Please help me to link/site to learn how pressure engerates in a pressure wash machine/firefighter truck?

Question

I want to learn the mechanism, how it works

Answer 1

For pictures and all search the net..

Fire truck pumps, mostly centrifigual pumps, they allow water to flow into the center of the impeller (the eye) and as it hits the fins of the impeller (inside propeller) get thrown to the outsideof the pump. , the outside of the pump is not exactly round, but narrows down near the discharge outlet, this causes the water to go out the outlet, and the spinning causes the pressure. once the water is thrown out by the impeller, there is a vaccum which will allow water to be then sucked into the pump (unless air gets in there breaking the vaccum)

As far as the Pressure washer, it is based off of a positive dispacement pump. This pushes a certain amount of water out each movement of the pump (similar to an old t-handle bicycle air tire pump) fast enough builds up volume to be useable, and pressure can be exceedingly high, if it hits the high point, it pushes past a pressure regulator to go back into the low pressure side so you stay at max pressure without exceeding it.

There is more to it than that, with hydraulics, friction loss and all that fun stuff, but that is effectivly how the pumps themselves work.

Answer 2

I think you want to know how these create water pressure.
It is with a pump. Most fire engines have centrifugal pumps. Three basic pump types are centrifugal, gear and reciprocating.

Search the Internet for "pump design." It will lead you to the answers you seek.