最后给出了电子百分比转速表的静态和动态测试结果。
At last, testing results on static and kinetic characteristic of the Electronic Percent Turn...
对低比转速离心泵叶轮的水力设计具有一定的指导意义。
Results of this thesis provide guiding significance to waterpower design of impeller of the low specific speed centrifugal pump.
建议比转速应为直径比所取代，并启用水斗式水轮机新铭牌。
It is suggested that the specific speed would be replaced by diametric ratio, and the new nameplate would be used.
比转速在80 ~ 150之间的离心泵具有平坦的性能曲线。
Than the speed in the 80 to 150 between the centrifugal pump with a flat performance curve.
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.
因此，针对超低比转速泵的具体情况，进行了提高汽蚀性能的试验研究。
After thoroughly analysing the details of the ultra low specific speed pump, a series of experiment studies are carried out.
尤其是低比转速复合叶轮离心泵内部的流动更加复杂，亟待解决的问题也更多。
Especially the flow of compound impeller in the centrifugal pump at low specific speed is more complex and has more problems need urgently to resolve.
基于二元理论，用FORTRAN语言编程实现了高比转速混流泵叶轮的水力设计。
Based on the two-dimension theory, a computer code is made in FORTRAN language to design the high specific speed mixed-flow pump.
解决泵行业一直依据经验统计值确定面积比而不能使低比转速离心泵在设计点效率最高这一问题。
It is resolved that design condition efficiency for low specific speed centrifugal pump is not the highest in terms of experiential statistical area ration value.
实例表明：提出的计算方法能够提高低比转速离心泵的效率，充实了低比转速离心泵的设计理论。
A practical example showed that the efficiency of pumps with low specific-speed could be improved by using the calculation method presented, so that the design theory of such pumps was substantiated.
进而得到了比转速放大系数与流量放大系数的关系，以及建立在这一关系基础上的叶轮出口宽度计算公式。
The relationship between the two coefficients and the calculation formula for the impeller outlet width are also drawn out.
针对农用泵(运行工况多变且出口无流量调节阀)的特点和低比转速离心泵的轴功率在大流量区运行易过载的特性，提出了无过载离心泵的概念。
Based the brake horsepower characteristics of low specific speed centrifugal pump and the required features of pumps used for agriculture, the concept of non - overload centrifugal pumps is conceived.
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.
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.
通过改变叶轮口环间隙的大小对不同叶片型式的低比转速离心泵进行试验，证明口环间隙对低比转速离心泵效率的影响与泵叶轮的叶片的型式无关。
The experiments on different types of impeller are done by changing the clearance of wear-ring to prove that the clearance has no influence on the pump efficiency under various types of impeller.
我们看到进行核反应产生中微子的太阳核心的自转速度明显比太阳表面慢。
The core of the sun - where nuclear reactions produce neutrinos - apparently spins more slowly than the surface we see.
不像运行起来比它更稳定的直列六缸引擎或者极其流畅的V - 12引擎，卑微的四缸引擎会以一种比自身机轴转速高两倍的频率产生一上一下的振动。
Unlike the better balanced straight-six or even the ultra-smooth V-12 engine, the humble four-cylinder generates an up and down vibration with a frequency of twice the crankshaft's rotational speed.
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.
用算符分解算法(AOM)得到了系统的近似解析解，并研究了传动比和时变啮合刚度对拍击门槛转速的影响。
A-operator method (AOM) is used to study the influence of the speed ratio and time varying meshing stiffness on rattling threshold speed of the gear system.
从来没有工作在刀片比列出的最高转速转速大刀片。
Never operate blades at rotational speeds greater than the maximum RPM listed on the blade.
较具体地叙述了机组转速和空燃比的主要影响因素、关系曲线、控制系统构成和PID算法的实现方法。
The main influence factors of the speed and air-fuel ratio and the relation curves of the unit, the structure and PID algorithm of the system are described concretely.
在C6143型普通车床主传动系统中，由于传动比设计不够合理，致使主轴转速级数分布不均；
Due to the unreasonable design of the transmitting ratio in the major transmission system of lathe C6143, the progression of the spindle speed is asymmetrically distributed.
正交试验表明四个因素的主次顺序为：磨球级配、球磨机转速、球磨时间、球料比。
The sequence of the factors was determined by orthogonal experiments: ball gradation, milling rotational speed, ball milling time, and ratio of ball to powder.
因素有上下轧辊直径比、压下率、导入角和轧辊转速。
These factors include ratio of upper and lower roll diameter , reduction ratio , enterance angle and roll rotation speed.
结果发现，采用高转速、大球料比、合适的球径以及湿磨状态可以改善球磨效果。
It is found that the effect of ball milling can be improved when proper ball radius, high turning speed, large ball material ratio and moist milling state are adopted.
采用磁电式转速传感器对发动机转速、CVT输入和输出转速及传动带的位置即传动比的测试。
Magnetoelectricity rev transducer is chosen to test the rotate speed of the engine, of the input and output of CVT and to test the position of the transmission belt.
采用磁电式转速传感器对发动机转速、CVT输入和输出转速及传动带的位置即传动比的测试。
Magnetoelectricity rev transducer is chosen to test the rotate speed of the engine, of the input and output of CVT and to test the position of the transmission belt.
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