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制造离心泵叶轮必须有叶片剪裁图,它是制造叶轮叶片模型的依据。叶片剪裁图由测绘实际叶轮得到。叶片剪裁图由轴面投影图和平面投影图(又称木模图)组成。图工为灌注泵和砂泵叶片剪裁图的基本形状,图中β表示叶片的安装角;φ表示叶片的包角。图2为注水泵叶片剪裁图的基本形状。可以看出,图1和图2中的轴面投影图颇为相近,而木模图却相差甚远,测绘时的难易程度也相差很大。下面介绍叶片轴面投影图和木模图的测绘及对测绘图纸的检查方法。
Centrifugal pump impeller manufacturing must have cut the map, it is the basis for the manufacture of impeller blade model. Blades cut from the actual mapping of the impeller. Blade cut map by the axial projection and plane projection map (also known as wood mold) composition. Figure for the perfusion pump and sand pump blade trim the basic shape of the figure, the figure β that the blade mounting angle; φ said the angle of the blade. Figure 2 shows the basic shape of the water pump blade trim. It can be seen that the axial projections in Figure 1 and Figure 2 are quite similar, while the wood patterns are far apart, and the ease of mapping is also quite different. The following describes the blade axial projection and woodworking mapping and mapping of the inspection methods.