离心泵特性曲线上的效率最高点称为设计点，泵在该点对应的压头和流量下工作最为经济。
Centrifugal pump characteristic curve on the efficiency of the highest point known as the design point, a pump at the point corresponding to pressure head and flow of work under the most economic.
本文结合实际介绍了离心泵四象限运行特性曲线自动化试验系统的测试回路，并给出了测试系统的硬件方案和软件设计方法。
The automatic four quadrant characteristic test system of centrifugal pump was introduced, and the implementation method of the hardware and software of the test system were given.
分析了低比转数离心泵出现不稳定扬程-流量特性曲线及功率过载的原因，提出了相应解决办法。
The cause of occurrence of power overload and the unstable curve of head-flow volume for low rate ratio pumps was analyzed in this paper. Some methods, then, were presented to solve the problems.
分析了低比转数离心泵出现不稳定扬程-流量特性曲线及功率过载的原因，提出了相应解决办法。
The cause of occurrence of power overload and the unstable curve of head-flow volume for low rate ratio pumps was analyzed in this paper. Some methods, then, were presented to solve the problems.
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