Lead-Screw Actuator Assemblies for Tool-Less Cooling Connections
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Solution Overview
Problem
Existing liquid cooling systems in data centers face challenges with maintaining leak-free fluid connections and tool-less insertion/removal of components, particularly due to hydraulic pressures that can cause disconnection of modular components.
Innovation Solution
The implementation of actuator assemblies with retention mechanisms and blind-mate connection systems that utilize a lead screw, ratchet gear, and pawl system to overcome hydraulic pressures, ensuring secure and tool-less engagement of fluid ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If modular components are designed for tool-less insertion/removal, then ease of operation is improved, but reliability deteriorates due to hydraulic pressures causing disconnection
Solution Approach 1:
The connection system is divided into separate functional elements: a removable component with fluid couplers, a housing with fixed couplers, a guide structure for alignment, and a retention mechanism for securing. This segmentation allows the component to be easily inserted and removed while the retention mechanism ensures reliable connection under pressure.
Solution Approach 2:
The retention mechanism is designed to counteract the harmful effect of hydraulic pressure before it can cause disconnection. The pawl and ratchet gear configuration creates a mechanical lock that resists the separating force generated by hydraulic pressure, preventing the component from accidentally disconnecting during operation.
2Reliability
If retention mechanisms are added to prevent disconnection, then reliability is improved, but device complexity increases
Solution Approach 1:
The retention mechanism is designed to automatically engage and disengage without requiring external tools or complex control systems. The pawl self-locks when the component is inserted, and the ratchet gear automatically engages with the pawl during insertion while allowing controlled removal when the guide structure aligns the couplers. This self-service design maintains reliability while minimizing complexity.
3Manufacturing precision
If guide structures are implemented for alignment, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The guide structure acts as an intermediary element between the removable component and the housing. It provides a temporary alignment function during insertion, ensuring that the fluid couplers are properly positioned before the retention mechanism engages. The guide structure is simple in design but effective in achieving precise alignment without requiring complex positioning systems.
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 actuator assemblies provide reliable, tool-less connections and maintenance of fluid ports, enhancing the serviceability and reliability of liquid cooling systems by preventing disconnections caused by hydraulic pressures.
Implementation Method 1
a lead screw with a threaded end, where the lead screw can be rotatable about the rotation axis. The manual engagement interface can include a knob, wherein a rotation of the knob can produce a corresponding rotation of the lead screw
Implementation Method 2
The retention mechanism can comprise a ratchet gear secured to the lead screw and positioned within the housing, and a pawl movable between an engaged configuration and a disengaged configuration. The pawl can be in contact with the ratchet gear in the engaged configuration
Data Source
AI summary
A blind-mate connection system for fluid ports of a liquid cooling system can include a housing defining a fluid inlet and a fluid outlet. An inlet fluid coupler can be in fluid communication with the fluid inlet, and an outlet fluid coupler can be in fluid communication with the fluid outlet. The inlet and outlet fluid couplers can face in a first direction and allow fluid flow parallel to a first axis. A guide structure can constrain housing movement transverse to the first axis. The system can include a manual engagement interface rotatable about a rotation axis, where rotation in a first direction produces linear translation of the housing in an insertion direction parallel to the first axis. A retention mechanism can oppose rotation of the manual engagement interface in a direction opposite the first direction.