When pumping water, the head, shaft power and efficiency of the pump decrease with the reducing in impeller diameter.
输送水时，叶轮切割后，泵的扬程、轴功率、效率都下降。
There is a relationship between the trim exponents and impeller diameter ratio, namely the exponents vary with the ratio.
叶轮切割指数与直径比的确存在着某种关系，也就是切割指数随着切割后的直径比的变化而变化。
This thesis introduces the design of impeller diameter measuring mechanism in robot flexible polishing machine tool on the basis of rack-and-pinion linear diploid mechanism theory.
介绍了根据齿轮齿条直线倍程机构原理设计的机器人柔性抛光机床的轮径检测机构。
Final design scheme is confirmed after economic and technical analyse. Then, axial fan 's stage type, impeller diameter, hub ratio , specific speed and the number of blades are decided.
在进行经济技术性分析后，最终确定风机的设计方案，进而确定通风机适当的级型式、叶轮尺寸、轮毂比、转速和叶片数等基本参数。
Final design scheme is confirmed after economic and technical analyse. Then, axial fan 's stage type, impeller diameter, hub ratio , specific speed and the number of blades are decided.
在进行经济技术性分析后，最终确定风机的设计方案，进而确定通风机适当的级型式、叶轮尺寸、轮毂比、转速和叶片数等基本参数。
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