[".关于离심풍기기 풬량 계산에 대한 문제

2017-05-16View Original

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有一台离心鼓风机用变频器控制，参数为流量：15000m3/h；全压：20000Pa，主轴转速2900r/min，介质比量：1.2；进口温度：20℃。电机参数标称电流235A；功率：132kw；三相380V；频率：50HZ;恒转矩频率范围：30-50HZ；变转矩频率范围：5-50HZ；CoSφ0.92；工况下频率40HZ，电流126A，电压380V，进口20摄氏度，风压8700Pa。风机的出口管DN600。其它都按照标况计算。请问如何计算出工况下鼓风量？

Reply #22017-05-19

每个风机的型线不一样的，一定要跟性能曲线结合计算。直接算是算不出来的。目前实际升压确定为8700Pa，按转速的平方和压力成正比的比例定律来看，换算到50Hz，8700Pa对应的压力是13594Pa。你应该查一下性能曲线上，原50Hz时升压13594Pa对应的风量是多少，比如是Q 实际风量就是4Q/5

Reply #32021-05-20

制造厂一般会提供性能曲线，和厂家要即可！

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