A MOUSE THAT HAS ONLY ONE HOLE IS QUICKLY CAUGHT…
Hydraulics is the transmission of signals, forces, and energy, or for lubrication purposes. The hydraulic block of today’s technology looks almost painfully full of holes; while it might remind the viewer of Swiss cheese, however, the technology behind it is complex and incredibly versatile.
Hydraulics is one method of transmission – an alternative to mechanical gears or electrical or pneumatic transmissions. The power transmission is provided by a hydraulic fluid; this is usually a particular type of mineral oil, but it can also be a more environmentally-friendly option such as water or special ester or glycol fluids. The transmitted forces are a result of the pressure and the amount of fluid streaming through. A distinction can be made here between:
hydrodynamic systems with a pump and a turbine, in which changes in revolution speed and torque is produced by kinetic energy from the fluid; and
hydrostatic systems, which, first and foremost, transform mechanical power from a machine (electric motor, diesel engine, etc.) to hydraulic power via a pump. The hydraulic power is then attached to a load (generator engine) and transformed back into mechanical power (continuously variable). In hydraulic cylinders, this translates to linear motions; in hydro-motors, to rotational movement.