Fan Frame Buffer Structure for Impeller Vibration Isolation
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Solution Overview
Problem
The excessive vibration generated by the rotation of a fan impeller in electronic devices leads to noise and instability in other electronic components, as it is transmitted through the fan frame.
Innovation Solution
A fan device and fan frame design that incorporates a buffer with a higher elastic coefficient than the shaft tube, clamped between the shaft tube and the frame, to absorb the vibration before it is transmitted to the frame, thereby reducing noise and instability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a fan impeller is rotated to dissipate heat from a processor, then heat dissipation performance is improved, but vibration is generated that transmits to the fan frame and other electronic components
Solution Approach 1:
The patent introduces a buffer as an intermediary component between the shaft tube and the fan frame. This buffer absorbs and attenuates the vibration generated by the rotating impeller before it can transmit to the fan frame and other electronic components, thereby resolving the contradiction between maintaining heat dissipation performance and reducing harmful vibration.
Solution Approach 2:
The patent converts the harmful vibration energy into beneficial heat energy through the buffer material's internal friction and hysteresis. The buffer absorbs the mechanical vibration energy from the impeller rotation and dissipates it as heat, transforming a harmful effect into an acceptable byproduct while protecting the electronic components.
2Productivity
If the fan impeller rotates at high speed to improve cooling efficiency, then heat dissipation is improved, but noise increases due to vibration transmission
Solution Approach 1:
The buffer serves as a vibration isolation intermediary that decouples the noise transmission path from the high-speed rotating impeller to the fan frame. By absorbing vibrations at the source, the buffer prevents noise generation from vibration transmission, allowing high-speed operation without excessive noise.
3Reliability
If vibration from the fan impeller is reduced by adding damping structures, then stability of electronic components is improved, but device complexity increases
Solution Approach 1:
The buffer is a simple intermediary component that provides vibration damping functionality without requiring complex multi-component assemblies. It is directly installed between the shaft tube and fan frame, maintaining structural simplicity while effectively protecting electronic components from vibration-induced instability.
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
Significantly reduces vibration and noise transmitted to other electronic components, maintaining the stability and operation of these components by effectively absorbing the fan impeller's rotational vibrations.
Implementation Method 1
the buffer with a high elastic coefficient and desired vibration absorption capability is clamped between the shaft tube and the frame, the vibration generated by the rotation of the fan impeller is absorbed by the buffer before being transmitted to the frame
Implementation Method 2
An elastic coefficient of the buffer is larger than an elastic coefficient of the shaft tube
Data Source
AI summary
A fan device includes a fan frame and a fan impeller. The fan frame includes a frame and a shaft seat. The shaft seat includes a shaft tube and a buffer. At least a part of the buffer is clamped between the shaft tube and the frame. The fan impeller is rotably disposed on the shaft tube of the shaft seat. An elastic coefficient of the buffer is larger than an elastic coefficient of the shaft tube.