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["Le problème de l'ouverture des des les valves de sortie出口门"

2019-06-02View Original

Thread Content

["En raison de la flux de la由于工艺流量不需要那么多,多级离心泵出口阀门的开度偏小,额定定流量为225立方米每小时,设计扬程为等为40米,出口流量为8-立方米每小时,出口压力为3MPa,这对平衡盘和两端机封有影响吗?平衡管压力波动大,这是由于这个原因造成的吗?"
Reply #22019-06-02
"Oui,平衡管流量大,流速快,可能超温导致局部气化,可以感受一下平衡管温度,温度高的时候一定压力波动,甚至导致泵抽空。开返罐回流完美解决此问题。"
Reply #32019-06-02
"Oui,肯定有影响,泵腔高压端压力超过额定压力,平衡盘的轴向力增大,轴承寿命受影响;密封腔的压力也高于额定压力,密封寿命缩短;平衡管压力会波动的。最好增加出口回流以走大循环,不要用小循环!"
Reply #42019-06-02
"Oui,已经接近最小流量点。泵稳定性会下降、振动升高、温度升高。 平衡盘影响有但不是主要问题。 主要是水力引起的振动等ui,机组整体寿命受影响。建议增大流量。"
Reply #52019-06-02
"Oui,绝对有影响,不需要大流量时及时停泵或者增加出口回流;我也遇到过同样的用户甚至操作人员图方便会压进口阀门开大级泵,平衡装置几天就损坏。 :L"
Reply #62019-06-02
"Merci😊"
Reply #72019-06-02
"Merci😊"
Reply #82019-06-02
"Si于于最小流量的话,现场会有很明显的异常现象,很容易发现比如声音大、震动大等ui。"
Reply #92019-06-03
"Oui,应该再循环以带走热量否则泵电流波动、汽蚀。"

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