| 1. | Experimental research on low specific speed roto - jet pump
低比转数旋喷泵的试验研究 |
| 2. | A new type of very low specific speed pump ? roto - jet pump is presented for low flowrate and high head transportation , which is introduced at the end of the thesis
论文最后主要研究了一种隶属于极低比转数离心泵范畴的新型泵? ?旋喷泵，它是一种新型的石油化工用泵，具有流量小、扬程高、流量扬程曲线平缓的特点。 |
| 3. | But there is still a difficult problem present in the low specific speed sewage pumps : with changeable operation points , the motor is often destroyed by overload , which restricts the application of the pump in many fields
但是低比速排污泵在工况多变的场合极易因过载而烧毁电机，这一问题一直没有得到很好的解决，这大大限制了排污泵的使用范围。 |
| 4. | It is a vane pump with high head , small flow and low specific speed , which is smaller , flight and simpler in structure than positive displacement pump mulfistage centrifugal pump , and may handle liquid of high gas or steam content
该泵是一种高扬程，低比速的叶片泵，比容积式泵和多级离心泵体积小、重量轻、机构简单等优点，并可以输送气体或蒸气含量较轻的液体。 |
| 5. | The roto - jet pump is a new kind of very low specific speed pump which is developed in recent years . it is always used in carbin black , food production , chemical industry and deep well mining system to supply the steady outflow with low flux and high pressure
旋转喷射泵是近些年才发展起来的一种极低比转数泵，主要用在碳黑、食品、化工以及深井采矿系统中用以提供小流量高水头的稳定出流。 |
| 6. | By discussing in detail the shapes and types of pump characteristic curves and the effects of geometrical parameters on them , this paper points out that the main reason of the brake horsepower of the low specific speed sewage pump increasing with capacity rapidly is that we often select larger geometrical parameters such as b2 , ft and so on to enhance the capacity of the sewage pump
详细讨论了离心式排污泵特性曲线的形状和种类，以及几何参数对排污泵特性曲线的影响，指出排污泵设计中增大b _ 2 、 f _ t等几何参数是导致轴功率曲线随流量增加上升很快的原因。 |
| 7. | 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
推导了排污泵饱和轴功率特性产生的理论条件，导出了无过载排污泵设计的基本方程，在保证泵性能要求的前提下，同时实现无过载要求，讨论了低比速排污泵设计中存在的问题及解决的途径。 |
