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2018-04-24View Original

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user
Reply #22018-04-24
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Reply #32018-04-24
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Reply #42018-04-24
pérdida
Reply #52018-04-24
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Reply #62018-04-24
user
Reply #72018-04-24
Translate the following 1
Reply #82018-04-24
pérdida
Reply #92018-04-25
pérdida
Reply #102018-04-25
最小流量线是在泵出口关闭时避免泵内液体温度过高,起到一个保护作用,一般都是安装有孔板的。
Reply #112018-04-25
恩,是的,不带调节控制阀的一般都有限流孔板!!
Reply #122018-04-25
多级离心泵出口基本都有单向阀的,这样停泵的时候还需要打开最小流量线吗?
Reply #132018-04-25
反应进料泵基本都是多级,流量大单极打不到压力要求,所以要设置多级,类似于多级压缩的压缩机,我觉得与小流量没有特别关系,与压力要求有必然联系,个人拙见。
Reply #142018-04-25
嗯,的确是这个情况,所以我用了一般二字!
Reply #152018-04-25
版主好,我觉得离心式屏蔽泵没有润滑油,全靠自身介质润滑冷却,只要泵在运行就要有量通过,否则轴承超温,后果严重。但是普通离心泵我觉得没必要上那么高配置,只有启闭时才会用到最小流量线,而且一般普通离心泵配置的最小流量线开度三分之二既可满足保护泵的作用。
Reply #162018-04-25
不好意思,强调与小流量没有必然要求主要是怕新手记住小流量与多级泵会有什么必然联系,实在不好意思
Reply #172018-04-25
前辈,请问下多级离心泵停机的时候也需要打开最小流量线吗?如果不开直接关闭出口或者关小出口以后停机影响大不大?
Reply #182018-04-25
最小流量线就是起保护作用的,只是停泵,将出口阀关小后停泵就好了,这个时间又不会很长。

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