Thin Fan Compression-Resistant Pillar Structural Integrity
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Solution Overview
Problem
Thin fans in electronic devices face structural weakness due to limited space, leading to deformation and interference with the rotor structure, which can cause damage and reduce their lifetime, and existing solutions complicate manufacturing and assembly while limiting heat dissipation efficiency.
Innovation Solution
A thin fan design incorporating a compression-resistant pillar as the axis of the rotor structure, which is taller than the rotor itself, to resist external deformation and protect the shaft, integrated with the bushing and made from materials like steel, copper, or ceramics, allowing for reduced assembly steps and manufacturing costs without interfering with airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the fan is made thinner to fit compact electronic devices, then the heat dissipation device becomes more compact and adaptable, but the structural strength becomes weaker and the frame shell is easily deformed
Solution Approach 1:
The fan structure is segmented into functional components: the frame shell for housing, the rotor structure for rotation, and the compression-resistant pillar for structural support. This segmentation allows each component to be optimized independently, enabling the fan to be made thinner while maintaining structural strength through the dedicated pillar component.
Solution Approach 2:
The compression-resistant pillar acts as an intermediary element between the frame shell and the rotor structure. It mediates the mechanical stresses, preventing deformation of the frame shell from being transmitted to the rotor, thus maintaining structural integrity in a thin design.
2Reliability
If a static fixing axis is firmly connected to the external structure to resist deformation, then the rotor structure is protected from compression, but the assembling gap becomes very small and assembling flexibility is decreased
Solution Approach 1:
The compression-resistant pillar is extracted from the frame shell as a separate, removable component. This allows the pillar to be installed only when needed for protection, maintaining assembling flexibility while providing rotor protection when required. The pillar can be taken out or adjusted without affecting the entire fan assembly.
Solution Approach 2:
The compression-resistant pillar is designed with dynamic positioning capability, allowing it to be adjusted to different heights or positions during assembly. This dynamic adjustment enables optimal protection of the rotor while maintaining adequate assembling gaps and flexibility for different device configurations.
3Reliability
If additional restriction and connection structures are added to fix the oil bearing, then the rotor-impeller assembly is protected from deformation, but the structure becomes more complex and manufacturing processes are complicated
Solution Approach 1:
The compression-resistant pillar is merged with the bearing support structure, combining the functions of structural support, bearing fixation, and rotor protection into a single integrated component. This reduces the number of separate parts and simplifies the overall structure while maintaining protection of the rotor-impeller assembly.
Solution Approach 2:
The compression-resistant pillar serves multiple functions simultaneously: it provides structural support to resist deformation, fixes the bearing in position, protects the rotor from compression, and maintains proper spacing. This multi-functionality eliminates the need for separate restriction and connection structures, reducing complexity.
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 compression-resistant pillar effectively prevents deformation and maintains rotor operation, reducing wear and tear, simplifying assembly, and enhancing heat dissipation while maintaining the fan's structural integrity and longevity.
Implementation Method 1
the compression-resistant pillar is connected to the bushing. The rotor structure is disposed corresponding to the stator structure. The compression-resistant pillar is an axis of the rotor structure and is not rotated along with the rotor structure
Implementation Method 2
The rotor structure includes a hollow-cylindrical shaft, a rotor shell, a magnetic structure and an impeller. The stator pole group magnetically drives the magnetic structure as well as the rotor shell and the shaft to rotate
Data Source
AI summary
A thin fan includes a frame and a driving device. The fan frame includes a base and a frame shell. The driving device includes a stator structure and a rotor structure disposed corresponding to the stator structure. The stator structure includes a stator pole group, a bushing, a bearing and a compression-resistant pillar. The rotor structure includes a hollow-cylindrical shaft, a rotor shell, a magnetic structure and an impeller. The shaft is mounted on the outer periphery of the compression-resistant pillar and is disposed between the compression-resistant pillar and the bearing. The rotor shell is connected to the shaft. The magnetic structure is disposed on the inner wall of the rotor shell, and the impeller is connected to the rotor shell. The maximum height of the rotor structure is lower than the height of the compression-resistant pillar when the rotor structure is connected to the stator structure.