Pump Tray Latch Mechanism for Fast CDU Maintenance
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Solution Overview
Problem
The maintenance and replacement of CDU pump units in liquid cooling systems are cumbersome and time-consuming, often requiring the entire CDU to be removed from the server rack, leading to increased risk of lost parts and extended system downtime.
Innovation Solution
A liquid pump unit with a chassis and tray box design, featuring a latch mechanism that allows secure latching during operation and easy release for maintenance, enabling quick insertion and removal without disassembling multiple components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the entire CDU is removed from the server rack for pump maintenance, then the pump can be accessed and serviced, but the system downtime increases and the risk of lost parts increases
Solution Approach 1:
The CDU is divided into separable modules: the pump unit can be independently removed from the CDU housing while leaving the CDU mounted in the server rack. This segmentation allows pump maintenance without removing the entire CDU, reducing system downtime and the risk of lost parts.
Solution Approach 2:
The pump unit is extracted as a separate serviceable component from the CDU assembly. The quick-connect mechanisms allow the pump to be removed and reinstalled without removing the entire CDU from the server rack, enabling maintenance while minimizing system downtime.
2Ease of repair
If multiple fasteners and connections are removed for pump maintenance, then the pump can be accessed, but the number of disassembling steps increases and the risk of lost parts increases
Solution Approach 1:
Multiple connection functions (mechanical fastening, fluid coupling, electrical connection) are merged into integrated quick-connect mechanisms. A single latching action simultaneously secures all connections, and a single release action disconnects all connections, dramatically reducing the number of disassembly steps required.
Solution Approach 2:
The quick-connect mechanism serves multiple functions simultaneously: mechanical attachment, fluid pathway connection, and electrical connection. This multi-functional design eliminates the need for separate fasteners and connection steps for each function.
3Reliability
If the pump unit is securely fastened to the CDU, then the connection is reliable during operation, but the pump cannot be quickly removed for maintenance
Solution Approach 1:
The connection system transitions from a static permanently fastened state to a dynamic quickly reversible state. The latching mechanism provides secure holding during operation but can be rapidly released and repositioned for maintenance, adapting between these two states as needed.
Data Source
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.