Fan Blade Axial-Centrifugal Guide Trench Design
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Solution Overview
Problem
Existing fan systems face challenges in achieving improved air volume, wind pressure, and structural strength to meet diverse application needs.
Innovation Solution
The fan design incorporates axial and centrifugal blade portions with a guide trench, winglet structures, and inwardly curved surfaces, along with connecting structures for a ring-shaped assembly, enhancing air flow, pressure, and structural integrity while simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional fan blade design is used, then the structure is simple, but the air volume and wind pressure are insufficient
Solution Approach 1:
The blade is divided into multiple functional portions: an axial blade portion connected to the fan hub, and a centrifugal blade portion extending from the axial blade portion. This segmentation allows each portion to perform its specific function optimally, improving overall air moving capability while maintaining manageable structural complexity
Solution Approach 2:
The blade transitions from a purely axial configuration to a three-dimensional structure combining axial and centrifugal components. The centrifugal blade portion extends radially outward and includes a guide trench, adding spatial dimensionality to the blade design to enhance air compression and guidance capabilities
2Productivity
If conventional fan blade design is used, then the manufacturing is simple, but the air pressure and flow control are insufficient
Solution Approach 1:
The centrifugal blade portion includes a guide trench with varying width - narrower near the centrifugal blade portion and wider as it extends outward. This local variation in geometry optimizes air compression and flow control at different locations, improving air pressure generation while the overall design remains manufacturable using standard molding techniques
3Object-affected harmful factors
If conventional fan blade design is used, then the structure is simple, but the turbulence and noise are high
Solution Approach 1:
The guide trench in the centrifugal blade portion features a curved, smooth profile that gradually varies in width. This curvature design guides air flow smoothly through the blade structure, reducing turbulence and associated noise while the trench can be formed using conventional molding processes
4Ease of operation
If multiple separate components are used for blade assembly, then the assembly is flexible, but the assembly process is complex
Solution Approach 1:
The axial blade portion and centrifugal blade portion are integrated into a single monolithic blade structure rather than separate components. This merging simplifies the assembly process by reducing the number of parts to be assembled while maintaining the functional benefits of both axial and centrifugal blade configurations
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
This design increases air volume and pressure, reduces turbulence and noise, and improves blade strength, resulting in a more efficient and quieter operation with a simpler assembly process.
Implementation Method 1
the blades includes an axial blade portion having an axial arc surface, which can improve the air volume
Implementation Method 2
the axial blade portion is combined with a centrifugal blade portion having a guide trench, so the air flow and air pressure of the fan can be further increased
Implementation Method 3
the guide trench can increase the air compression area and decrease the blade pressure
Implementation Method 4
The winglet structure and the inwardly curved surface on the blade can decrease the turbulence of the blade and decrease the noise of the fan during operation
Data Source
AI summary
A fan includes a fan hub and a plurality of blades. At least one of the blades includes an axial blade portion and a centrifugal blade portion. The axial blade portion has an axial arc surface. The axial arc surface extends between opposite two edges of the at least one blade, and connects with one of the two edges. The centrifugal blade portion has a guide trench. The guide trench extends away from the centrifugal blade portion. A width of the guide trench increases as it extends away from the centrifugal blade portion.