流体机械

2004, (04) 20-22

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离心泵安装高度计算中出现的问题分析
Analgsis on Problem of Installing Height Calculating for Centrifugal Pump

杨建一,袁中凯
YANG Jian-yi,YUAN Zhong-kai(Hebei University of Science and Technology,Shijiazhuang 050018,China)

摘要(Abstract):

从防止汽蚀出发 ,通过一系列分析运算说明 ,从允许吸上真空度Hs 或从气蚀余量Δh两种途径计算离心泵最大安装高度 ,方法正确且结果完全一致。指出了有些资料的计算公式中各项的单位不一致以及把 2 0℃清水的饱和蒸汽压Pv,水 与被输送液体的饱和蒸汽压Pv ,液 混淆等失误
On the basis of preventing vapor corrosion and using the basic principle of calculating the physical volume,it is presented that the two methods of calculating the installing height by permissible vacuum suction height HS or net pump suction head Δh are corrected and their results are absolutely consistent.The mistakes that the units of variables in formula do not unite in materials and that the saturation vapor pressure of water at 20 ℃ is confused with the saturation vapor pressure of liquid transported are pointed out.

关键词(KeyWords): 离心泵;汽蚀;安装高度
centrifugal pump;vapor corrosion;installing height

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作者(Author): 杨建一,袁中凯
YANG Jian-yi,YUAN Zhong-kai(Hebei University of Science and Technology,Shijiazhuang 050018,China)

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