water pump
A water pump is a device for pumping and moving water (see also water art ). All pump designs are used, but they are tailored to the physical properties of the medium. Typical designs are the piston pump , the plunger pump , the Archimedean screw , the centrifugal pumps in various designs and the hydraulic ram . Depending on the type of manual operation, the term lever pump is common.
The water pump in the form of a bucket wheel is probably the oldest of all pumps. Water pumps enable the settlement of arid areas and are widespread.
In pumped storage power plants , water pumps are used to store energy .
history
Reciprocating pumps were already used by the Greeks and Romans for pumping water in ancient times . In the Netherlands, water pumps were used to drain cities as early as the 13th century.
Colloquially, especially in the Saxon region, the outdated term “plump” (originally East Central German, East Low German) is used.
Water pumps for engine cooling in vehicles
Coolant pumps (outdated water pumps) are found in liquid-cooled internal combustion engines to circulate the coolant . The thermosiphon and evaporative cooling , both of which do not require a pump, are obsolete . Mechanical coolant pumps in vehicles and stationary engines are driven by V-belts, flat belts (Polyrib), toothed belts or toothed wheels. With unregulated coolant pumps, the flow rate depends on the engine speed. A coolant pump in a truck typically requires an output of up to about 7 kW . With an electromagnetic clutch (on the market since 2009), needs-based control can save between 0.5 and 1.5 percent of fuel.
