Fan Module Ring Frame Curvature Strength Airflow
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Solution Overview
Problem
The structural strength of thin fan blades in smaller, lighter fans is insufficient, leading to potential deformation or breakage, while adding a frame to strengthen them can compromise airflow and fan performance.
Innovation Solution
A ring frame is connected to the outer endpoint of each fan blade, with a curved inner surface and gentler outer surface, enhancing structural strength and promoting airflow by creating a pressure difference between the surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the thickness of fan blades is decreased to make the fan lighter and thinner, then the weight and volume of the fan are reduced, but the structural strength of the fan blades becomes insufficient
Solution Approach 1:
The patent combines thin fan blades with a ring frame structure to create a composite system. The ring frame acts as a reinforcing element that compensates for the reduced strength of thin blades, allowing the fan to maintain both low weight and adequate structural strength.
Solution Approach 2:
The ring frame is designed with a curved surface that has different cambers on its inner and outer surfaces. This curvature design not only strengthens the blade structure but also optimizes airflow patterns, demonstrating how geometric curvature can simultaneously address structural and aerodynamic requirements.
2Strength
If a frame is installed to strengthen the fan blades, then the structural strength of the fan blades is improved, but the airflow is affected and fan performance deteriorates
Solution Approach 1:
The ring frame features a curved surface with specific camber differences between inner and outer surfaces. This curvature is designed to work with airflow patterns, creating a pressure difference that actually enhances fan performance rather than hindering it. The curved geometry allows the frame to strengthen blades while maintaining or improving aerodynamic efficiency.
Solution Approach 2:
The patent optimizes the camber parameters of the ring frame's curved surface to achieve a balance between structural support and airflow promotion. By carefully controlling the curvature parameters, the design ensures that the frame strengthens blades without creating excessive flow resistance.
3Volume of moving object
If the spacing between fan blades is decreased to reduce fan volume, then the volume of the fan is reduced, but the structural strength of the blades becomes insufficient
Solution Approach 1:
The combination of thin, closely-spaced blades with the ring frame reinforcement creates a composite structure that maintains high strength-to-volume ratio. The ring frame provides the necessary structural support that would otherwise require thicker, more widely-spaced blades.
Solution Approach 2:
The curved surface of the ring frame distributes mechanical loads more effectively across the blade assembly, compensating for the reduced spacing and thinner blade profiles. This curvature-induced load distribution allows for compact design without sacrificing structural integrity.
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 strengthens the fan blades, reducing deformation and breakage while maintaining or improving airflow performance by optimizing airflow pressure.
Implementation Method 1
the camber of the inner surface facing the fan blades is larger, and the camber of the outer surface is gentler. This configuration can form a pressure difference between the inner surface facing the fan blades and the opposing outer surface of the ring frame, thereby promoting the airflow
Data Source
AI summary
A fan module includes a hub, a plurality of fan blades, and a ring frame. The hub is configured to rotate about a central axis. The plurality of fan blades surround the hub. Each of the plurality of fan blades includes a first end portion connected to the hub and a second end portion opposite to the first end portion. The ring frame is connected to the second end portion of each of the plurality of fan blades. The ring frame includes a first surface facing the plurality of fan blades and a second surface opposite to the first surface, and the first surface is a curved surface.