摘要：离心泵的性能主要是以流量、扬程、所需功率及使用效率来体现的，这些参数之间存在着相互的联系，当流量或转速变化时，其他的参数也会发生相应的变化。要正确选择和使用离心泵，我们必须了解这些参数之间的关系。由于泵的理论还不够完善，所以要获取离心泵的性能参数主要还依赖于性能试验。离心泵的性能曲线共有四条，第一条是流量和扬程曲线，主要用于产品的选型和工作点的确定；第二条为流量与功率曲线，主要用于电机的选择和离心泵操作方法的参考；第三条曲线是流量与效率曲线，主要判断其是否节能；第四条为流量与汽蚀性能曲线，主要决定离心泵的安装高度、储槽压力等是否满足离心泵正常运行的要求。71226

毕业论文关键词：离心泵；性能曲线；管路系统

Design of centrifugal pump pipe system

Abstract：The performance of the centrifugal pump flow, head, power and efficiency to reflect, there is a mutual relationship between these parameters, when the flow rate or speed change, other parameters will change accordingly.To correct selection and use of centrifugal pump, we must understand the relationship between these parameters.As a result of the pump theory is not perfect enough, so to get the main also depends on the performance of centrifugal pump performance parameters test. Centrifugal pump performance curve of a total of four, the first is the flow and head curve, it is mainly used for product selection and determination of the working point;Article 2 for the flow and the power curve, choice and operation method of centrifugal pump is mainly used for motor reference;Article 3 of the curve is flow and efficiency curve, the main judge whether its energy saving;Article 4 for the flow and the cavitation performance curve, the main decision centrifugal pump installation height, reservoir pressure, whether to meet the requirements of normal operation of centrifugal pump.

Key words: centrifugal pump; Performance curve；Piping system

 目  录

1  引言 1

1.1  离心泵简介 1

1.1.1  离心泵组成 1

1.1.2  离心泵的过流部件 3

1.1.3  离心泵的工作原理 3

1.1.4  离心泵实验台对电器设备的要求 4

1.2  课题背景 5

2  离心泵性能参数的测定 7

2.1  流量测量 8

2.2  扬程测量 8

2.3  功率测量 9

2.4  转速测量 10

2.5  气蚀实验 10

   2.6  误差分析...11

3  离心泵管路系统的建立 12

3.1  管路系统建立基础 12

3.2  现有管路 12

3.3  开式闭式管路系统设计 14

3.3.1  开式离心泵管路系统设计 14

3.3.2  闭式离心泵管路系统设计 16

4  元器件的选择 18

4.1  电机的选择 18

4.2  联轴器的选择 19

4.3  液压阀的选择