What is a hydraulic system?
A hydraulic system is a drive technology where a fluid is used to move the energy from e.g. an electric motor to an actuator, such as a hydraulic cylinder. The fluid is theoretically uncompressible and the fluid path can be flexible in the same way as an electric cable.
What is a hydraulic system used for?
Hydraulic systems are mainly used where a high power density is needed or load requirements chance rapidly. This is especially the case in all kinds of mobile equipment such as excavators and in industrial systems such as presses.
In wind turbines, hydraulics is used for pitch and brake control. In some cases, different auxiliary systems such as hatches and cranes are also powered by hydraulic systems.
Why are hydraulic systems used?
The main reason for using hydraulics is the high power density and secondly the simplicity coming from using few components to realize complex and fast moving machines with a high degree of safety.