Conception of centrifugal
Centrifugal is actually object inertial performance. Such as an umbrella droplets, when umbrella slowly turns, water droplets will follow the umbrella rotation, because the friction of umbrella and droplets gives droplets centripetalforce. But if umbrella rotates faster, the friction does not bring water droplets to make circular motion that shall be delivered from the umbrella to outer sports. It's like by a rope pulling stone to do circular motion, if too fast, rope will disconnect, stones will fly out. This is the so-called centrifugal. Centrifugal pump is designed according to this principle. High speed rotating impeller blades drive water turns, water throw, so as to achieve the purpose of transmission.
