What is a pump?

Help Pu popular name pump, its translation "pump". Pumps are often used to increase or decrease the pressure of a fluid or gas, and changes in pressure can be used to do work. Like a bicycle pump, when the piston in the cylinder moves up and down, the air in the cylinder will be pressed into the tire. This combination of cylinders and pistons can be used in gasoline-powered devices.

A pump is a device that uses mechanical rotary or reciprocating motion to transport or absorb liquids. According to the structure and the way of applying pressure to the liquid, it can be divided into three types:

(1) reciprocating

The principle is the same as using a straw to drink soda, the suction pipe is deep into the liquid, lift the piston, reduce the atmospheric pressure, and the atmospheric pressure on the liquid surface around the pipe presses the liquid into the pipe.

Reciprocating pumps have low speed and small capacity, and the liquid can be lifted very high, so they are suitable for pumping clean liquids, such as old-fashioned pumps.

(2) Rotary type

In the same principle as a reciprocating pump, replace the piston with a motor-driven gear, blade, or screw. Mainly in the liquid pressure, the shaft driven by motor, high speed, mostly used in viscous liquids, such as oil.

(3) centrifugal type

There is an impeller inside. When the pump rotates, the liquid in the impeller will flow out of the outlet by rotating centrifugal force. It doesn't matter whether the liquid is clean or not. Commonly used in agricultural irrigation, because the irrigation water contains sediment, so they all use centrifugal pumps.