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[". ["Problèmes de puissance de fonctionnement"," "Aide : Est-ce que le décalage de de la. 压出在泵设计运行工况范围内适当降低出口压力,电机运行功率是上升还是

2019-09-23View Original

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求助:在泵设计运行工况范围内,适当降低出口被压,电机运行功率是上升还是下降?
Reply #22019-09-23
能说明一下原理吗?谢谢
Reply #32019-09-23
个人理解的,仅供参考,背压降低,扬程和流量增大,P=HQpg/3600,
Reply #42019-09-23
降低出口压力,则从性能曲线可以看出,流量是增加的,流量增加,功率上升。
Reply #52019-09-24
耐腐蚀化工泵,塑料泵,不锈钢泵厂家13866952440(微信同号)
Reply #62019-09-24
一般情况下,离心泵都具有连续向下的性能曲线,流量随着扬程的降低逐渐变大。在操作过程过程中,将泵背压减少,泵的工作点会被动地随着装置曲线向低扬程大流量点偏移,通过泵轴功率计算公式计算(轴功率=流量×扬程×9.81×介质比重÷3600÷泵效率),泵的功率会升高,电机的运行功率也会相应的跟着升高。
Reply #72019-10-01
流量上升,扬程下降,乘积上升,没有依据。虽然实际运行中的确如此。

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