naturally reduces vibrations and noise. The asymmetric geometry provides better aerodynamic properties and vibration damping without requiring complex additional components or systems.
Solution Approach 2:
The J-shaped cross-section incorporates curved geometry that improves aerodynamic properties and reduces turbulence-related vibrations and noise. The curved form factor of the J-shape is more aerodynamic than straight-edged alternatives, reducing harmful airflow interactions.
4Productivity
If heavier supporting frames are used, then structural strength is sufficient, but aerodynamic properties and efficiency decrease
Solution Approach 1:
The segmented leg structure with J-shaped cross-sections achieves structural strength through intelligent material distribution rather than sheer mass. This segmentation allows air to flow more efficiently around the frame compared to solid tube constructions, improving aerodynamic properties and overall system efficiency.
Solution Approach 2:
The supporting frame can be made from plastic or sheet metal materials that provide high strength-to-weight ratios. The J-shaped cross-section geometry works synergistically with these materials to achieve both structural adequacy and weight reduction, improving aerodynamic efficiency.
Data Source
AI summary
A supporting frame for a fan for a heat exchanger is provided.The supporting frame (1) has at least three legs, wherein at least one of the legs has a J-shaped cross section, in which one of the walls is higher than the other wall.A fan assembly that has such a supporting frame and a heat exchanger that has such a fan assembly is also provided.