
1747-BSN
1747-BSN产品特点
变频改造节能原理
a 泵类的特性和参数:
设在扬程内1m3的水的重量为1000kg,因此:
鉴于泵的设计与制造方面会有误差,故电机的输出功率应较轴功率计算值有5~20%的裕量,而后根据流量和扬程求出电动机的功率,图3为流量和扬程特性曲线。
纯粹用于抽水的功率叫有效功率
有效功率=(1000QH)/(75×60/0.736)=QH/6.11(kW)
式中,Q为流量(m3/min);H为总扬程(m)。
泵的轴功率=(有效功率)/ 泵的效率(kW)
电动机输出功率=(1.05~1.2)×轴功率(kW)
因泵的扬程大小、泵的型号不同,泵的效率不能一概而定,一般标准泵的大致效率曲线如图2所示。
1747-BSN
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1747-BSN
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1747-BSN
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