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2019-03-07View Original

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Reply #22019-03-07
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Reply #32019-03-07
1正常工作 kukou
Reply #42019-03-07
}
Reply #52019-03-07
能运行,3.5+0.3=3.8〈4.5
Reply #62019-03-07
答:可以正常工作。3.5+0.3=3.8m小于NPSHR4.5米
Reply #72019-03-07
可以 4.5-3.5-0.3-0.6=0.1 余量足够
Reply #82019-03-07
能正常工作,计算如下:10.3-4.5-0.3-0.5=5>3.5
Reply #92019-03-07
本帖最后由 飘过_WEWJ 于 2019-3-7 09:07 编辑 可以。10.3-4.5-0.3-0.5=5>3.5
Reply #102019-03-07
能正常工作,标准大气压下水柱-NPSHR-吸入管损失-安全余量>吸上垂直距离:10.3-4.5-0.3-0.5=5>3.5
Reply #112019-03-07
沿海地区大气压力按10米计。水温常温,饱合蒸汽压忽略不计。初启泵时:吸上高度为 10-4.5-0.3-0.5=4.7米,大于3.5米,故启泵时是可以正常工作的。
Reply #122019-03-07
可以正常工作。泵的允许安装高度H=10.33-4.5-0.3-0.24=5.29m,泵的实际安装高度为3.5米,实际安装高度小于允许安装高度,所以泵可以正常工作。

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