Re: CREAKING --- The sound of everyday lives

Marchan
Quote:It has something to do with negative-pressure, which is less powerful than atmosphere pressure. The creaking point of the pump is fulcrum of the lever. On the end of the lever, it has a piston connected to shaft. The piston does up-and-down movement inside cylinder with packing inner wall. The piston goes down when lever is up, and vice versa. Well pump is applied the principle of leverage.

The cylinder has valve, which closes when the piston is up.

The under part of the cylinder has a pipe inserted into well hole, and it is underneath water surface. The diameter of a pipe is less than that of a cylinder. This has something to do with Pascals principle.　

When the lever is up, air exists lower part of cylinder is flooded out through circumference of piston or interspace of valve, and when the lever is pushed down swiftly, valve closes and piston goes up. This situation makes well water come up with negative pressure inside pipe, and it gushes from outlet of pump. When you continue making lever up and down, you can get water from well pump as much as you need.

Now let me explain Pump-priming effect.

As you know, up and down movements of lever never works for waters coming out when it is not used for a long time. This is because air inside pipe cant get out since it had already entered into lower part of piston through its circumference or interspace of valve. This makes water level equal inside pipe and well hole.

Priming water fills the space under piston. Then pump well gets back to normal, and spits out water.

By transposing airspace to water, water comes out from pump outlet by negative pressure.

Does that make sense?

Okabeno