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1、1 第一章流体流动一、压强1、单位之间的换算关系：221101.3310330/10.33760atmkPakgfmmH OmmHg2、压力的表示（1）绝压：以绝对真空为基准的压力实际数值称为绝对压强（简称绝压），是流体的真实压强。（2）表压：从压力表上测得的压力，反映表内压力比表外大气压高出的值。表压=绝压-大气压（3）真空度：从真空表上测得的压力，反映表内压力比表外大气压低多少真空度=大气压-绝压3、流体静力学方程式0ppgh二、牛顿粘性定律FduAdy为剪应力；dudy为速度梯度；为流体的粘度；粘度是流体的运动属性，单位为 Pas；物理单位制单位为g/(cms)，称为 P（泊），其百分之
2、一为厘泊cp 111Pa sPcP液体的粘度随温度升高而减小，气体粘度随温度升高而增大。三、连续性方程若无质量积累，通过截面1 的质量流量与通过截面2 的质量流量相等。2 111222u Au A对不可压缩流体1122u Au A即体积流量为常数。四、柏努利方程式单位质量流体的柏努利方程式：22upg zWehf22upgzE称为流体的机械能单位重量流体的能量衡算方程：HfHegpguz22z：位压头（位头）；22ug：动压头（速度头）；pg：静压头（压力头）有效功率：NeWeWs轴功率：NeN五、流动类型雷诺数：ReduRe是一无因次的纯数，反映了流体流动中惯性力与粘性力的对比关系。（1）层
3、流：Re2000：层流（滞流），流体质点间不发生互混，流体成层的向前流动。圆管内层流时的速度分布方程：2max2(1)rruuR层流时速度分布侧型为抛物线型（2）湍流Re4000：湍流（紊流），流体质点间发生互混，特点为存在横向脉动。文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2
4、V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2
5、Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2
6、U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5
7、F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K1
8、0G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编
9、码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O
10、10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G73 即，由几个物理量组成的这种数称为准数。六、流动阻力1、直管阻力范宁公式22fl uhdfffphHgg（1）层流时的磨擦系数：64Re，层流时阻力损失与速度的一次方成正比，层流区又称为阻力一次方区。（2）湍流时的摩擦系数(Re,)fd（莫狄图虚线以下）:给定Re，随d增大而增大；给定d，随Re增大而减小。（2fpu,虽然u增大时,Re增大,减小，但总的fp是增大的）()fd（莫狄图虚线以上），仅与d有关，2fpu,这一区域称为阻力平方区或完全湍流区。2、局部阻力（1）阻力系数法22fuh为局部阻力系数，无因次。出口损失1.0
11、出口；进口损失0.5进口2、当量长度法22fle uhd注意：（1）管路出口动能和出口损失只能取一项。（2）不管突然扩大还是缩小，u 均取细管中的流速；七、复杂管路文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3
12、O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L
13、2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR
14、2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V
15、2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN
16、5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K
17、10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G74
18、1、分支管路(1)连续性方程：总管的质量流量等于各分支管路上的质量流量之和12WsWsWs，对不可压缩流体12VsVsVs(2)无轴功时的柏努利方程：1122ffEEhEh2、并联管路123ABVsVsVsVsVs123fffhhh八、流量测量1、变压头的流量计（恒截面）：（1）测速管（皮托管）；（2）孔板流量计；（3）文立里流量计2、变截面（恒压差）流量计转子流量计第二章流体输送机械一、离心泵的主要部件叶轮：泵壳（蜗壳）：（1）集液作用，（2）转能作用文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4
19、 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3
20、M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G
21、7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:
22、CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10
23、Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4
24、 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5
25、M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G75 二、气缚现象与气蚀现象气缚现象：因泵内存在气体而导致吸不上液体的现象称为“气缚现象”气蚀现象：离心泵工作时，泵入口处形成真空，当真空达到一定时液体部份汽化；溶于水中的氧逸出，含汽泡的液体进入高压区后，汽泡急剧凝结破裂，产生高频、高冲击力的水击现象，造成对叶轮和泵壳的冲击，使材料疲劳而受到破坏，这种现象称为
26、气蚀现象。三、离心泵的特性曲线HQ：Q增大，H减小。NQ：Q增大，N增大；流量为 0 时 N最小所以泵要在流量为0 时启动。NeHQgQ：Q增大，先增大（流量为 0 时为 0），达到最大值后减小。四、离心泵的允许安装高度1、离心泵的允许吸上真空度法允许吸上真空度Hs：指为避免发生气蚀现象，离心泵入口处可允许达到的真空度：01ppHsgHs是在 1at 下以 20的清水为介质进行的，若输送液体或操作条件与此不符，则应校正。文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码
27、:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O1
28、0Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V
29、4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z
30、5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U
31、4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F
32、3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10
33、G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G76 泵的允许安装高度：21012fuHgHsHg由于 Hs随流量 Q的增大而减小，所以计算安装高度时应以最大流量下的Hs计算。2、气蚀余量法允许气蚀余量：指泵入口处的静压头与动压头之和必须大于液体在操作温度下的饱和蒸汽压的某一最小允许值，以防气蚀现象的发生。2112vppuNPSHggg泵的允许安装高度001vfppHgNPSHHgNPSH随
34、流量的增大而增大，在确定安装高度时应取最大流量下的NPSH。五、离心泵的工作点和流量调节泵的特性曲线与管路特性曲线的交点，即为离心泵的工作点。1、管路特性曲线调节流量关小出口阀门，阻力变大，管路特性曲线变陡，工作点由M M1，Q减小，H增大。开大出口阀门，阻力变小，管路特性曲线变平坦，工作点由M M2，Q增大，H减小。2、泵的特性曲线调节流量文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档
35、编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3
36、O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L
37、2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR
38、2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V
39、2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN
40、5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K
41、10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G77（1）改变转速：若离心泵的转速变化不大（20%），则有比例定律：QnQn;2()HnHn;3()NnNn转速提高，泵的特性曲线上移，工作点由M M1，Q增大，H增大。转速降低，泵的特性曲线下移，工作点由M M2，Q减小，H减小。（2）切削叶轮：切割定律若某一离心泵的叶轮经切割变小（10%），则有切割定律：切割后泵的特性曲线下移，工作点由M M2，Q减小 H减小。QDQD;2()HDHD;3()NDND（3）离心泵的串、
42、并联文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码
43、:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O1
44、0Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V
45、4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z
46、5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U
47、4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F
48、3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G78 泵的并联两台离心泵并联且各自的吸入管路相同，在一定的压头下的总流量等于两单台泵流量相加，管路特性曲线越平坦，泵的并联工作愈有利。12HHH12QQQ1Q和1H满
49、足泵 1 的特性曲线方程，2Q和2H满足泵 2 的特性曲线方程。泵的串联两台离心泵串联，一定流量下的总压头等于两单台泵压头相加，总压头总是小于两台泵压头的两倍。管路特性曲线越平坦，泵的串联工作愈有利。12HHH12QQQ1Q和1H满足泵 1 的特性曲线方程，2Q和2H满足泵 2 的特性曲线方程。六、往复泵1、往复泵的特征（1）具有正位移特性。(压头与流量之间无联系)（1）有自吸作用；（2）流量具有不均匀性；文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10
50、Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4 HR2Z5M1V2U4 ZN5F3M2K10G7文档编码:CM3O10Z9L2V4