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["Le capteur de pression力 测量水泵的扬程",,"

2019-09-06View Original

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"Chers maîtres,咨询下。我们在现场有一个项目,在现在管道上几乎相差不到5 cm的地方安装了一块压力表和一块压力传感器。压力表的读数是1米,压力传感器的读数是19m。请各位大侠分析下,两个压力装置测出来的压力差别如此大的可能原因是什么。还有就是用压力传感器测水泵扬程,是不是压力传感器的读数是包括压力传感器安装位置与水位液面的位置差加上水泵到压力传感器之间的沿程和局部损失。压力传感器测的压力值是否就是压力传感器后的管道所需要的压力值。",Z
Reply #22019-09-06
"Les sont-接在泵出口阀门前面吗"Z
Reply #32019-09-10
"En ingénier程上上一般认为泵进出口压差ΔP就是泵的扬程。 P=ρg+z+V112g=He=Pρg+zZV222g=Hf;当泵的吸入和排出管径相差不大时,可以忽略速度头头和阻力损失Z忽略泵安装高度(即ZZ与ZZ之间的高度差)Z一般认为泵进出口压差ΔP就近似等于泵的扬程Z如果要较准确地测量泵的扬程Z需要确定流量Z确定进出口管径ZZ安装高度差Z同时泵进出口安装压力变送器和真空表Z不知楼主是否明白。"Z
Reply #42019-09-13
"Attention注意 安安装位置Z在同一位置。压力表一般为一次仪表Z传感器为数字显示为二次仪表Z净水器的计算楼上已经给出Z要确认是哪个数值对应公式中的参数就可以了。"Z

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