A10VO28DR

A10VO28DR

A10VO28DR

什么是泵的最小流量線

    為了保證泵安全起動和正常運轉，要求泵有最小排出流量，這就是離心泵的最小流量。泵的工作流量低于額定流量30％時，應設置泵在流量下正常運轉的最小流量線（即在離心泵出口管道上加一條返回線），稱為最小流量線。

1

    當流量低于泵最小流量時，振速會增大，為了防止泵發生氣蝕，打開最小回流線進行調節，使泵維持在穩定運行狀態（作用跟壓縮機的防踹振線有點像）

2

    高壓離心泵起泵時，為了防止泵憋壓損壞，在起泵前打開最小回流線。

3

    有些離心泵不能停泵，例如鍋爐給水泵。鍋爐通常由多臺泵供水，根據需求量不一樣（類如冬天上半夜多白天少，下半夜偷懶）需要采用其中幾臺泵供水，有了這個最小流量管線，需要關閉的泵可以在最小流量處循環（消耗功率最小）但是不需要停泵-灌泵-開泵反復操作。

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