Fan Frame Composite Metal Plastic Vibration Control
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Solution Overview
Problem
Conventional fan frames made of single plastic materials induce resonance and vibration at increased rotation speeds, leading to noise and unstable operation, which can damage electronic devices and reduce their performance and lifetime.
Innovation Solution
A fan frame constructed with a combination of metal and plastic materials, where static blades and other portions are designed to disperse vibrations by utilizing different material properties, preventing resonance and reducing noise through integral formation and varying heights and connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the fan rotation speed is increased to enhance heat dissipation efficiency, then the heat dissipation performance is improved, but the fan generates obvious vibration and noise due to resonance in the single plastic material frame
Solution Approach 1:
The fan frame is constructed using composite materials consisting of a plastic base frame and a metal reinforcement frame. The metal frame (made of aluminum alloy, stainless steel, or copper alloy) is integrated with the plastic frame through embedding, coating, or injection molding. This composite structure increases overall stiffness and changes the natural frequency of the frame, thereby avoiding resonance at high rotation speeds and reducing vibration and noise while maintaining heat dissipation efficiency.
2Use of energy by moving object
If the fan rotation speed is increased to enhance heat dissipation efficiency, then the heat dissipation performance is improved, but the fan operation becomes unstable due to resonance in the single plastic material frame
Solution Approach 1:
The metal reinforcement frame integrated with the plastic base frame creates a composite structure with enhanced mechanical strength and stiffness. This composite construction raises the natural frequency of the fan frame away from the operating frequency at high rotation speeds, preventing resonance and ensuring stable operation. The metal components provide structural support that maintains operational reliability even at increased rotation speeds.
3Ease of manufacture
If a single plastic material is used for the fan frame, then the manufacturing process is simple and cost-effective, but the frame induces resonance and amplifies vibration at increased rotation speeds
Solution Approach 1:
The patent employs composite materials where a metal frame (aluminum alloy, stainless steel, or copper alloy) is integrated with a plastic frame through various manufacturing techniques including embedding metal profiles in plastic, coating metal surfaces with plastic, or injection molding plastic over metal substrates. These manufacturing methods, while slightly more complex than single-material construction, remain cost-effective and produce a frame structure that avoids resonance and vibration amplification at high rotation speeds by changing the natural frequency through the composite construction.
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 fan frame operates stably, reduces noise, extends the fan's lifetime, and maintains performance by dispersing vibrations, while allowing for integrated manufacturing and cost-effective production.
Implementation Method 1
the fan frame, which is made of the single plastic material, can induce the resonance effect to concentrate and amplify the vibration source
Implementation Method 2
the fan frame, which is made of the single plastic material, can induce the resonance effect to concentrate and amplify the vibration source
Data Source
AI summary
A fan frame includes a metal base and a frame body. The metal base has a center portion, a plurality of supporting portions with strip shapes and a plurality of wing portions. Each of the supporting portions has a head end, a middle part and a tail end. The head end connects to a peripheral part of the center portion. The wing portions extend outwardly at an angle from the middle parts of the supporting portions, respectively. The frame body has a frame wall. The wing portions are partially at least covered by the frame body. Another fan frame is also disclosed.