潛水用呼吸調節器之分析與改良

Abstract

自備呼吸器的水中呼吸裝置，也就是俗稱的水肺潛水設備，主要由高壓空氣桶、以及壓力調節器組成。目前的呼吸調節器作動與效能在設計上欠缺一種能夠作為改良依據理論基礎，設計時只能依靠傳統的經驗法則，以及試誤法反覆的實驗以期得到較佳的結果。 本實驗將利用動態機構(MSC Adams)與模流分析軟體(FLOW-3D)，模擬呼吸調節器在使用時內部氣流場的壓力、流速等分佈。並藉由改變調節器性能的關鍵參數，分析對於調節器性能的影響。相較於傳統上，設計新產品時必須建立出實體模型，透過試驗機台才能了解其效果的方法，而透過本研究所建立的模擬預測方法可以預先了解調節器性能，並有效的縮短產品開發時間。除此之外藉由模擬軟體得到的理論數據，來快速的改良呼吸調節器，已達到更好的性能。

The self contained underwater breathing apparatus - SCUBA set ,consist of compressed air tank and pressure regulator .The development of scuba diving nowadays is based on the invention of regulator. The pressure of compressed air carried by diver must be reduced to the pressure as in environment by regulator before he or she can breath in.If the regulator fail in the water or it can’t supply the enough air for diver, the lives of diver would be in serious danger .So the performance and stability of the regulator concern the life of divers .Until nowadays, the design of regulator is depend on the experiences of the designers .Try-and-error is required to get the better results. In this project, using the Mold-Flow Analysis Software- FLOW-3D, simulation of the air flow in the regulator will be used and analyses of the key factors influence the performance of the regulator will be idenfied. Besides, we can predict the index performance of regulator by using the analysis result. Contrary to the tradition process, the performance can be predicted bfore a proto-type is made for experiment when design a new regulator. Therefore, the simulation process by using of FLOW-3D can effectively reduce the time of develop products. In addition, utilize the results of simulation to improve the regulator for a better performance.