Heat Pipe Array Filling and Laser Sealing for Mass Production
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Solution Overview
Problem
Current heat pipe manufacturing systems are inadequate for mass production of alkali metal heat pipe arrays, requiring skilled operators and being unsuitable for automated industrial fill processes, especially for high purity alkali metal working fluids like sodium.
Innovation Solution
A fill tool system capable of rapidly, reliably, and inexpensively filling and sealing arrays of heat pipes with a high purity alkali metal working fluid, designed for mass production, featuring a rotatable flange system, working fluid process assembly, heat pipe closure system, laser weld sealing operation, and weld inspection system to handle up to 1000 heat pipes in a single array.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a general-purpose alkali metal fill system is used to fill individual heat pipes, then high purity alkali metal working fluid can be filled, but the production rate is limited to only a few heat pipes per day and skilled operators are required
Solution Approach 1:
The system segments the heat pipe array into individual addressable positions and uses a robotic manipulator with precise positioning to access each position sequentially. The array is divided into multiple heat pipes that can be filled in sequence rather than requiring simultaneous manual operation, enabling automation while maintaining high purity filling standards.
Solution Approach 2:
Manual mechanical operations by skilled operators are replaced with an automated robotic manipulator system controlled by a computer. The robotic system uses automated positioning, gripping, and filling operations to eliminate the need for skilled manual operation while dramatically increasing production rate to arrays of 100-1000 heat pipes per day.
2Productivity
If manual filling methods are used for heat pipe arrays, then high purity alkali metal working fluid can be maintained, but the process is time-consuming and unsuitable for mass production
Solution Approach 1:
The system performs preliminary preparation by loading the entire heat pipe array into the vacuum chamber before the filling process begins. The robotic manipulator is pre-programmed with the array configuration and filling parameters. The vacuum environment is established in advance, and all filling operations are executed sequentially without interruption, dramatically reducing total filling time while maintaining high purity standards.
Solution Approach 2:
The filling process operates continuously once initiated, with the robotic manipulator moving systematically through each heat pipe position without interruption. The system maintains continuous operation within the vacuum environment, filling heat pipes in sequence without breaking the vacuum or requiring re-entry, thereby minimizing time loss and enabling mass production of heat pipe arrays.
3Productivity
If automated industrial fill systems are implemented, then production rate increases, but the system complexity and cost increase
Solution Approach 1:
The robotic manipulator system is designed with universal capabilities to handle different heat pipe array configurations, sizes, and types. The same basic system can be reprogrammed and reconfigured to fill various array geometries and heat pipe specifications, reducing overall system complexity compared to having dedicated systems for each configuration. The system performs multiple functions including positioning, gripping, filling, and sealing operations.
Solution Approach 2:
The system achieves adaptability to different heat pipe arrays by changing operational parameters such as positioning coordinates, filling rates, vacuum levels, and sealing parameters rather than requiring physical reconfiguration of the entire system. This parameter-based adaptability reduces mechanical complexity while maintaining high productivity for mass production.
4Productivity
If rapid filling of large heat pipe arrays is achieved, then productivity increases, but ensuring high purity and quality control becomes more difficult
Solution Approach 1:
The system incorporates feedback mechanisms including vacuum level monitoring, filling quantity control, and quality inspection systems that operate throughout the rapid filling process. Sensors monitor the vacuum environment to ensure contamination-free conditions, track the amount of working fluid filled in each heat pipe, and detect any defects. This real-time feedback enables rapid filling while maintaining high purity and quality standards across all 100-1000 heat pipes in the array.
Solution Approach 2:
The entire filling process takes place within a maintained vacuum or inert gas atmosphere to prevent contamination of the high purity alkali metal working fluid. The vacuum chamber provides a controlled environment that isolates the rapid filling process from atmospheric contaminants, ensuring that even when filling large arrays quickly, the purity requirements are met through the protective inert environment.
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
Enables rapid and cost-effective filling and sealing of heat pipe arrays, allowing for mass production with minimal operator expertise, ensuring high purity and quality through precise fluid dispensing and helium leak detection.
Implementation Method 1
laser weld sealing operation
Implementation Method 2
precise fluid dispensing
Implementation Method 3
helium leak detection
Data Source
AI summary
A fill tool system that fills, seals, and inspects a heat pipe array, which includes one or more heat pipes with heat pipe working fluid.