Liquid Pump Unit Latch Mechanism for Rapid CDU Maintenance
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Solution Overview
Problem
The process of maintaining and replacing CDU pump units in liquid cooling systems is cumbersome and time-consuming, often requiring the entire CDU to be removed from the server rack, increasing the risk of lost parts and extended system downtime due to the complex disassembly process.
Innovation Solution
A liquid pump unit design featuring a chassis with a tray box and latch mechanism that allows secure latching during operation and quick release for maintenance, utilizing a transition fit and latch mechanism for easy removal and installation, reducing the need for excessive fastening and disassembly steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the entire CDU is removed from the server rack to maintain or replace the pump unit, then the pump can be accessed for maintenance, but the system downtime is extended and the complexity of the maintenance process increases
Solution Approach 1:
The CDU is divided into separable modules: the pump unit can be independently removed from the CDU chassis while leaving the rest of the CDU in the server rack. This segmentation allows pump maintenance without complete CDU removal, reducing system downtime and maintenance complexity
Solution Approach 2:
The pump unit is extracted as a separate serviceable component from the CDU assembly. The pump can be removed, maintained, and replaced independently while the CDU remains installed in the server rack, eliminating the need to remove the entire CDU for pump servicing
2Stability of the object's composition
If multiple fasteners and connections are used to secure the pump unit in the CDU, then the pump is securely fixed during operation, but the number of disassembly steps increases and the risk of lost parts increases
Solution Approach 1:
Multiple fastening functions are merged into a single latch mechanism. The latch simultaneously secures the pump unit to the CDU chassis and maintains the sealed connection between couplers, eliminating the need for multiple separate fasteners and reducing disassembly steps
Solution Approach 2:
The latch mechanism performs multiple functions: it mechanically secures the pump unit to the chassis, maintains the sealed connection between inlet/outlet couplers, and provides a single-point release for quick removal. This multi-functionality reduces the number of components and steps required
3Strength
If the pump unit is designed with multiple internal fasteners and connections, then the pump is securely attached to the CDU, but the maintenance process becomes more time-consuming and complex
Solution Approach 1:
The pump assembly is segmented from the CDU chassis as a separate module. This allows the pump to be manufactured and assembled independently, then installed as a complete unit, simplifying both manufacturing and maintenance while maintaining secure connections through the latch mechanism
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
A liquid pump unit includes a chassis with a tray box and a chassis box. The chassis box has a front opening, a back panel, and a bay for receiving the tray box. The back panel includes a chassis-outlet coupler, a chassis-inlet coupler, and at least one chassis-electrical connector. A pump assembly is mounted on the tray box and includes an outlet coupler, an inlet coupler, and at least one electrical connector, each removably connected to corresponding chassis couplers. A latch mechanism having a lever, bar, latch, and catch-pin secures the tray box within the chassis. The latch is rotatable to engage or release the catch-pin, allowing the latch mechanism to lock or release.