This paper systematically studies the theory and hydraulic design of the non - overload sewage pump , the research work and its results are mainly following : 1 本文對(duì)無(wú)過(guò)載排污泵理論與水力設(shè)計(jì)方法進(jìn)行了較為系統(tǒng)的研究,主要工作及研究成果有: 1
The paper also puts forward the design method of the non - overload sewage pump . certain parameters should be selected to make sure that the maximum brake horsepower occurs near the design point 給出了無(wú)過(guò)載排污泵的設(shè)計(jì)方法,實(shí)例驗(yàn)證表明所給設(shè)計(jì)方法是正確的,科學(xué)的和有效的。
In present thesis , the actual design theories and methods for super - low specific - speed pump are introduced first , including " the increased flowrate design method " , " the method of anti - hump on h ~ q characteristic curve " , " non - overload design method " , " the design method of complex impeller " and so on . according to these methods , 5 types of impeller have been designed 論文首先對(duì)極低比轉(zhuǎn)數(shù)離心泵的現(xiàn)行設(shè)計(jì)理論和設(shè)計(jì)方法作了介紹,包括加大流量設(shè)計(jì)法、減小或消除揚(yáng)程曲線駝峰的途徑、無(wú)過(guò)載設(shè)計(jì)及復(fù)合葉輪設(shè)計(jì)法等,并按照這些方法設(shè)計(jì)了五種葉輪。
Under the premise of ensuring the pump ' s normal performance , and its non - overload characteristics and aimed at lowering the maximum brake horsepower , , the author also analysis the problem resulted from the saturation brake horsepower of the low specific speed sewage pumps and the solution to it . 3 推導(dǎo)了排污泵飽和軸功率特性產(chǎn)生的理論條件,導(dǎo)出了無(wú)過(guò)載排污泵設(shè)計(jì)的基本方程,在保證泵性能要求的前提下,同時(shí)實(shí)現(xiàn)無(wú)過(guò)載要求,討論了低比速排污泵設(shè)計(jì)中存在的問(wèn)題及解決的途徑。