pumps were designed to work under the principle of mechanical
energy sources in order to be able to pressurize fluids.
The high-pressure created by the hydraulic pumps causes
the fluids to flow to the outlets of the pump.
There a few different choices available for hydraulic
pump types. These types include the axial piston,
the radial piston, the internal gear, the external
gear, and the vane. The axial piston hydraulic pump
uses an piston that is axially-mounted to pressurize
fluids and the radial piston hydraulic pump uses a
piston that is radially-mounted about a central axis
to pressurize fluids. The fluid is pressurized by
the mechanical motion of the pump’s power source
that moves the piston through a chamber. An internal
gear hydraulic pump uses internal gears to pressurize
fluids while an external gear hydraulic pump uses
external gears to pressurize fluids. When the power
source of the pump causes the internal gears or external
gears to turn, the fluids become pressurized and start
to be forced through the pump outlets. A vane hydraulic
pump uses a vane to pressurize fluid. The vane rotates
causing the blades on the vane to force the fluids
out of the pumps’ outlet.
Hydraulic pump stages include single stage, double
stage, triple stage, and four or more pump stages.
Hydraulic pumps also include continuous operating
pressure, maximum operating pressure, operating speed,
operating horsepower, operating temperature, maximum
fluid flow, maximum fluid viscosity, displacement
per revolution and pump weight.