Fan Isolation System Using Thermal Duct for Vibration and Sealing
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Solution Overview
Problem
Existing fan suspension systems in information handling systems face challenges in minimizing vibration transmission, which can degrade component performance, and current solutions like grommets are costly and limited by vertical space constraints, while also requiring additional features for effective vibration isolation and thermal sealing.
Innovation Solution
A fan isolation system using a thermoplastic resin, such as Mylar, to form a thermal duct that minimizes air gaps and incorporates a damping portion with isolation spring elements and thermal sealing flaps to reduce vibration and ensure mechanical stability, integrated within a fan module for various server types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If grommets are used to isolate fan vibration, then vibration transmission is reduced, but vertical space is consumed and cost increases
Solution Approach 1:
The patent uses a thin film damping portion made of flexible material (such as rubber or polymer) that is bonded between the fan carrier and chassis. This flexible film provides vibration isolation through its damping properties while occupying minimal vertical space, unlike bulky grommets. The film's flexibility allows it to deform and absorb vibration energy effectively.
Solution Approach 2:
The damping portion is constructed from composite materials that combine vibration-damping properties with thin-profile characteristics. By using specialized damping materials with high loss factors, the patent achieves effective vibration isolation in a thin configuration, resolving the contradiction between vibration reduction and space consumption.
2Object-affected harmful factors
If grommets are used to isolate fan vibration, then vibration transmission is reduced, but manufacturing cost increases
Solution Approach 1:
The patent combines multiple functions into a single integrated damping portion that provides both vibration isolation and thermal sealing. By merging the vibration damping function with the thermal seal function into one component, the patent eliminates the need for separate grommets and sealing elements, thereby reducing part count, assembly complexity, and manufacturing cost while maintaining vibration isolation effectiveness.
Solution Approach 2:
The damping portion is designed as a multi-functional component that simultaneously provides vibration isolation, thermal sealing, and mechanical retention. This universal component replaces multiple specialized parts (vibration grommets, thermal seals, retention clips), simplifying the overall assembly and reducing manufacturing costs through economies of scale and reduced assembly operations.
3Device complexity
If fan is mounted directly to chassis, then assembly is simple, but vibration degrades component performance
Solution Approach 1:
The damping portion is pre-bonded to the fan carrier during fan assembly, creating a pre-assembled vibration-isolated unit. This preliminary action of bonding the damping layer to the carrier before final installation simplifies the overall assembly process, as the vibration isolation function is already integrated and requires no additional installation steps during system assembly.
4Object-affected harmful factors
If thermal sealing is provided separately from vibration isolation, then thermal airflow is sealed, but device complexity increases
Solution Approach 1:
The damping portion is designed to simultaneously provide both thermal sealing and vibration isolation functions. By combining these two functions into a single integrated component, the patent eliminates the need for separate thermal seals and vibration isolators, thereby reducing device complexity while ensuring both thermal airflow containment and vibration protection.
Solution Approach 2:
The damping portion serves as a universal component that performs multiple functions: vibration isolation through damping, thermal sealing through its conformal fit and sealing properties, and mechanical retention. This multi-functionality reduces the overall device complexity by eliminating the need for multiple specialized components.
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 isolation system effectively reduces vibration transmission by up to 80% and integrates thermal sealing, offering a cost-effective and space-efficient solution that resists mechanical shock and air pressure differentials, while simplifying assembly and reducing the risk of damage.
Implementation Method 1
a damping portion at the interface between the fan carrier and the chassis to provide additional vibration reduction across the full frequency range
Implementation Method 2
isolation spring elements
Data Source
AI summary
A fan isolation system comprising: a fan isolation assembly attached to a fan, the fan isolation assembly comprising a mechanical isolation portion, the mechanical isolation portion comprising an isolation spring element, the mechanical isolation portion performing a vibration isolation function for the fan isolation assembly; and, a thermal duct portion, the thermal duct portion being configured to fit within the mechanical isolation portion, the thermal duct portion performing a thermal sealing function for the fan isolation assembly.