Hydraulics is a well known technology that is used in a wide variety of industrial equipment such as: hydraulic brakes, hydraulic pumps, hydraulic cylinders, hydraulic lifts, hydraulic motors, hydraulic presses, hydraulic seals, hydraulic dock levelers, hydraulic valves, hydraulic hoists, automobiles, hose fittings, drilling rigs and agricultural equipment. You will find that hydraulic devices are being used in all types of industrial applications all over the world.
The principles and process of hydraulic technology is based on the fact that liquid, unlike gases and solids, can not be compressed. In other words, when external force is applied on certain incompressible liquids, a force is generated and it can be transmitted to serve some purpose. The most common type of fluid that is used in hydraulic systems is oil. This is because of its inherent lubricating nature and viscosity. However, many hydraulic engineering companies do develop and market environmentally friendly water-based hydraulic systems.
The most common usage of the principle of hydraulics is the car brake. A basic hydraulic setup would comprise of cylinders, pistons and the hydraulic, which is typically a type of oil. An interesting feature is that when pressure is applied to an incompressible liquid the force that is generated is a multiple of the pressure that was initially applied. Therefore a lot more force is coming out than what went in.
The major benefit of a hydraulic system is that a master cylinder can move pieces of machinery, which are known as slaves, and the system can move more than one slave at a time. The laws of physics enable us to multiply the force that is exerted by the master cylinder by changing the size of one piston in relation to the other in order to move heavier and larger loads.
Some other components that are used in a typical hydraulic setup are valves, actuators and accumulators. These are very important devices that are used in controlling the fluid movements, the operating pressures, rotating the mechanical components, and the storage of fluids. Hydraulic pumps and motors etc. are able to generate more power density for machinery than electric engines can.