Damping Assemblies for Remote Heat Sink Vibration Isolation
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Solution Overview
Problem
In data centers, the remote heat sink, which provides additional cooling, can cause rocking or lateral movement of the first heat sink due to shock and vibration loads, leading to instability and potential damage to semiconductor chip packages and electrical connections, especially in 1U chassis where height limitations prevent stacking and require remote heat sinks to be spaced apart.
Innovation Solution
The implementation of damping assemblies, including flexible placement of dampers relative to the remote heat sink, allows for vibration mitigation in multiple directions while allowing the remote heat sink to float or move within the chassis, reducing the risk of damage and misalignment by using materials like silicone or rubber supported by mechanical retainers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the remote heat sink is spaced apart from the first heat sink in the chassis, then additional cooling is provided, but the remote heat sink causes rocking or lateral movement of the first heat sink due to shock and vibration loads
Solution Approach 1:
A damping assembly is introduced as an intermediary element between the remote heat sink and the chassis. This damping assembly includes a damper (such as a vibration isolator or shock absorber) that mediates the transmission of shock and vibration loads from the remote heat sink to the chassis, preventing the remote heat sink from causing rocking or lateral movement of the first heat sink while still allowing the remote heat sink to be spaced apart for additional cooling
2Stability of the object's composition
If the remote heat sink is rigidly coupled to the chassis, then stability is improved, but vibration and shock loads cause rocking or lateral movement of the first heat sink
Solution Approach 1:
The damping assembly serves as a mediator that allows the remote heat sink to be coupled to the chassis in a controlled manner. The damper provides a compliant connection that isolates the chassis from vibration and shock loads generated by the remote heat sink, preventing these harmful factors from causing rocking or lateral movement of the first heat sink while maintaining overall stability
3Object-affected harmful factors
If damping material is placed between the remote heat sink and the chassis, then vibration impact is reduced, but the remote heat sink may move or shift position
Solution Approach 1:
The damping assembly acts as an intermediary that balances vibration isolation with position control. The damper reduces the transmission of vibration impacts from the remote heat sink to the chassis, while the assembly's structural design (including mounting features and constraints) prevents the remote heat sink from moving or shifting position excessively, thereby maintaining manufacturing precision requirements
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
This solution effectively reduces the impact of vibrations on heat sinks and associated electronic components, preventing scratching, cracking, and electrical discontinuities, while maintaining the remote heat sink's ability to float and provide additional cooling, thus enhancing the stability and reliability of the LGA assembly.
Implementation Method 1
damping material proximate to the second heat sink
Implementation Method 2
damping material proximate to the second heat sink
Data Source
AI summary
Damping assemblies for heat sinks and related methods are disclosed. An example apparatus includes a chassis; a first heat sink associated with an electronic component in the chassis; a second heat sink coupled to the first heat sink, the second heat sink spaced apart from the first heat sink in the chassis; and damping material proximate to the second heat sink.