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2020-11-18View Original

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user
Reply #22020-11-18
Translate the following texts from chinese_simplified to portuguese. Return ONLY a valid JSON
Reply #32020-11-18
usercontent
Reply #42020-11-18
["1
Reply #52020-11-18
如果原计算中,泵的扬程系数取的较小,可以适当再放大点。不过,如果泵的扬程偏大较多,会带来运行费用增加。
Reply #62020-11-18
我用的是一个EXCEL表,其他大部分地方都可以自动计算,到了这一步,卡壳了。 不知道,把这个数据交给泵厂家,他们能否给出一个经济实用的结果。 项目中几十组泵,幸好大部分都是备用泵,不需要考虑并联的事情。
Reply #72020-11-18
“可是,有人说泵并联后曲线有迁移”。我不赞同这种说法,没有理论依据。
Reply #82020-11-19
数据表提交采购后,供货商返回资料,功率提了一档,流量和扬程不变。不知道具体是什么原因。 请教一下,1.功率提档后,实际操作中扬程能增大吗,弥补并联泵所造成的不确定性变化?这是设计者关心的问题。 2. 如果不是变频泵,在同样的流量和扬程下,输出电功率会随着额定功率增大而增大吗?也就是说,买了大一号的电机功率,除了采购和检修要贵一些,消耗电力会不会增大呢?这是运行者关心的问题。
Reply #92020-11-19
关于电机效率,设计院并不掌握准确的数据,一般来说电机功率越大,效率越高。厂家提了一档,应该是考虑电机效率。 1、功率提档后,实际扬程不增大,扬程与叶轮直径、叶轮角度、转速有关。 2、消耗电力不会增大。

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