本研究主要以離心泵為研究對象,採用速度係數法先求出葉輪的基本幾何形狀、出口速度以及泵之效率,再將這些泵資料匯入VBA(Visual Basic for Application),並透過AutoCAD ActiveX Objects將計算出來的離心泵幾何資訊導入AutoCAD繪出葉輪之軸面圖,並做一系列的內切圓求出葉輪流道的幾何中心線、流道中線以及過水斷面形成線,再使用保角變換方格網法來近似葉片的形狀,並且在軸面圖上繪製出葉片的厚度,有了上述的泵資料,就可以繪製葉片的平面圖,也就是葉片剪裁圖,最後可以將這些資料利用AutoCAD ActiveX Objects全部輸出至Excel,再將這些資料使用三維造型軟體來繪型,就可以得到泵實體。 吾人開發比轉速(n_s)介於70~300之離心式泵,且有不同葉輪大小之離心泵。未來可新增離心雙吸泵以及離心多級泵之水力設計方法,增加本程式於工程上之可用性。
In this study we mainly research in centrifugal pump, we used speed coefficient method to find basic geometry of the impeller and speed of impeller outlet and the pump's efficiency, then we import these pumps data to VBA (Visual Basic for Application), the pump geometries will be drawn in AutoCAD by AutoCAD ActiveX Objects, then we can draw blades floor plan. Finally, export pump's information and construct pump's solid. We have developed centrifugal pump which specific speed(n_s) is between 70 to 300 and different sizes of the centrifugal pump. In the future you can add hydraulic design methods of double suction centrifugal pumps and centrifugal multistage pump, increase the availability of the program in the works.