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 inlet guide vane.

本文泵节能的主要技术，并提出置导叶预旋调节的节能技术。

This paper introduced the energy saving principle of air intake prerotation adjustment and the application area and method of air intake prerotation regulator.

进气预旋调节的节能原理及进气预旋调节装置的应用范围和使用方法。