碩士 / 國立虎尾科技大學 / 創意工程與精密科技研究所 / 99 / Grooved-fin heat pipe are widely used in notebook computers, electrical, aerospace, heat exchangers, cooling device, the natural reference facilities of the geothermal heat or heat application. The working principle is use of the evaporator, condenser end, the capillary structure, working fluid for a closed system consisting of thermal cycling. Therefore, the structure forming the capillary grooves- fin heat pipe for the core problem.
However, use the finite element simulation of the grooves-fin heat pipe simulation, the grid elements to make a smooth filling in the tiny alveolar, the facility occur mesh count is too much, time-consuming issues such as simulation, in this study using the finite element simulation of the way through the localization, to have substantially reduced the time required for simulation, but there would be material in the local simulated rollover or break away from the mandrel, and then after the friction ring by joining the successful completion of simulation.
This study of different spinning parameters, include the spinning depth, tube thickness and ball diameter of the process, and the following conclusions：
(1)Through different parameters simulation results show that, the spinning depth and tube thickness of the tooth is filled with the most important parameters, when the thicker wall is needed is the greater amount spinning depth, spinning depth they need tube thickness about of 60-80%.
(2)When the tube thickness and spinning depth is large, and thus prone to defects resulting build up aside from the effects of appearance, and ball diameter is also the main parameters affecting build up, build up when the ball diameter, the smaller the height of the more high.
(3)When the amount of spinning enough to make under the pressure pipe completely filled tooth under the pressure continued to increase when the amount of pipe build up the situation will be slightly increased, whereas when the tooth is not completely filled when the bulge height is lower.
(4)Ball diameter for tooth filling has little effect, but for tube build up and radial load ball has a greater influence when the ball diameter, the greater the build up height was lower, but the ball slightly radial load will increase.
(5)According to the simulation results, we recommend the use of larger ball diameter and thinner wall thickness for production, this configuration avoids excessive pressure arising under the build up, and reduce the wall thickness can be reduced material deformation zone, and thus a significant reduction in ball are subject to radial load.
| Identifer | oai:union.ndltd.org:TW/099NYPI5785008 |
| Date | January 2011 |
| Creators | Shi-Jie Chang, 張仕傑 |
| Contributors | 許源泉 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 68 |
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