This paper introduces the main energy saving technologies of centrifugal pump. And the author proposes a new energy saving technology which is called prerotation regulated by the inletguidevane.
本文介绍了离心泵节能的主要技术，并提出了前置导叶预旋调节的节能技术。
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A feature of this guidevane was existence of a long inlet duct with big meridional divergent angle in order to fulfill the requirements of the structure.