离心泵扬程较高，但出水量不大，适用于。
结果表明：迷宫螺旋泵扬程系数最大值随流量的增大而减小；
The analysis results show that the maximal value of the pump head coefficient declines when the flow rate increases;
本文从理论和实例出发，分析了在不降低效率的前提下，提高泵扬程系数的条件。
Based on the theory and the experience, the requirements for increasing the head coefficient under the condition of maintaining the efficiency were proposed in this paper.
其次，络筒机应据染缸的主泵扬程、液流量和外加压力的大小，调整不同纱支的卷绕密度。
Secondly, the packing density of wound yarn with different count should be adjusted according to the lift of main pump on dyeing kier, the flow of liquid and the pressure applied.
从性能上讲，该型式叶轮效率高和普通闭式叶轮相差不大，但用该型式叶轮泵扬程曲线较为陡降。
From the performance perspective, the type of impeller and the general efficiency closed impeller or less the same, but the type of impeller pump head curve dropped more.
通过对提高某化工装置反应器进料泵扬程两种方法的分析对比、实验研究，提出短叶片偏置设计法是提高低比转速离心泵扬程和效率的有效方法。
It is shown after analysis that the efficiency of roto-jet pump is higher than theefficiency of multistage pump and express pump when it operates in the region of low dis-charge and high lift.
在工艺条件允许的情况下，改变泵的流量、扬程、转速及介质的操作温度等操作参数，可以避免汽蚀的发生。
In the process conditions permit, the change in pump flow, head, speed and medium operating temperature operating parameters, to avoid the occurrence of cavitation.
用户确认泵出口去丁醇处理装置的最大扬程是合适的。
Ctc maximum head is suitable for pump discharge to butanol handling facility.
低比转速泵几何参数对扬程的影响，应当侧重于综合影响的研究。
The influences of geometrical parameters on low specific pump head should be emphasized on comprehensive influence.
在计算泵提供给气体的扬程时给出了三种算法，并对实例计算结果进行了分析比较。
About the calculation on the discharge head provided to gas by pump, the paper presents three kinds of calculation methods, analyzes and compares the case calculation results.
变速调节我们已经知道，轴流泵是在一定转速下工作的，而且获得相应的流量、扬程、功率和效率等。
Variable-speed control we already know, at a certain speed axial flow pump are working under, and to obtain the corresponding flow, lift, power and efficiency.
低比转速泵的高扬程决定了叶片流道内逆压梯度比较高，这种压力分布使得水流易于在叶片表面脱流分离，这一现象甚至在泵的设计点也难以避免。
The high head produced by the impeller means high adverse pressure gradient within blade passage and because of this the flow often separates from the blade surfaces even at the design point.
多级离心泵主要用于高扬程的应用环境，应用于深井、高层住宅的供水、消防供水等。
Multi-stage centrifugal pump is mainly used for high head applications environment, use deep, high-rise residential water supply, fire water supply.
利用长征系列发动机主泵作为动力源，提高其转速，解决了燃料节流阀试验要求的高扬程、高背压等技术难题。
High delivery lift and high backpressure required in fuel throttle valve test were obtained through higher rotation speed of the main pump.
而扬程和电机的效率均无多大变化空间，要使采卤电耗较低可从提高泵的效率和卤水的含盐量方面来想办法。
As there isn't much change room for head and motor efficiency, we have to take measures to increase pump efficiency and brine salinity to decrease the electricity consumption for brine extraction.
计算了泵的扬程、轴功率和效率，并与试验进行了对比，验证了计算方法的可行性。
By comparing the calculated water head, shaft power and efficiency with the experimental results, the method was proved to he feasible.
叶片型线的选择应满足边界层不分离条件及由欧拉方程——泵的基本方程所确定的理论扬程条件。
The choice of vane curve should satisfy the conditions of boundary layer non-separation and theoretical distance head by Eular equation-the basic equation of pumps.
东江泵站结合扬程变化幅度大的特点，在技术改造中采用双速全调节叶片的大型轴流泵机组型式，取得了明显的节能效益。
In the technology reform of Dongjiang Pumping Station, a large scale axial -flow pump with double speed is used to fitting in with the nature of the pump head varying greatly.
研究表明，流量、扬程、轴功率和效率切割指数具体数值都与普通清水离心泵不同。
The results show that the values of the flow rate, head, shaft power and efficiency trim exponents differ from existing trim exponents for normal centrifugal water pumps.
轴流泵叶片水力矩随流量变化的关系曲线存在一个马鞍区，并与流量-扬程曲线的马鞍区相对应。
There exists a saddle type zone in the hydraulic moment curve of axial-flow pump blades which corresponds to the saddle zone of discharge-head characteristic curve of the pump.
具有全扬程泵的特点，能够在全扬程范围内工作而保证电机不会过载。
It has full head feature. It can operate within the full head scope with assurance that the motor will not be overload.
论述了离心泵转速提高对流量、扬程、功率、汽蚀余量等参数的影响。
The paper discusses the effect of rotation rate on property parameters such as flow volume, delivery lift, power and cavitation etc.
低扬程泵装置有多种型式，竖井式贯流泵装置是一种较新的低扬程泵装置型式。
Low head pump system has several types, among which pit tubular pump system is a new one.
通过分析得出，旋喷泵在小流量、高扬程工况下运行时的效率高于多级泵和高速泵。
The efficiency of rotary-jet pumps under the operation of low flow and high delivery was higher than those of multistage pumps and high speed pumps through analyses.
随轴向间隙扩大，超小型泵的扬程系数、功率系数和效率都逐渐降低。
The head coefficient, power coefficient, and efficiency decreased with increasing axial clearance.
离心泵几何参数对扬程的影响。应当侧重于综合影响的研究。
In the research of the influences of geometrical parameters of centrifugal pump on the delivery lift, particular attention should be paid on the research of synthetic influence.
料浆的循环靠大流量、低扬程的轴流泵推动。
The circulation of materials is pushed by a big flow and low-lift axial flow pump.
指出切线泵的扬程系数与叶片数、喉部面积、集液器断面积的关系。
At the same times, the relationships of the head coefficient with the number of the blade, the throat area and the sectional area of the collector were analyzed.
输送水时，叶轮切割后，泵的扬程、轴功率、效率都下降。
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。
When pumping water, the head, shaft power and efficiency of the pump decrease with the reducing in impeller diameter.
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