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2018-08-17View Original

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user nâ
Reply #22018-08-17
user
Reply #32018-08-17
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Reply #42018-08-17
user nâ
Reply #52018-08-17
user nâ
Reply #62018-08-18
user []
Reply #72018-08-19
1 泵流量和转速会影响NPSHr,因此泵在运行过程中采用变频调速、变更流量等就会影响NPSHr,同理,凡是与流量(流速)的其他因素均会与之关联 2 泵入口设置诱导轮可减小泵要求的汽蚀余量值,当诱导轮腐蚀或损伤,对泵的汽蚀余量能力发生了变化
Reply #82018-08-21
如果不是变频电机必须气蚀余量不会变化,介质进入泵体的低压区产生的压降只和泵本身有关,有效气蚀余量和当地的气压,介质的温度和饱和蒸气压,以及安装高度有关,一般来说这些都是固定不变的。

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